spring boot2 整合（一）Mybatis （特别完整！）

大概介绍下流程：

借助idea实现mybatis逆向工程
用xml配置实现整合
用cmd命令行实现mybatis逆向工程
用mapping.xml配置实现数据交互
用注解的方式实现数据交互

首先我的开发环境：
jdk1.8+maven3+IDEA

1. mybatis逆向攻城

逆向工程方式很多，我目前接触到的就两种，一种是借助于ide开发工具，一种是在cmd中执行命令。（其实二者原理都一样，都是执行maven的generator命令，具体请看下文）。

1. 完善pom文件

<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion><groupId>springboot-mybatis</groupId><artifactId>springboot-mybatis</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>springboot-mybatis</name><description>Demo project for Spring Boot</description><parent><groupId>springboot-integration</groupId><artifactId>springboot-integration</artifactId><version>1.0-SNAPSHOT</version></parent> <!-- Add typical dependencies for a web application --><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.0</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.35</version></dependency> <!-- alibaba的druid数据库连接池 --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.11</version></dependency> <!-- alibaba的druid数据库连接池 --><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>1.1.0</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><scope>test</scope></dependency> <!-- 分页插件 --><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId><version>5.0.4</version></dependency></dependencies> <!-- Package as an executable jar --><build><finalName>springboot-mybatis</finalName><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-surefire-plugin</artifactId><configuration><testFailureIgnore>true</testFailureIgnore></configuration></plugin><plugin><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-maven-plugin</artifactId><version>1.3.2</version><configuration><verbose>true</verbose><overwrite>true</overwrite></configuration></plugin></plugins></build>
</project>

pom.xml

2. 逆向所需配置文件generatorConfig.xml

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC"-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN""http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration> <!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包--><classPathEntry location="E:\lib\mysql_driver\mysql-connector-java-5.1.26-bin.jar"/><context id="DB2Tables" targetRuntime="MyBatis3"><commentGenerator><property name="suppressDate" value="true"/> <!-- 是否去除自动生成的注释 true：是 ： false:否 --><property name="suppressAllComments" value="true"/></commentGenerator> <!--数据库链接URL，用户名、密码 --><jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/user" userId="root"password="root"></jdbcConnection><javaTypeResolver><property name="forceBigDecimals" value="false"/></javaTypeResolver> <!-- 生成模型的包名和位置--><javaModelGenerator targetPackage="com.fantj.sbmybatis.model" targetProject="src/main/java"><property name="enableSubPackages" value="true"/><property name="trimStrings" value="true"/></javaModelGenerator> <!-- 生成映射文件的包名和位置--><sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources"><property name="enableSubPackages" value="true"/></sqlMapGenerator> <!-- 生成DAO的包名和位置--><javaClientGenerator type="XMLMAPPER" targetPackage="com.fantj.sbmybatis.mapper" targetProject="src/main/java"><property name="enableSubPackages" value="true"/></javaClientGenerator> <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名--><table tableName="user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false"enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table></context>
</generatorConfiguration>

generatorConfig.xml

3. 利用IDE创建逆向工程启动类

4. add一个Maven configuration

5. 我的数据库和表结构

6. application配置文件

server:port: 8080
spring:datasource:name: test url: jdbc:mysql://127.0.0.1:3306/user username: rootpassword: root # druid 连接池type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver filters: stat maxActive: 20 initialSize: 1 maxWait: 60000 minIdle: 1 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: select 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false poolPreparedStatements: true maxOpenPreparedStatements: 20
mybatis:mapper-locations: classpath:mapping/*.xml type-aliases-package: com.fant.model #pagehelper分页插件
pagehelper: helperDialect: mysql reasonable: true supportMethodsArguments: true params: count=countSql

application.yml

运行generator工程自动生成代码

生成的文件

User.java

package com.fantj.model;import java.util.Date;public class User {private Integer id;private String username;private Date birthday;private String sex;private String address;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username == null ? null : username.trim();}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex == null ? null : sex.trim();}public String getAddress() {return address;}public void setAddress(String address) {this.address = address == null ? null : address.trim();}
}

User.java

UserMapper .java

package com.fantj.mapper;import com.fantj.model.User;import java.util.List;public interface UserMapper {int deleteByPrimaryKey(Integer id);int insert(User record);int insertSelective(User record);User selectByPrimaryKey(Integer id);int updateByPrimaryKeySelective(User record);int updateByPrimaryKey(User record);List<User> selectAll();
}

