SpringBoot2.2.1.RELEASE+MyBatis-Plus3.0.5使用教程
注解
逻辑删除
@TableLogic
private Integer isDeleted;
pom文件
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.2.1.RELEASEversion>
<relativePath/>
parent>
<dependency>
<groupId>org.apache.velocitygroupId>
<artifactId>velocity-engine-coreartifactId>
dependency>
<dependency>
<groupId>io.springfoxgroupId>
<artifactId>springfox-swagger2artifactId>
dependency>
<dependency>
<groupId>io.springfoxgroupId>
<artifactId>springfox-swagger-uiartifactId>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
dependency>
<dependency>
<groupId>org.apache.poigroupId>
<artifactId>poiartifactId>
dependency>
<dependency>
<groupId>org.apache.poigroupId>
<artifactId>poi-ooxmlartifactId>
dependency>
<dependency>
<groupId>commons-fileuploadgroupId>
<artifactId>commons-fileuploadartifactId>
dependency>
<dependency>
<groupId>org.apache.httpcomponentsgroupId>
<artifactId>httpclientartifactId>
dependency>
<dependency>
<groupId>commons-iogroupId>
<artifactId>commons-ioartifactId>
dependency>
<dependency>
<groupId>com.google.code.gsongroupId>
<artifactId>gsonartifactId>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
dependency>
插件
@Configuration
@EnableTransactionManagement
@MapperScan("com.shengun.eduservice.mapper")
public class MyBatisPlusConfig {
/**
* 逻辑删除插件
*/
@Bean
public ISqlInjector sqlInjector() {
return new LogicSqlInjector();
}
/**
* 分页插件
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
return new PaginationInterceptor();
}
}
自动注入
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
@Override
public void insertFill(MetaObject metaObject) {
//参数1：对应类中的属性名称
this.setFieldValByName("gmtCreate", new Date(), metaObject);
this.setFieldValByName("gmtModified", new Date(), metaObject);
}
@Override
public void updateFill(MetaObject metaObject) {
this.setFieldValByName("gmtModified", new Date(), metaObject);
}
}
实操
mybatis-plus 逆向生成代码
package com.achang.eduservice;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import org.junit.Test;
/**
* @阿昌
*/
public class CodeGenerator {
@Test
public void run() {
// 1、创建代码生成器
AutoGenerator mpg = new AutoGenerator();
// 2、全局配置
GlobalConfig gc = new GlobalConfig();
String projectPath = System.getProperty("user.dir");
gc.setOutputDir("F:\\Java\\idea-workpace\\guli-parent\\service\\service-edu" + "/src/main/java"); //输出目录
gc.setAuthor("shengun"); //作者名
gc.setOpen(false); //生成后是否打开资源管理器
gc.setFileOverride(false); //重新生成时文件是否覆盖
gc.setServiceName("%sService"); //去掉Service接口的首字母I
gc.setIdType(IdType.ID_WORKER_STR); //主键策略
gc.setDateType(DateType.ONLY_DATE);//定义生成的实体类中日期类型
gc.setSwagger2(true);//开启Swagger2模式
mpg.setGlobalConfig(gc);
// 3、数据源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setUrl("jdbc:mysql://localhost:3306/guli?serverTimezone=GMT%2B8");
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("root");
dsc.setDbType(DbType.MYSQL);
mpg.setDataSource(dsc);
// 4、包配置
PackageConfig pc = new PackageConfig();
//生成包：com.achang.eduservice
pc.setModuleName("eduservice"); //模块名
pc.setParent("com.shengun");
//生成包：com.achang.controller
pc.setController("controller");
pc.setEntity("entity");
pc.setService("service");
pc.setMapper("mapper");
mpg.setPackageInfo(pc);
// 5、策略配置
StrategyConfig strategy = new StrategyConfig();
strategy.setInclude("edu_teacher");//根据数据库哪张表生成，有多张表就加逗号继续填写
strategy.setNaming(NamingStrategy.underline_to_camel);//数据库表映射到实体的命名策略
