<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.4.5version>
<relativePath/>
parent>
<groupId>com.yjqgroupId>
<artifactId>reggie_take_outartifactId>
<version>1.0-SNAPSHOTversion>
<properties>
<maven.compiler.source>8maven.compiler.source>
<maven.compiler.target>8maven.compiler.target>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-thymeleafartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-redisartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-cacheartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-mailartifactId>
<version>2.2.6.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
<scope>compilescope>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-boot-starterartifactId>
<version>3.4.2version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.20version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>fastjsonartifactId>
<version>1.2.76version>
dependency>
<dependency>
<groupId>commons-langgroupId>
<artifactId>commons-langartifactId>
<version>2.6version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.23version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<version>2.4.5version>
plugin>
plugins>
build>
project>
server:
port: 8080
spring:
application:
#应用的名称,可选
name: reggie_take_out
datasource:
druid:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/db_reggie?serverTimezone=Asia/Ningbo&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
username: root
password: 123456
mybatis-plus:
configuration:
#在映射实体或者属性时,将数据库中表名和字段名中的下划线去掉,按照驼峰命名法映射
map-underscore-to-camel-case: true
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
global-config:
db-config:
id-type: ASSIGN_ID
src/main/java/com/XXX/reggie/ReggieApplication.java
package com.yjq.reggie;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@Slf4j //直接可使用log日志
@SpringBootApplication
public class ReggieApplication {
public static void main(String[] args) {
SpringApplication.run(ReggieApplication.class,args);
log.info("项目启动成功..."); //测试项目启动
}
}
config/WebMvcConfig
package com.yjq.reggie;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@Slf4j //直接可使用loge
@SpringBootApplication
public class ReggieApplication {
public static void main(String[] args) {
SpringApplication.run(ReggieApplication.class,args);
log.info("项目启动成功...");
}
}
再次启动查看日志是否成功,然后访问页面http://localhost:8080/backend/index.html
ps:不管用的看看放的路径是否正确,启动类要在最外层
http://localhost:8080/backend/page/login/login.html打开登陆页面
按下F12,点击登录按钮,发送请求并题交参数
创建实体类Employee与数据模型(employee表)映射
创建实体类entity / Employee.java
package com.yjq.reggie.entity;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import java.io.Serializable;
import java.time.LocalDateTime;
/**
* 员工实体类
*/
@Data
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
private Long id; //主键
private String username; //用户名
private String name; //账号
private String password; //密码
private String phone; //手机号
private String sex; //性别
/**
* 驼峰命名自动映射sql表中的下划线命名
* application.yml配置文件中配置
*/
private String idNumber; // 身份证号
private Integer status; //状态 0:禁用,1:正常
@TableField(fill = FieldFill.INSERT)
private LocalDateTime createTime;
@TableField(fill = FieldFill.INSERT_UPDATE)
private LocalDateTime updateTime;
@TableField(fill = FieldFill.INSERT)
private Long createUser;
@TableField(fill = FieldFill.INSERT_UPDATE)
private Long updateUser;
}
创建mapper,service,controller层
项目结构图
mapper层
( 注意:写接口,使用MybatisPlus可继承BaseMapper<>方便简单CRUD)
package com.yjq.reggie.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.yjq.reggie.entity.Employee;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface EmployeeMapper extends BaseMapper<Employee> {
}
service层
实现通用增删改查的service接口
([service接口继承IService]
(https://blog.csdn.net/weixin_38111957/article/details/92415413))
package com.yjq.reggie.service;
import com.baomidou.mybatisplus.extension.service.IService;
import com.yjq.reggie.entity.Employee;
/***
* 通用 Service CRUD 封装IService (opens new window)接口,
* 进一步封装 CRUD 采用 get 查询单行 remove 删除 list 查询集合 page 分页
* 前缀命名方式区分 Mapper 层避免混淆,(mapper用select等字眼,service用get等字眼)
* 泛型 T 为任意实体对象
* 建议如果存在自定义通用 Service 方法的可能,
* 请创建自己的 IBaseService 继承 Mybatis-Plus 提供的基类 ServiceImpl
* 对象 Wrapper 为 条件构造器
*/
public interface EmployeeService extends IService<Employee> {
}
自定义通用Service方法
service实现类 继承ServiceImpl
并执行EmployeeService 接口
package com.yjq.reggie.service.impl;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yjq.reggie.entity.Employee;
import com.yjq.reggie.mapper.EmployeeMapper;
import com.yjq.reggie.service.EmployeeService;
import org.springframework.stereotype.Service;
/***
* service实现类 继承mp提供通用的service基类 ServiceImpl
* ServiceImpl
* 2个泛型 1.EmployeeMapper Mapper接口
* 2.Employee 对应entity(对象、实体)
