016_SpringBoot整合MyBatis

1. 使用maven构建SpringBoot的名叫spring-boot-mybatis项目

2. pom.xml

<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>com.bjbs</groupId><artifactId>spring-boot-mybatis</artifactId><version>0.0.1-SNAPSHOT</version><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.13.RELEASE</version></parent><!-- 修改jdk版本 --><properties><java.version>1.8</java.version><!-- 指定thymeleaf和thymeleaf-layout-dialect高版本可以防止html标签不规范报错 --><thymeleaf.version>3.0.2.RELEASE</thymeleaf.version><thymeleaf-layout-dialect.version>2.0.4</thymeleaf-layout-dialect.version></properties><dependencies><!-- springBoot的启动器 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><!-- Mybatis启动器 --><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.1.1</version></dependency><!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.27</version></dependency><!-- https://mvnrepository.com/artifact/com.mchange/c3p0 --><dependency><groupId>com.mchange</groupId><artifactId>c3p0</artifactId><version>0.9.2</version></dependency></dependencies>
</project>

3. 在src/main/resources下创建全局配置文件application.properties

spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.25.138:3306/StudyMybatis?useSSL=true&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=lyw123456spring.datasource.type=com.mchange.v2.c3p0.ComboPooledDataSource

4. 数据库表设计

5. 新建User.java

package com.bjbs.pojo;import java.io.Serializable;
import java.util.Date;
import org.springframework.format.annotation.DateTimeFormat;public class User implements Serializable {private static final long serialVersionUID = 1L;private Integer id;private String name;private String sex;@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")private Date birthday;private String address;public User() {}public User(String name, String sex, Date birthday, String address) {this.name = name;this.sex = sex;this.birthday = birthday;this.address = address;}public User(Integer id, String name, String sex, Date birthday, String address) {this.id = id;this.name = name;this.sex = sex;this.birthday = birthday;this.address = address;}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {return "User [id=" + id + ", name=" + name + ", sex=" + sex + ", birthday=" + birthday + ", address=" + address+ "]";}}

6. 新建UserMapper.java

package com.bjbs.mapper;import java.util.List;
import com.bjbs.pojo.User;public interface UserMapper {public List<User> findAllUser();void saveUser(User user);User findUserById(Integer id);void updateUser(User user);void deleteUserById(Integer id);
}

7. 新建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.bjbs.mapper.UserMapper"><select id="findAllUser" resultType="com.bjbs.pojo.User">select * from user</select><insert id="saveUser" parameterType="com.bjbs.pojo.User">insert into user values(null, #{name}, #{sex}, #{birthday}, #{address})</insert><select id="findUserById" resultType="com.bjbs.pojo.User">select * from user where id = #{value}</select><update id="updateUser" parameterType="com.bjbs.pojo.User">update user set name=#{name}, sex = #{sex}, birthday = #{birthday}, address = #{address} where id=#{id}</update><delete id="deleteUserById">delete from user where id = #{value}</delete></mapper>

8. 新建UserService.java

package com.bjbs.service;import java.util.List;
import com.bjbs.pojo.User;public interface UserService {List<User> findAllUser();void saveUser(User user);User findUserById(Integer id);void updateUser(User user);void deleteUserById(Integer id);
}

9. 新建UserServiceImpl.java

package com.bjbs.service.impl;import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.bjbs.mapper.UserMapper;
import com.bjbs.pojo.User;
import com.bjbs.service.UserService;@Service
@Transactional
public class UserServiceImpl implements UserService {@Autowiredprivate UserMapper userMapper;@Overridepublic List<User> findAllUser() {return userMapper.findAllUser();}@Overridepublic void saveUser(User user) {userMapper.saveUser(user);}@Overridepublic User findUserById(Integer id) {return userMapper.findUserById(id);}@Overridepublic void updateUser(User user) {userMapper.updateUser(user);}@Overridepublic void deleteUserById(Integer id) {userMapper.deleteUserById(id);}}

10. 新建App.java

package com.bjbs;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** SpringBoot启动类*/
@SpringBootApplication
@MapperScan("com.bjbs.mapper") //@MapperScan 用户扫描MyBatis的Mapper接口
public class App {public static void main(String[] args) {SpringApplication.run(App.class, args);}
}

11. 在src/main/resources/templates下, 新建allUser.html

<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>展示用户数据</title><style type="text/css">th {width: 100px;}</style></head><body><table border="1"><tr><th>用户ID</th><th>用户姓名</th><th>用户性别</th><th style="width: 300px;">用户生日</th><th>用户地址</th><th style="width: 300px;">操作</th></tr><tr th:each="user : ${list}"><td th:text="${user.id}"></td><td th:text="${user.name}"></td><td th:text="${user.sex}"></td><td th:text="${#dates.format(user.birthday, 'yyyy-MM-dd HH:mm:ss')}"></td><td th:text="${user.address}"></td><td><a th:href="@{/findUserById(id=${user.id})}">更新用户</a><a th:href="@{/delUser(id=${user.id})}">删除用户</a><a th:href="@{/addUser}">添加用户</a></td></tr></table></body>
</html>

12. 在src/main/resources/templates下, 新建addUser.html

<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>添加用户</title></head><body><form th:action="@{/saveUser}" method="post">用户姓名: <input type="text" name="name"/><br/>用户性别: <input type="text" name="sex"/><br/>用户生日: <input type="text" name="birthday"/><br/>用户地址: <input type="text" name="address"/><br/><input type="submit" value="确定"/><br/></form></body>
</html>

13. 在src/main/resources/templates下, 新建editUser.html

<!DOCTYPE html>
<html><head><meta charset="UTF-8" /><title>更新用户信息</title></head><body><form th:action="@{/updateUser}" method="post"><input type="hidden" name="id" th:field="${user.id}"/>用户姓名: <input type="text" name="name" th:field="${user.name}"/><br/>用户性别: <input type="text" name="sex" th:field="${user.sex}"/><br/>用户生日: <input type="text" name="birthday" th:field="${user.birthday}"/><br/>用户地址: <input type="text" name="address" th:field="${user.address}"/><br/><input type="submit" value="确定"/><br/></form></body>
</html>

14. 运行项目并使用浏览器访问

15. 点击添加用户链接, 跳转到添加用户页面

16. 添加一个ID为41的用户

17. 点击ID为40的更新用户链接, 跳转到更新用户页面

18. 修改用户信息

19. 点击确定按钮, 保存用户信息

20. 点击ID为39的删除用户链接, 删除用户成功

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