Springboot+mybatis+mysql

环境-版本
jdk 1.8.0_152
maven 3.5.2
mysql 5.5.40
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1.选择Spring Initializr。选择后点击Next
创建
2.把项目信息写好,点击Next;
取个名字
3.选择web勾选设置
  选择template勾选设置
  选择SQL勾选设置
搭建所需要依赖
4.选择finish
创建
5.配置maven
配置

配置2
6.搭建
搭建
7.需要加入的代码如下:
  
        
            com.github.pagehelper
            pagehelper-spring-boot-starter
            1.2.5
        
        
        
            com.alibaba
            druid-spring-boot-starter
            1.1.9
        



        

            
            
                
                org.mybatis.generator
                mybatis-generator-maven-plugin
                1.3.2
                
                    
                    src/test/resources/config/generatorConfig.xml
                    
                    true
                    
                    true
                
            

            
                org.springframework.boot
                spring-boot-maven-plugin
            

        
        
            
                src/main/java
                
                    **/*.xml
                
            
        
    
8.application.properties代码如下:
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#配置端口
server.port=8080

#外网地址
spring.datasource.url=jdbc:mysql://localhost:8080?serverTimezone=Asia/Shanghai&useSSL=false&useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.initialSize=20
spring.datasource.minIdle=20
spring.datasource.maxActive=200
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20


#配置这句话,控制台输出sql语句
mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl 
mybatis.mapper-locations= classpath:mapper/*.xml
mybatis.type-aliases-package=com.example.springbootdemo.model
9.index页面创建
创建页面

目录结构

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10.首先建用户表
建用户表
10.mybatis配置
1.在resources文件夹下建立config文件夹,并创建mybatis-config.xml,代码如下:



    
        
    


2.在resources文件夹下建立mapper文件夹,并创建UserMapper.xml,代码如下:



    
        
        
        
        
        
        
        
        
    

    


3.application.properties配置文件代码如下:
#配置端口
server.port=8080

#外网地址
#spring.datasource.url=jdbc:mysql://120.27.21.82:8036/qian?serverTimezone=Asia/Shanghai&useSSL=false&useUnicode=true&characterEncoding=utf-8
#spring.datasource.username=root
#spring.datasource.password=123456
#spring.datasource.driverClassName=com.mysql.jdbc.Driver

spring.datasource.url=jdbc:mysql://120.27.21.82:8036/qian?characterEncoding=utf-8&useSSL=true&serverTimezone=GMT
spring.datasource.username=root
spring.datasource.password=qyw5203344
spring.datasource.driver-class-name= com.mysql.cj.jdbc.Driver
spring.datasource.initialSize=20
spring.datasource.minIdle=20
spring.datasource.maxActive=200
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
mybatis.config-location=classpath:config/mybatis-config.xml
mybatis.mapper-locations= classpath:mapper/*.xml

在pom.xml文件内将依赖改成compile就行


修改

11.首先创建实体类
在com.example.yvans下建立model包,并在该包下建立User类

package com.example.yvans.model;

public class User {
 private int id;
 private String username;
 private String password;
 private String name;
 private String phone;
 private String email;
 private int roleId;
 private String locked;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getRoleId() {
        return roleId;
    }

    public void setRoleId(int roleId) {
        this.roleId = roleId;
    }

    public String getLocked() {
        return locked;
    }

    public void setLocked(String locked) {
        this.locked = locked;
    }
}

12.mapper
在com.example.yvans下建立mapper包,并在该包下建立UserMapper接口

public interface UserMapper {
    int insert(User user);
    List selectUsers();
}

13.Service层,这里是实现层还有一个接口层不写了

package com.example.yvans.service.impl;

import com.example.yvans.mapper.UserMapper;
import com.example.yvans.model.User;
import com.example.yvans.service.UserService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

@Service
public class UserServiceImpl implements UserService {
    @Resource
    private UserMapper userMapper;
    @Override
    public int addUser(User user) {
        int insert = userMapper.insert(user);
        return insert;

    }

    /*
     * 这个方法中用到了我们开头配置依赖的分页插件pagehelper
     * 很简单,只需要在service层传入参数,然后将参数传递给一个插件的一个静态方法即可;
     * pageNum 开始页数
     * pageSize 每页显示的数据条数
     * */
    @Override
    public PageInfo findAllUser(int pageNum, int pageSize) {
        //将参数传给这个方法就可以实现物理分页了,非常简单。
        PageHelper.startPage(pageNum, pageSize);
        List userDomains = userMapper.selectUsers();
        PageInfo result = new PageInfo(userDomains);
        return result;
    }
}

14.controller控制器
在com.example.yvans下建立controller包,并在该包下建立UserController类

package com.example.yvans.controller;

import com.example.yvans.model.User;
import com.example.yvans.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

@Controller
@RequestMapping(value = "/user")
public class UserController {
    @Autowired
    private UserService userService;

    @ResponseBody
    @PostMapping("/add")
    public int addUser(User user) {
        return userService.addUser(user);
    }

    @ResponseBody
    @GetMapping("/all")
    public Object findAllUser(@RequestParam(name = "pageNum", required = false, defaultValue = "1") int pageNum,
                              @RequestParam(name = "pageSize", required = false, defaultValue = "10") int pageSize) {
        return userService.findAllUser(pageNum, pageSize);
    }
}
15.启动类
@SpringBootApplication
@MapperScan("com.example.yvans.mapper")
public class YvansApplication {

    public static void main(String[] args) {
        SpringApplication.run(YvansApplication.class, args);
    }
}

结构:


image.png

请求结果:


image.png

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