*/
@Service
public class EmployeeServiceImpl extends ServiceImpl<EmployeeMapper,Employee> implements EmployeeService {
}
import com.yjq.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@Slf4j
@RestController
@RequestMapping("/employee") //请求路径url
public class EmployeeController {
@Autowired
private EmployeeService employeeService;
}
编写 通用返回结果Result类
/common / Result
(通用结果类,服务端响应的所以结果最终都会包装成各种类型返回给前端页面)
需要后端返给前端code,data,msg
package com.yjq.reggie.common;
import lombok.Data;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
/**
* 通用结果类,服务端响应的所以结果最终都会包装成各种类型返回给前端页面
* @Data注解没写,会显示接口406错误
* @param
*/
@Data
public class Result<T>{
private Integer code; //编码:1成功,0和其它数字为失败
private String msg; //错误信息
private T data; //数据
private Map map = new HashMap(); //动态数据
public static <T> Result<T> success(T object) {
Result<T> res = new Result<T>();
res.data = object;
res.code = 1;
return res;
}
public static <T> Result<T> error(String msg) {
Result res = new Result();
res.msg = msg;
res.code = 0;
return res;
}
public Result<T> add(String key, Object value) {
this.map.put(key, value);
return this;
}
}
登陆方法代码实现
根据post请求方式,请求URL @PostMapping("/login")
根据返回的Jason数据@RequestBody Employee employee
需要用到request去getSession
public Result<Employee> login(HttpServletRequest request, @RequestBody Employee employee)
{
return null;
}
@Autowired
private EmployeeService employeeService;
/**
* 员工登录
* @param request
* @param employee
* @return
*/
@PostMapping("/login") // @RequestBody接收前端 发送过来的JSON风格的数据,将其转化为相应的对象
public Result<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
//1.将页面提交的密码password进行md5加密
String password = employee.getPassword();
password = DigestUtils.md5DigestAsHex(password.getBytes());
//2.根据页面提交的用户名username查询数据库
LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
queryWrapper.eq(Employee::getUsername,employee.getUsername());
Employee emp = employeeService.getOne(queryWrapper);//数据唯一(表中属性为Unique)
//3.如果没有查询到则返回登录失败结果
if (emp == null){
return Result.error("用户名不存在!");
}
//4.密码比对,如果不一样则返回登录失败结果
if (!emp.getPassword().equals(password)){
return Result.error("用户名或密码错误!");
}
//5.查看员工状态,如果已禁用状态,则返回员工已禁用结果
if (emp.getStatus() != 1){ // 账号被禁用,status == 1,账号可以正常登录
return Result.error("账号被禁用,请联系管理员或客服!");
}
//6.登录成功,将用户id存入Session并返回登录成功
request.getSession().setAttribute("employee",emp.getId());
return Result.success(emp);
}
实现步骤:
1、创建自定义过滤器LoginCheckFilter
2、在启动类上加入注解@ServletComponentScan
3.完善过滤器的处理逻辑
…/Application.java 启动类中加上@ServletComponentScan
注解
package com.yjq.reggie;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
@Slf4j //直接可使用loge
@SpringBootApplication
@ServletComponentScan //过滤器
public class ReggieApplication {
public static void main(String[] args) {
SpringApplication.run(ReggieApplication.class,args);
log.info("项目启动成功...");
}
}
package com.yjq.reggie.filter;
import com.alibaba.fastjson.JSON;
import com.yjq.reggie.common.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* 检查用户是否已登录
*/
@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
public class LoginCheckFilter implements Filter {
public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher(); //匹配器,专门用来路径匹配的
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
//1.获取本次请求的URI
String requestURI = request.getRequestURI();
log.info("拦截到请求:{}",requestURI);
//定义不需要处理的请求路径
String[] urls = new String[]{
"/employee/login",
"/employee/logout",
"/backend/**", //AntPathMatcher 路径比较,通配符匹配
"/front/**"
};
//2.判断本次请求是否需要处理
boolean check = check(urls,requestURI);
//3.如果不需要处理,则直接放行
if(check){
log.info("本次请求{}不需要处理",requestURI);
filterChain.doFilter(request,response);
return;
}
//4.判断登录状态,如果已登录,则直接放行
if(request.getSession().getAttribute("employee") != null){
log.info("用户已登录,用户id为:{}",request.getSession().getAttribute("employee"));
filterChain.doFilter(request,response);
return;
}
log.info("用户未登录");
//5.如果未登录则返回未登录结果,通过输出流方式向客户端页面响应数据
response.getWriter().write(JSON.toJSONString(Result.error("NOTLOGIN")));
return;
}
/**
* 路径匹配,检查本次请求是否需要放行
* @param urls
* @param requestURI
* @return
*/
public boolean check(String[] urls,String requestURI){
//遍历请求路径
for (String url : urls) {
boolean match = PATH_MATCHER.match(url, requestURI);
if(match){
return true; //匹配就返回true,放行
}
}
return false;
}
}
注意:response.getWriter().write(JSON.toJSONString(Result.error("NOTLOGIN")));
NOTLOGIN 与静态资源中…/js/request.js中响应拦截器里msg信息要一致不然刷新到index.html页面不会跳转到登录页面
员工登录成功后,页面跳转到后台系统首页面(backend/indexhtml),此时会显示当前登录用户的姓名:
如果员工需要退出系统,直接点击右侧的退出按钮即可很出系统,退出系统后页面应跳转回登录页面
用户点击页面中退出按钮,发送请求,请求地址为/employee/logout,请求方式为POST。我们只需要在Controller中创建对应的处理方法即可,具体的处理逻辑:
1、清理Session中的用户id
2、返回结果
/**
* 退出登录
* @param request
* @return
*/
@PostMapping("/logout")