userMapper.java

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.fantj.mapper.UserMapper"><resultMap id="BaseResultMap" type="com.fantj.model.User"><id column="id" property="id" jdbcType="INTEGER"/><result column="username" property="username" jdbcType="VARCHAR"/><result column="birthday" property="birthday" jdbcType="DATE"/><result column="sex" property="sex" jdbcType="CHAR"/><result column="address" property="address" jdbcType="VARCHAR"/></resultMap><sql id="Base_Column_List"> id, username, birthday, sex, address </sql><select id="selectAll" resultMap="BaseResultMap">select<include refid="Base_Column_List"/>from user</select><select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer">select<include refid="Base_Column_List"/>from user where id = #{id,jdbcType=INTEGER}</select><delete id="deleteByPrimaryKey"parameterType="java.lang.Integer"> delete from user where id = #{id,jdbcType=INTEGER} </delete><insert id="insert"parameterType="com.fantj.model.User"> insert into user (id, username, birthday, sex, address) values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{birthday,jdbcType=DATE}, #{sex,jdbcType=CHAR}, #{address,jdbcType=VARCHAR}) </insert><insert id="insertSelective" parameterType="com.fantj.model.User">insert into user<trim prefix="(" suffix=")" suffixOverrides=","><if test="id != null">id,</if><if test="username != null">username,</if><if test="birthday != null">birthday,</if><if test="sex != null">sex,</if><if test="address != null">address,</if></trim><trim prefix="values (" suffix=")" suffixOverrides=","><if test="id != null">#{id,jdbcType=INTEGER},</if><if test="username != null">#{username,jdbcType=VARCHAR},</if><if test="birthday != null">#{birthday,jdbcType=DATE},</if><if test="sex != null">#{sex,jdbcType=CHAR},</if><if test="address != null">#{address,jdbcType=VARCHAR},</if></trim></insert><update id="updateByPrimaryKeySelective" parameterType="com.fantj.model.User">update user<set><if test="username != null">username = #{username,jdbcType=VARCHAR},</if><if test="birthday != null">birthday = #{birthday,jdbcType=DATE},</if><if test="sex != null">sex = #{sex,jdbcType=CHAR},</if><if test="address != null">address = #{address,jdbcType=VARCHAR},</if></set>where id = #{id,jdbcType=INTEGER}</update><update id="updateByPrimaryKey"parameterType="com.fantj.model.User"> update user set username = #{username,jdbcType=VARCHAR}, birthday = #{birthday,jdbcType=DATE}, sex = #{sex,jdbcType=CHAR}, address = #{address,jdbcType=VARCHAR} where id = #{id,jdbcType=INTEGER} </update>
</mapper>

userMapper.xml

修改启动类

逆向生成代码后，我们还需要在启动类上添加一个@MapperScan("com.fantj.mapper")注解，告诉我们的Mapper需要扫描的包，这样就不用每个Mapper上都添加@Mapper注解了

package com.fantj;import com.fantj.util.Params;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.List;@SpringBootApplication
@MapperScan("com.fantj.mapper")
public class MybatisApplication {public static void main(String[] args) {SpringApplication.run(MybatisApplication.class, args);}
}

App.java

完善controller和service

UserController.java

package com.fantj.controller;import com.fantj.model.User;
import com.fantj.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;import javax.jws.soap.SOAPBinding;
import java.util.Date;
import java.util.List;@RestController
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserService userService;@RequestMapping(method = RequestMethod.GET, value = "/delete/{id}")public void delete(@PathVariable("id") int id) {userService.delete(id);}@RequestMapping(method = RequestMethod.POST, value = "/insert")public void insert(User user) {userService.insert(user);}@RequestMapping(method = RequestMethod.POST, value = "/update/{id}")public void update(@RequestParam User user) {userService.update(user);}@RequestMapping(method = RequestMethod.GET, value = "/{id}/select")public User select(@PathVariable("id") int id) {return userService.selectById(id);}@RequestMapping(method = RequestMethod.GET, value = "/selectAll/{pageNum}/{pageSize}")public List<User> selectAll(@PathVariable("pageNum") int pageNum, @PathVariable("pageSize") int pageSize) {return userService.selectAll(pageNum, pageSize);}
}

UserController.java

UserService.java

package com.fantj.service;import com.fantj.model.User;import java.util.List;public interface UserService {/*** 删除*/public void delete(int id);/*** 增加*/public void insert(User user);/*** 更新*/public int update(User user);/*** 查询单个*/public User selectById(int id);/*** 查询全部列表*/public List<User> selectAll(int pageNum, int pageSize);
}

UserService.java

UserServiceImpl .java

package com.fantj.service.impl;import com.fantj.mapper.UserMapper;
import com.fantj.model.User;
import com.fantj.service.UserService;
import com.github.pagehelper.PageHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;@Service
public class UserServiceImpl implements UserService {@Autowiredprivate UserMapper userMapper;/*** 删除 * * @param id*/@Overridepublic void delete(int id) {userMapper.deleteByPrimaryKey(id);}/*** 增加 * * @param user*/@Overridepublic void insert(User user) {userMapper.insert(user);}/*** 更新 * * @param user*/@Overridepublic int update(User user) {return userMapper.updateByPrimaryKey(user);}/*** 查询单个 * * @param id*/@Overridepublic User selectById(int id) {return userMapper.selectByPrimaryKey(id);}/*** 查询全部列表,并做分页 * * @param pageNum 开始页数 * @param pageSize 每页显示的数据条数*/@Overridepublic List<User> selectAll(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); return userMapper.selectAll(); } }

UserServiceImpl.java

原文地址

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spring boot2 整合（一）Mybatis （特别完整！）

1. mybatis逆向攻城

1. 完善pom文件

2. 逆向所需配置文件generatorConfig.xml

3. 利用IDE创建逆向工程启动类

4. add一个Maven configuration

5. 我的数据库和表结构

6. application配置文件

生成的文件

User.java

UserMapper .java

UserMapper.xml

修改启动类

完善controller和service

UserController.java

UserService.java

UserServiceImpl .java

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