strategy.setTablePrefix(pc.getModuleName() + "_"); //生成实体时去掉表前缀
strategy.setColumnNaming(NamingStrategy.underline_to_camel);//数据库表字段映射到实体的命名策略
strategy.setEntityLombokModel(true); // lombok 模型 @Accessors(chain = true) setter链式操作
strategy.setRestControllerStyle(true); //restful api风格控制器
strategy.setControllerMappingHyphenStyle(true); //url中驼峰转连字符
mpg.setStrategy(strategy);
// 6、执行
mpg.execute();
}
}
注解
实体类
@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@ApiModel(value="EduTeacher对象", description="讲师")
public class EduTeacher implements Serializable {
private static final long serialVersionUID = 1L;
@ApiModelProperty(value = "讲师ID")
@TableId(value = "id", type = IdType.ID_WORKER_STR)
private String id;
@ApiModelProperty(value = "讲师姓名")
private String name;
@ApiModelProperty(value = "讲师简介")
private String intro;
@ApiModelProperty(value = "讲师资历,一句话说明讲师")
private String career;
@ApiModelProperty(value = "头衔 1高级讲师 2首席讲师")
private Integer level;
@ApiModelProperty(value = "讲师头像")
private String avatar;
@ApiModelProperty(value = "排序")
private Integer sort;
@ApiModelProperty(value = "逻辑删除 1（true）已删除， 0（false）未删除")
@TableLogic
private Integer isDeleted;
@ApiModelProperty(value = "创建时间")
@TableField(fill = FieldFill.INSERT)
private Date gmtCreate;
@TableField(fill = FieldFill.INSERT_UPDATE)
@ApiModelProperty(value = "更新时间")
private Date gmtModified;
}
mapper
@Repository
public interface EduTeacherMapper extends BaseMapper<EduTeacher> {
}
mapper.xml
DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.shengun.eduservice.mapper.EduTeacherMapper">
mapper>
service
public interface EduTeacherService extends IService<EduTeacher> {
public void pageQuery(Page<EduTeacher> pageParam, TeacherQuery teacherQuery);
}
serviceImpl
@Service
public class EduTeacherServiceImpl extends ServiceImpl<EduTeacherMapper, EduTeacher> implements EduTeacherService {
@Autowired
private EduTeacherMapper eduTeacherMapper;
@Override
public void pageQuery(Page<EduTeacher> pageParam, TeacherQuery teacherQuery) {
//构建查询条件
QueryWrapper<EduTeacher> queryWrapper = new QueryWrapper<>();
//取出值
String name = teacherQuery.getName();
Integer level = teacherQuery.getLevel();
String begin = teacherQuery.getBegin();
String end = teacherQuery.getEnd();
//判断条件是否为空，如果为空，就不拼接
if(!StringUtils.isEmpty(name)){
queryWrapper.like("name", name); // like
}
if(!StringUtils.isEmpty(level)){
queryWrapper.eq("level", level); //=
}
if(!StringUtils.isEmpty(begin)){
queryWrapper.ge("gmt_create", begin); //>=
}
if(!StringUtils.isEmpty(end)){
queryWrapper.le("gmt_modified", end); // <=
}
//带上查询条件分页查询
eduTeacherMapper.selectPage(pageParam, queryWrapper);
}
}
controller
package com.shengun.eduservice.controller;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.shengun.commonutils.R;
import com.shengun.eduservice.entity.EduTeacher;
import com.shengun.eduservice.entity.vo.TeacherQuery;
import com.shengun.eduservice.service.EduTeacherService;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
/**
*
* 讲师 前端控制器
*
* 访问url: http://localhost:8001/eduservice/edu-teacher/xxxx
* @author shengun
* @since 2022-03-26
*/
@RestController
@RequestMapping("/eduservice/edu-teacher")
@Slf4j
@ApiModel(value="教师管理",description = "讲师管理")
public class EduTeacherController {
@Autowired
private EduTeacherService eduTeacherService;
/**
* 查询讲师所有数据
* @return 所有讲师数据
*/
@ApiOperation(value="所有讲师列表")
@GetMapping("/findAll")