public Result<String> logout(HttpServletRequest request){
//清理用户id
request.getSession().removeAttribute("employee");
return Result.success("退出成功");
}
省略
新增用户的用户名设置为unique具有唯一属性,status状态要有默认值1不被禁用
/**
* 新增员工
* @param request
* @param employee
* @return
*/
@PostMapping
public Result<String> save(HttpServletRequest request,@RequestBody Employee employee){
log.info("新增员工,员工信息:{}",employee.toString());
// 在新增员工操作中,对员工的密码进行初始化( MD5加密 )
employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
//下面设置 公共属性的值(createTime、updateTime、createUser、updateUser)交给 MyMetaObjectHandler类处理
employee.setCreateTime(LocalDateTime.now());
employee.setUpdateTime(LocalDateTime.now());
Long empId = (Long) request.getSession().getAttribute("employee");
employee.setCreateUser(empId);
employee.setUpdateUser(empId);
employeeService.save(employee);
return Result.success("成功新增员工");
}
package com.yjq.reggie.common;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import java.sql.SQLIntegrityConstraintViolationException;
// 全局异常处理
// 如果类上加有 @RestController、@Controller注解(annotations的属性值)的类中有方法抛出异常,由GlobalExceptionHander来处理异常
@ControllerAdvice(annotations = {RestController.class, Controller.class})
@ResponseBody // 将结果封装成JSON数据并返回
@Slf4j
public class GlobalExceptionHander {
// 解决 字段username被唯一索引约束的情况下,添加相同的username,抛出SQLIntegrityConstraintViolationException 的全局异常
@ExceptionHandler(SQLIntegrityConstraintViolationException.class)
public Result<String> exceptionHandler(SQLIntegrityConstraintViolationException e){
log.info(e.getMessage());
if (e.getMessage().contains("Duplicate entry")){
String[] split = e.getMessage().split(" ");
String msg = split[2] + "已存在";
return Result.error(msg);
}
return Result.error("操作失败!");
}
}
package com.yjq.reggie.config;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
// 配置MybatisPlus的分页插件
@Configuration // 标注MybatisPlusConfig是一个配置类
public class MybatisPlusConfig {
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor(){
MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();
mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor());
return mybatisPlusInterceptor;
}
}
/**
* 分页展示功能
* @param page
* @param pageSize
* @param name
* @return
*/
// 1、页面发送Ajax请求,将分页查询参数(page、pageSize、name)提交到服务端
// 2、服务端Controller接收页面提交的数据 并调用Service查询数据
// 3、Service调用Mapper操作数据库,查询分页的数据
// 4、Controller将查询的分页数据 响应给页面
// 5、页面接收到分页数据并通过前端(ElementUI)的table组件展示到页面上
@GetMapping("/page")
public Result<Page> pageShow(int page,int pageSize,String name){
log.info("page = {},pageSize = {},name = {}",page,pageSize,name);
// 创建分页构造器对象
Page pageInfo = new Page(page,pageSize);
// 构造条件构造器
LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
// name不为null,才会 比较 getUsername方法和前端传入的name是否匹配 的过滤条件
queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getUsername,name);
// 去数据库查询
employeeService.page(pageInfo,queryWrapper);
return Result.success(pageInfo);
}
}
@PutMapping
// !!!! @RequestBody不要忘
public Result<String> update(HttpServletRequest request,@RequestBody Employee employee){
log.info(employee.toString());
// 下面设置 公共属性的值(createTime、updateTime、createUser、updateUser)交给 MyMetaObjectHandler类处理
Long empId = (Long) request.getSession().getAttribute("employee");
employee.setUpdateTime(LocalDateTime.now());
employee.setUpdateUser(empId);
employeeService.updateById(employee);
return Result.success("员工信息修改成功!");
}
package com.yjq.reggie.common;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import java.math.BigInteger;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import static com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES;
/**
* 对象映射器:基于jackson将Java对象转为json,或者将json转为Java对象
* 将JSON解析为Java对象的过程称为 [从JSON反序列化Java对象]
* 从Java对象生成JSON的过程称为 [序列化Java对象到JSON]
*/
// 将 较大值的Long类型数据 传到前端,可能会造成数值的精度丢失,将Long类型数据转化为字符串再传到前端就可以解决该问题
// 同时,在WebMvcConfig中 添加消息转换方法extendMessageConverters(List> converters)
public class JacksonObjectMapper extends ObjectMapper {
public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";
public JacksonObjectMapper() {
super();
//收到未知属性时不报异常
this.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);
//反序列化时,属性不存在的兼容处理
this.getDeserializationConfig().withoutFeatures(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
SimpleModule simpleModule = new SimpleModule()
.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)))
.addSerializer(BigInteger.class, ToStringSerializer.instance)
.addSerializer(Long.class, ToStringSerializer.instance)
.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
//注册功能模块 例如,可以添加自定义序列化器和反序列化器
this.registerModule(simpleModule);
}
}
…/config/WebMvcConfig.java
/**
* 扩展SpringMvc的消息转换器
* @param converters
*/
@Override
protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
log.info("自定义消息转化器 被调用!");
// 创建消息转换器对象
MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
// 设置对象转换器,底层使用JackSON 将Java对象 转化为JSON
messageConverter.setObjectMapper(new JacksonObjectMapper());
// 将上面的消息转换器对象追加到SpringMVC的 转换器容器 的第一个位置(优先采用下标为 0 位置的消息转换器)
converters.add(0,messageConverter);
}
/**
* 根据id查询员工信息(编辑接口)
* @param id
* @return
*/
@GetMapping("/{id}")
public Result<Employee> getById (@PathVariable Long id) {
log.info("根据id查询员工信息...");
Employee employee = employeeService.getById(id);
if (employee != null) {
return Result.success(employee);
}
return Result.error("没有查询到员工信息");
}
package com.yjq.reggie.entity;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import java.io.Serializable;
import java.time.LocalDateTime;
/**
* 员工实体类
*/
@Data
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
private Long id; //主键
private String username; //用户名
private String name; //账号
private String password; //密码
private String phone; //手机号
private String sex; //性别
/**
* 驼峰命名自动映射sql表中的下划线命名
* application.yml配置文件中配置
*/
private String idNumber; // 身份证号
private Integer status; //状态 0:禁用,1:正常
/**
* 实体类属性上加上@TableField注解,自动填充公共字段
*/
@TableField(fill = FieldFill.INSERT)
private LocalDateTime createTime; //插入时填充字段
@TableField(fill = FieldFill.INSERT_UPDATE)
private LocalDateTime updateTime; //插入和更新时填充字段
@TableField(fill = FieldFill.INSERT)
private Long createUser; //插入时填充字段
@TableField(fill = FieldFill.INSERT_UPDATE)
private Long updateUser; //插入和更新时填充字段
}
这里先将createUser和updateUser的id值写死为1,后面完善功能会用获取的id替换
package com.yjq.reggie.common;
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
@Slf4j
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
/**
* 插入操作,自动填充
* @param metaObject
*/
@Override
public void insertFill(MetaObject metaObject) {
log.info("公共字段自动填充[insert]...");
log.info(metaObject.toString());
metaObject.setValue("createTime", LocalDateTime.now());
metaObject.setValue("updateTime", LocalDateTime.now());
metaObject.setValue("createUser", new Long(1));
metaObject.setValue("updateUser", new Long(1));
}
/**
* 更新操作,自动填充
* @param metaObject
*/
@Override
public void updateFill(MetaObject metaObject) {
log.info("公共字段自动填充[update]...");
log.info(metaObject.toString());
metaObject.setValue("updateTime", LocalDateTime.now());
metaObject.setValue("updateUser", new Long(1));
}
}
把测试日志插入
LoginCheckFiter.java
EmployeeController.java
MyMetaObjectHandler.java程序中,打开修改页面保存看结果
long id = Thread.currentThread().getId();
log.info("线程id:{}",id);
package com.yjq.reggie.common;
/**
* 基于ThreadLocal 封装工具类,用户保存和获取当前登录的用户id
* ThreadLocal以线程为 作用域,保存每个线程中的数据副本
*/
public class BaseContext {
private static ThreadLocal<Long> threadLocal = new ThreadLocal<>();
/**
* 设置当前用户id值
* @param id
*/
public static void setCurrentId(Long id){
threadLocal.set(id);
}
/**
* 获取当前用户id值
* @return
*/
public static Long getCurrentId(){
return threadLocal.get();
}
}
package com.yjq.reggie.common;
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
@Slf4j
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
/**
* 插入操作,自动填充
* @param metaObject
*/
@Override
public void insertFill(MetaObject metaObject) {
log.info("公共字段自动填充[insert]...");
log.info(metaObject.toString());
// long id = Thread.currentThread().getId();
// log.info("线程id:{}",id);
metaObject.setValue("createTime", LocalDateTime.now());
metaObject.setValue("updateTime", LocalDateTime.now());
/**
* 获取当前用户id值
*/
metaObject.setValue("createUser", BaseContext.getCurrentId());
metaObject.setValue("updateUser", BaseContext.getCurrentId());
}
/**
* 更新操作,自动填充
* @param metaObject
*/
@Override
public void updateFill(MetaObject metaObject) {
log.info("公共字段自动填充[update]...");
log.info(metaObject.toString());
// long id = Thread.currentThread().getId();
// log.info("线程id:{}",id);
metaObject.setValue("updateTime", LocalDateTime.now());
metaObject.setValue("updateUser", BaseContext.getCurrentId());
}
}
package com.yjq.reggie.entity;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import java.io.Serializable;
import java.time.LocalDateTime;
/**
* 分类
*/
@Data
public class Category implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
//类型 1 菜品分类 2 套餐分类
private Integer type;
//分类名称
private String name;
//顺序
private Integer sort;
//创建时间
@TableField(fill = FieldFill.INSERT)
private LocalDateTime createTime;
//更新时间
@TableField(fill = FieldFill.INSERT_UPDATE)
private LocalDateTime updateTime;
//创建人
@TableField(fill = FieldFill.INSERT)
private Long createUser;
//修改人
@TableField(fill = FieldFill.INSERT_UPDATE)
private Long updateUser;
// 是否删除(逻辑删除,Category表中没有isDeleted 字段)
// private Integer isDeleted;
}
Mapper接口
package com.yjq.reggie.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.yjq.reggie.entity.Category;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface CategoryMapper extends BaseMapper<Category> {
}
package com.yjq.reggie.service;
import com.baomidou.mybatisplus.extension.service.IService;
import com.yjq.reggie.entity.Category;
public interface CategoryService extends IService<Category> {
}
package com.yjq.reggie.service.impl;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yjq.reggie.entity.Category;
import com.yjq.reggie.mapper.CategoryMapper;
import com.yjq.reggie.service.CategoryService;
import org.springframework.stereotype.Service;
/***
* service实现类 继承mp提供通用的service基类 ServiceImpl
* ServiceImpl
* 2个泛型 1.CategoryMapper Mapper接口
* 2.Category 对应entity(对象、实体)
*/
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
}
package com.yjq.reggie.controller;
import com.yjq.reggie.entity.Category;
import com.yjq.reggie.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
/**
* 分类管理
*/
@Slf4j
@RestController
@RequestMapping("/category")
public class CategoryController {
@Autowired
private CategoryService categoryService;
}
/**
* 新增分类
* @param category
* @return
*/
@PostMapping
public Result<String> save(@RequestBody Category category){
log.info("category: {}",category);
categoryService.save(category);
return Result.success("新增分类成功");
}
/**
* 分页查询
* @param page
* @param pageSize
* @return
*/
@GetMapping("/page")
public Result<Page> pageShow(int page, int pageSize){
log.info("page = {},pageSize = {}",page,pageSize);
// 创建分页构造器对象
Page pageInfo = new Page(page,pageSize);
// 条件构造器
LambdaQueryWrapper<Category> queryWrapper = new LambdaQueryWrapper();
// 根据 Category对象的sort字段 来排序展示
queryWrapper.orderByAsc(Category::getSort);
// 去数据库查询
categoryService.page(pageInfo,queryWrapper);
return Result.success(pageInfo);
}
/**
* 删除分类
* @param id
* @return
*/
@DeleteMapping
public Result<String> deleteById(Long id){
log.info("删除分类,分类id为:{}",id);
categoryService.removeById(id);
return Result.success("删除成功");
}
这里只给Dish和Setmeal的实体类代码,剩下的接口和实现类与之前类似,此处省略
package com.yjq.reggie.entity;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDateTime;
/**
* 菜品分类,id为1
*/
@Data
public class Dish implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
//菜品名称
private String name;
//菜品分类id
private Long categoryId;
//菜品价格,一般存在数据库中 商品价格 往往以 分作为 基本单位(分、角、元)
private BigDecimal price;
//商品码
private String code;
//图片
private String image;
//描述信息
private String description;
//0 停售 1 起售
private Integer status;
//顺序
private Integer sort;
@TableField(fill = FieldFill.INSERT)
private LocalDateTime createTime;
@TableField(fill = FieldFill.INSERT_UPDATE)
private LocalDateTime updateTime;
@TableField(fill = FieldFill.INSERT)
private Long createUser;
@TableField(fill = FieldFill.INSERT_UPDATE)
private Long updateUser;
//是否删除
private Integer isDeleted;
}
package com.yjq.reggie.entity;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDateTime;
/**
* 套餐分类,id为2
*/
@Data
public class Setmeal implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
//分类id
private Long categoryId;
//套餐名称
private String name;
//套餐价格
private BigDecimal price;
//状态 0:停用 1:启用
private Integer status;
//编码
private String code;
//描述信息
private String description;
//图片
private String image;
@TableField(fill = FieldFill.INSERT)
private LocalDateTime createTime;
@TableField(fill = FieldFill.INSERT_UPDATE)
private LocalDateTime updateTime;
@TableField(fill = FieldFill.INSERT)
private Long createUser;
@TableField(fill = FieldFill.INSERT_UPDATE)
private Long updateUser;
//是否删除
private Integer isDeleted;
}
自定义异常类
package com.yjq.reggie.common;
/**
* 自定义异常
*/
public class MyCustomException extends RuntimeException{
//有参构造器
public MyCustomException(String msg){
super(msg);
}
}
在全局处理中处理异常
@ExceptionHandler(MyCustomException.class)
public Result<String> exceptionHandler(MyCustomException e){
log.info(e.getMessage());
return Result.error(e.getMessage());
}
```v
在删除功能中重新调用Service的自定义remove方法
```java
/**
* 删除分类
* @param id
* @return
*/
@DeleteMapping
public Result<String> deleteById(Long id){
log.info("删除分类,分类id为:{}",id);
//categoryService.removeById(id);
categoryService.remove(id);
return Result.success("删除成功");
}
出现bug,属于前后端id名不同导致,多亏弹幕大军
然后在静态资源中找到发现,前端定义的接口参数是ids,而我们controller写的参数是id
刚开始我以为两种方式改变其中任意一个对应上就行,但改前端接口还是不行,所以只能妥协的改掉controller方法里的参数为ids
ps:有知道的大佬还请赐教
/**
* 删除分类
* @param ids
* @return
*/
@DeleteMapping
public Result<String> deleteById(Long ids){
log.info("删除分类,分类id为:{}",ids);
//categoryService.removeById(id);
categoryService.remove(ids);
return Result.success("删除成功");
}
/**
* 根据id修改功能
* @param category
* @return
*/