public R list(){
List<EduTeacher> list = eduTeacherService.list(null);
return R.ok().data("items", list);
}
/**
* 根据ID删除讲师记录
* @param id 删除讲师ID
* @return 是否成功删除讲师
*/
@ApiOperation(value ="根据ID删除讲师")
@DeleteMapping("/{id}")
public R deleteTeacherById(@ApiParam(value="讲师ID") @PathVariable("id") String id) {
log.info("##########获取要删除id值：" + id);
return eduTeacherService.removeById(id) ? R.ok() : R.error();
}
/**
* 分页讲师列表
* @param current 当前页码
* @param limit 每页记录数
* @return 返回分页查询记录和总记录数
*/
@GetMapping("/pageList/{current}/{limit}")
@ApiOperation(value = "分页讲师列表")
public R pageList(@ApiParam(name = "current", value = "当前页码", required = true) @PathVariable("current") Long current,
@ApiParam(name = "limit", value = "每页记录数", required = true) @PathVariable("limit") Long limit) {
//查询分页
Page<EduTeacher> pageParam = new Page<>(current, limit);
//分页查询，查完后，会将数据封装在pageParam中
eduTeacherService.page(pageParam, null);
//获得记录数
List<EduTeacher> records = pageParam.getRecords();
//获取总记录数
long total = pageParam.getTotal();
return R.ok().data("total", total).data("rows", records);
}
/**
* 多条件查询讲师带分页 GET方法
* @param current 当前页码
* @param limit 每页记录数
* @param teacherQuery 多条件
* @return 多条件查询的记录
*/
@ApiOperation(value = "多条件查询讲师带分页GET")
@GetMapping("/pageTeacherConditionGet/{current}/{limit}")
public R pageTeacherConditionGet(@ApiParam(name = "current", value = "当前页码", required = true) @PathVariable("current") Long current,
@ApiParam(name = "limit", value = "每页记录数", required = true) @PathVariable("limit") Long limit,
TeacherQuery teacherQuery){
Page<EduTeacher> pageParam = new Page<>();
eduTeacherService.pageQuery(pageParam, teacherQuery);
//报错
int i = 10/0;
//获取查询到的数据
List<EduTeacher> records = pageParam.getRecords();
//获取总记录数
long total = pageParam.getTotal();
return R.ok().data("total",total).data("rows",records);
}
/**
* 多条件查询讲师带分页 POST方法
* @param current 当前页码
* @param limit 每页记录数
* @param teacherQuery 多条件
* @return 多条件查询的记录 json数据
*/
@ApiOperation(value = "多条件查询讲师带分页POST")
@PostMapping("/pageTeacherConditionPost/{current}/{limit}")
public R pageTeacherConditionPost(@ApiParam(name = "current", value = "当前页码", required = true) @PathVariable("current") Long current,
@ApiParam(name = "limit", value = "每页记录数", required = true) @PathVariable("limit") Long limit,
@RequestBody(required = false) TeacherQuery teacherQuery){
Page<EduTeacher> pageParam = new Page<>();
eduTeacherService.pageQuery(pageParam, teacherQuery);
//获取查询到的数据
List<EduTeacher> records = pageParam.getRecords();
//获取总记录数
long total = pageParam.getTotal();
return R.ok().data("total",total).data("rows",records);
}
/**
* 新增讲师
* @param eduTeacher 讲师jsOn
* @return 返回是否成功新增结果
*/
@ApiOperation(value="新增讲师")
@PostMapping("/save")
public R save(@RequestBody EduTeacher eduTeacher){
boolean save = eduTeacherService.save(eduTeacher);
return save ? R.ok() : R.error();
}
/**
* 根据id查询记录
* @param id 教师id
* @return 返回查询记录
*/
@GetMapping("{id}")
@ApiOperation(value="根据id查询")
public R getById(@PathVariable("id") String id) {
EduTeacher eduTeacher = eduTeacherService.getById(id);
return R.ok().data("item", eduTeacher);
}
/**
* 根据ID修改教师信息
* @param eduTeacher 教师json
* @return 是否修改成功
*/
@ApiOperation(value="根据ID修改教师信息")
@PostMapping("/updateById")
public R updateById(@RequestBody EduTeacher eduTeacher){
boolean flag = eduTeacherService.updateById(eduTeacher);
return flag?R.ok():R.error();
}
}