@PutMapping
public Result<String> update(@RequestBody Category category){
log.info("修改分类信息:{}",category);
categoryService.updateById(category);
return Result.success("分类信息 修改成功!");
}
服务端文件上传
两种方式:
1.在过滤器中添加放行路径
2.先登录再打开上传界面
package com.yjq.reggie.controller;
import com.yjq.reggie.common.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;
@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {
@Value("${upload.filePath}")
private String basePath;
// 文件上传
@PostMapping("/upload")
public Result<String> upload(MultipartFile file){
// file是一个临时文件,需要转存到磁盘中的某个指定位置,否则本次请求完成后,临时文件file会删除
// upload方法名中的参数名 必须是file(文件上传表单的 中name属性值必须是file,name="file")
log.info("上传的文件为: "+file.toString());
// 原始文件名
String originFileName = file.getOriginalFilename(); // 设 fileName为 abc.jpg
String suffix = originFileName.substring(originFileName.lastIndexOf(".")); // suffix = .jpg
// 使用UUID重新生成文件名,防止文件名重复,造成后面上传的文件覆盖前面上传的文件
String fileName = UUID.randomUUID().toString() + suffix;
// 创建一个目录对象 dir
File dir = new File(basePath);
if (!dir.exists()){
dir.mkdirs();
}
try {
// 将临时文件转存到指定 位置
file.transferTo(new File(basePath + fileName));
} catch (IOException e) {
e.printStackTrace();
}
return Result.success(fileName);
}
// 文件下载 download
@GetMapping("/download")
public void download(String name, HttpServletResponse response) {
try {
// 通过输入流来读取文件内容
FileInputStream fileInputStream = new FileInputStream(new File(basePath +name));
// 通过输出流将文件写回到浏览器,并在浏览器展示图片
ServletOutputStream outputStream = response.getOutputStream();
response.setContentType("image/jpeg");
int len = 0;
byte[] bytes = new byte[1024];
// 输入流读取到 内容放到 bytes数组中
while((len = fileInputStream.read(bytes)) != -1){ // 输入流还没有读取完数据
outputStream.write(bytes,0,len);
outputStream.flush();
}
fileInputStream.close();
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
…/controller/CatergoryController
// 根据条件查询分类数据
@GetMapping("/list")
public Result<List<Category>> categoryList(Category category){
LambdaQueryWrapper<Category> queryWrapper = new LambdaQueryWrapper<>();
// 只有当 category.getType()不为空,才会比较 前端传入的category的type和 实体类中 type属性是否相等
queryWrapper.eq(category.getType() != null, Category::getType,category.getType());
queryWrapper.orderByAsc(Category::getSort).orderByDesc(Category::getUpdateTime);
List<Category> list = categoryService.list(queryWrapper);
return Result.success(list);
}
// 前端传输到服务端的数据 和实体类中的属性 不是一一对应关系,
// 需要用到DTO(Data Transfer Object)对象,即数据传输对象,一般用于Controller和Service层之间的数据传输
DishDTo实体类(原来的Dish实体类中没有菜品口味的name和value属性)
package com.yjq.reggie.dto;
import com.yjq.reggie.entity.Dish;
import com.yjq.reggie.entity.DishFlavor;
import lombok.Data;
import java.util.ArrayList;
import java.util.List;
// 前端传输到服务端的数据 和实体类中的属性 不是一一对应关系,
// 需要用到DTO(Data Transfer Object)对象,即数据传输对象,一般用于Controller和Service层之间的数据传输
@Data
public class DishDto extends Dish {
// Dish 不符合前端传过来的数据,需要将其转化为DishDto
// flavors: 菜品对应的口味数据
private List<DishFlavor> flavors = new ArrayList<>();
private String categoryName;
private Integer copies;
}
在接口中自定义方法(操作两张表)
package com.yjq.reggie.service;
import com.baomidou.mybatisplus.extension.service.IService;
import com.yjq.reggie.dto.DishDto;
import com.yjq.reggie.entity.Dish;
public interface DishService extends IService<Dish> {
// // 新增菜品,同时插入菜品对应的数据,需要操作两张表: dish、dish_flavor
public void saveWithFlavor(DishDto dishDto);
}
实现类重写方法
package com.yjq.reggie.service.impl;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yjq.reggie.dto.DishDto;
import com.yjq.reggie.entity.Dish;
import com.yjq.reggie.entity.DishFlavor;
import com.yjq.reggie.mapper.DishMapper;
import com.yjq.reggie.service.DishFlavorService;
import com.yjq.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
import java.util.stream.Collectors;
@Slf4j
@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
@Autowired
private DishService dishService;
@Autowired
private DishFlavorService dishFlavorService;
/**
*新增菜品,同时保存对应的口味数据
* @param dishDto
*/
// 由于涉及到对dish、dish_flavor两张表的操作,应该使用 @Transactional 来标注事务
// 要让@Transactional 生效,还需在启动类添加@EnableTransactionManagement 来开启事务
@Transactional
public void saveWithFlavor(DishDto dishDto) {
//保存菜品的基本信息到菜品表dish
this.save(dishDto);
//保存菜品口味数据到菜品口味表dish_flavor
Long dishId = dishDto.getId(); //菜品Id
//菜品口味
List<DishFlavor> flavors = dishDto.getFlavors();
flavors = flavors.stream().map((flavor)->{
flavor.setDishId(dishId);
return flavor;
}).collect(Collectors.toList());
dishFlavorService.saveBatch(flavors);
}
}
方法一:通过流的方式
List<DishFlavor> flavors = dishDto.getFlavors();
flavors = flavors.stream().map((item) -> {
item.setDishId(dishId);
return item;
}).collect(Collectors.toList());
方法二:通过forEach
List<DishFlavor> flavors = dishDto.getFlavors();
flavors.forEach(item -> item.setDishId(dishId));
最后在DishController中的save方法中调用自定义方法
/**
* 新增菜品
* @param dishDto
* @return
*/
@PostMapping
public Result<String> save(@RequestBody DishDto dishDto) {
log.info(dishDto.toString());
dishService.saveWithFlavor(dishDto);
return Result.success("新增菜品操作成功");
}
// 分页展示菜品信息
@GetMapping("/page")
// dish/page?page=1&pageSize=10&name=122334,name 是搜索框中的输入值
public Result<Page> pageShow(int page,int pageSize,String name){
Page pageInfo = new Page(page,pageSize);
LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
// 添加过滤条件
queryWrapper.like(name != null,Dish::getName,name);
queryWrapper.orderByDesc(Dish::getUpdateTime);
// 执行分页查询
dishService.page(pageInfo,queryWrapper);
return Result.success(pageInfo);
}
菜品分类一栏没有显示,可以看到后端返回的是categoryId,应该返回categoryName菜品名称
/**
* 分页展示菜品信息
* @param page
* @param pageSize
* @param name
* @return
*/
@GetMapping("/page")
// dish/page?page=1&pageSize=10&name=122334,name 是搜索框中的输入值
public Result<Page> pageShow(int page,int pageSize,String name){
// 构造分页构造器对象
Page<Dish> dishPage = new Page(page,pageSize);
Page<DishDto> dtoPage = new Page<>();
// 条件构造器
LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
// 添加过滤条件
queryWrapper.like(name != null,Dish::getName,name);
// 添加排序条件
queryWrapper.orderByDesc(Dish::getUpdateTime);
// 执行分页查询
dishService.page(dishPage,queryWrapper);
// 将 dish 中的属性值复制到 dtoPage,但是忽略 records
// records需要另外去设置
BeanUtils.copyProperties(dishPage,dtoPage,"records"); //忽略records,因为dishPage的records数据中不包括菜品名称categoryName
List<Dish> records = dishPage.getRecords();
List<DishDto> dtoList = records.stream().map((dish) -> { // dish 为每个菜品对象
DishDto dishDto = new DishDto();
BeanUtils.copyProperties(dish,dishDto);
Long categoryId = dish.getCategoryId(); // 菜品的分类id
Category category = categoryService.getById(categoryId); //根据菜品分类的id得到菜品对象
if (category != null){
dishDto.setCategoryName(category.getName()); //根据菜品得到菜品名称
}
return dishDto;
}).collect(Collectors.toList());
dtoPage.setRecords(dtoList); //将包含菜品名称的list赋给dtoPage
return Result.success(dtoPage);
}
修改前数据回显
回显数据涉及两个表的数据,到DishService中自定义get方法(获取dish表中基本信息以及dish_flavor中对应的口味信息)
这里使用DishDto为返回对象类型,与页面数据对应
// 根据dishId查询 菜品信息和口味信息
public DishDto getByDishIdWithFlavor(Long dishId);
/**
* 根据id查询菜品信息和对应的口味信息
* @param dishId
* @return
*/
@Override
public DishDto getByDishIdWithFlavor(Long dishId) {
// 只是关联查询两张表,没有涉及事务,不用加 @Transactional
// 从dish表中查询 菜品的基本信息
Dish dish = this.getById(dishId);
DishDto dishDto = new DishDto();
BeanUtils.copyProperties(dish,dishDto);
// 从dish_flavor表查询 当前菜品对应的口味信息
LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
queryWrapper.eq(DishFlavor::getDishId,dishId);
List<DishFlavor> list = dishFlavorService.list(queryWrapper);
dishDto.setFlavors(list);
return dishDto;
}
/**
* 根据id查询菜品信息和对应的口味信息
* @param id
* @return
*/
@GetMapping("/{id}")
public Result<DishDto> get(@PathVariable Long id){
DishDto dishDto = dishService.getByDishIdWithFlavor(id);
return Result.success(dishDto);
}
回显后修改保存
package com.yjq.reggie.entity;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDateTime;
/**
* 套餐菜品关系
*/
@Data
public class SetmealDish implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
//套餐id
private Long setmealId;
//菜品id
private Long dishId;
//菜品名称 (冗余字段)
private String name;
//菜品原价
private BigDecimal price;
//菜品的份数
private Integer copies;
//排序
private Integer sort;
@TableField(fill = FieldFill.INSERT)
private LocalDateTime createTime;
@TableField(fill = FieldFill.INSERT_UPDATE)
private LocalDateTime updateTime;
@TableField(fill = FieldFill.INSERT)
private Long createUser;
@TableField(fill = FieldFill.INSERT_UPDATE)
private Long updateUser;
//是否删除
private Integer isDeleted;
}
SetmealDto 继承 Setmeal套餐的基本属性,
另外根据前端页面需求数据添加了特有属性
package com.yjq.reggie.dto;
import com.yjq.reggie.entity.Setmeal;
import com.yjq.reggie.entity.SetmealDish;
import lombok.Data;
import java.util.List;
@Data
public class SetmealDto extends Setmeal {
//新增套餐中自选菜品的集合
private List<SetmealDish> setmealDishes;
//设置分页查询页面的套餐分类名称
private String categoryName;
}
接口和控制层省略…
1-2.套餐分类和菜品分类的数据获取(CategoryController中处理过)
3.在DishController中
/**
* 套餐管理/新增套餐/
* 添加菜品功能中根据套餐id查询相应的菜品
* @param dish
* @return
*/
@GetMapping("/list")
public Result<List<Dish>> list(Dish dish){
//构造条件查询
LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//等值查询
queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//必须是起售的菜品才显示
queryWrapper.eq(Dish::getStatus,1);
//排序条件:根据sort升序排,根据更新时间降序排
queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
List<Dish> dishList = dishService.list(queryWrapper);
return Result.success(dishList);
}
4-5.图片上传下载也已经处理过了
6.需要自定义保存方法
(原因:只操作setmeal表,套餐中的菜品信息无法保存)
在SetmealService中自定义保存方法,调用setmeal和seatmeal_dish表
/**
* 新增套餐,同时需要保存套餐和菜品的关联关系
* @param setmealDto
*/
@Transactional
public void saveWithDish(SetmealDto setmealDto) {
//保存套餐的基本信息,操作setmeal,执行insert操作
this.save(setmealDto);
//保存套餐和菜品的关联关系,操作setmeal_dish,执行insert操作
List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
setmealDishes.stream().map((item)->{
//setmealDto.getId()就是setmeal表中每次创建一个新的套餐分类自动生成的id
//setSetmealId是SetmealDish套餐菜品关系中的setmealId属性,对应setmeal_dish表中的setmeal_id
//新增套餐下的自选菜品的每个setmeal_id都会在setmeal表中的id中找到对应,大家想不通的去数据库看这两个表
item.setSetmealId(setmealDto.getId());
return item;
}).collect(Collectors.toList());
//保存套餐和菜品的关联信息,操作setmeal_dish,执行insert操作
setmealDishService.saveBatch(setmealDishes);
}
可选菜品展示
保存功能
setmeal套餐表
setmeal_dish套餐菜品关联表
/**
* 套餐管理分页信息展示页面
* @param page
* @param pageSize
* @return
*/
@GetMapping("/page")
// http://localhost:8080/setmeal/page?page=1&pageSize=10&name=123
public Result<Page> pageShow(int page,int pageSize,String name){
Page<Setmeal> mealPage = new Page<>(page,pageSize);
Page<SetmealDto> dtoPage = new Page<>(); //为了展示 套餐分类 名称 categoryName
LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
//分页展示面,模糊查询
queryWrapper.like(name != null,Setmeal::getName,name);
//根据更新时间降序排列
queryWrapper.orderByDesc(Setmeal::getUpdateTime);
setmealService.page(mealPage,queryWrapper);
/* 上面可以展示套餐基本信息,除套餐分类 展示列*/
//将Setmeal中的属性复制到dtoPage,但是忽略records
BeanUtils.copyProperties(mealPage,dtoPage,"records");
List<Setmeal> records = mealPage.getRecords();
List<SetmealDto> dtoList = records.stream().map((setmeal)->{
SetmealDto setmealDto = new SetmealDto();
BeanUtils.copyProperties(setmeal,setmealDto);
//套餐分类id
Long categoryId = setmeal.getCategoryId();
//根据套餐分类id获得套餐分类对象
Category category = categoryService.getById(categoryId);
if(category != null){
setmealDto.setCategoryName(category.getName());
}
return setmealDto;
}).collect(Collectors.toList());
dtoPage.setRecords(dtoList);
return Result.success(dtoPage);
}
官网注册——>控制台——>云通信
了解即可,签名申请需要三证合一比较繁琐
模板详情
Java SDK使用手册
<!--导入短信发送所需maven坐标-->
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-core</artifactId>
<version>4.5.16</version>
</dependency>
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-dysmsapi</artifactId>
<version>2.1.0</version>
</dependency>
package com.yjq.reggie.entity;
import lombok.Data;
import java.io.Serializable;
/**
* 用户信息
*/
@Data
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
//姓名
private String name;
//手机号
private String phone;
//性别 0 女 1 男
private String sex;
//身份证号
private String idNumber;
//头像
private String avatar;
//状态 0:禁用,1:正常
private Integer status;
}
package com.yjq.reggie.utils;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.dysmsapi.model.v20170525.SendSmsRequest;
import com.aliyuncs.dysmsapi.model.v20170525.SendSmsResponse;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.profile.DefaultProfile;
import com.google.gson.Gson;
import com.sun.xml.internal.ws.resources.SenderMessages;
/**
* 短信发送工具类
*/
public class SMSUtils {
/**
* 发送短信
* @param signName 签名
* @param templateCode 模板
* @param phoneNumber 手机号
* @param param 参数
*/
public static void sendMessage(String signName,String templateCode,String phoneNumber,String param){
//构建一个阿里云客户端, 用于发起请求。
//构建阿里云客户端时需要设置AccessKey ID和AccessKey Secret。
DefaultProfile profile = DefaultProfile.getProfile("cn-hangzhou", "" , "" );
IAcsClient client = new DefaultAcsClient(profile);
//构建请求,设置请求参数。
SendSmsRequest request = new SendSmsRequest();
request.setSysRegionId("cn-hangzhou");
request.setPhoneNumbers(phoneNumber);
request.setSignName(signName);
request.setTemplateCode(templateCode);
request.setTemplateParam("{\"code\":\""+param+"\"}");
try {
SendSmsResponse response = client.getAcsResponse(request);
System.out.println("短信发送成功");
} catch (ClientException e) {
e.printStackTrace();
}
}
}
package com.yjq.reggie.utils;
import java.util.Random;
/**
* 随机生成验证码工具类
*/
public class ValidateCodeUtils {
/**
* 随机生成验证码
* @param length 长度为4位或者6位
* @return
*/
public static Integer generateValidateCode(int length){
Integer code =null;
if(length == 4){
code = new Random().nextInt(9999);//生成随机数,最大为9999
if(code < 1000){
code = code + 1000;//保证随机数为4位数字
}
}else if(length == 6){
code = new Random().nextInt(999999);//生成随机数,最大为999999
if(code < 100000){
code = code + 100000;//保证随机数为6位数字
}
}else{
throw new RuntimeException("只能生成4位或6位数字验证码");
}
return code;
}
/**
* 随机生成指定长度字符串验证码
* @param length 长度
* @return
*/
public static String generateValidateCode4String(int length){
Random rdm = new Random();
String hash1 = Integer.toHexString(rdm.nextInt());
String capstr = hash1.substring(0, length);
return capstr;
}
}