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MyBatis使用详解
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‎Chapter3-2-8/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.didispace</groupId>
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<artifactId>Chapter3-2-8</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<name>Chapter3-2-8</name>
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<description>Spring Boot project</description>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>1.3.2.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mybatis.spring.boot</groupId>
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<artifactId>mybatis-spring-boot-starter</artifactId>
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<version>1.1.1</version>
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</dependency>
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>5.1.21</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎Chapter3-2-8/src/main/java/com/didispace/Application.java

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package com.didispace;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class Application {
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public static void main(String[] args) {
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SpringApplication.run(Application.class, args);
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}
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}

‎Chapter3-2-8/src/main/java/com/didispace/domain/User.java

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package com.didispace.domain;
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public class User {
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private Long id;
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private String name;
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private Integer age;
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public User() {
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}
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public User(Long id, String name, Integer age) {
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this.id = id;
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this.name = name;
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this.age = age;
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}
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public User(String name, Integer age) {
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this.name = name;
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this.age = age;
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}
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Integer getAge() {
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return age;
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}
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public void setAge(Integer age) {
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this.age = age;
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}
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}

‎Chapter3-2-8/src/main/java/com/didispace/domain/UserMapper.java

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package com.didispace.domain;
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import org.apache.ibatis.annotations.*;
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import java.util.List;
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import java.util.Map;
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@Mapper
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public interface UserMapper {
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@Select("SELECT * FROM user WHERE name = #{name}")
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User findByName(@Param("name") String name);
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@Results({
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@Result(property = "name", column = "name"),
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@Result(property = "age", column = "age")
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})
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@Select("SELECT name, age FROM user")
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List<User> findAll();
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@Insert("INSERT INTO user(name, age) VALUES(#{name}, #{age})")
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int insert(@Param("name") String name, @Param("age") Integer age);
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@Update("UPDATE user SET age=#{age} WHERE name=#{name}")
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void update(User user);
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@Delete("DELETE FROM user WHERE id =#{id}")
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void delete(Long id);
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@Insert("INSERT INTO user(name, age) VALUES(#{name}, #{age})")
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int insertByUser(User user);
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@Insert("INSERT INTO user(name, age) VALUES(#{name,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER})")
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int insertByMap(Map<String, Object> map);
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}

‎Chapter3-2-8/src/main/resources/application.properties

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spring.datasource.url=jdbc:mysql://localhost:3306/test
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spring.datasource.username=root
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spring.datasource.password=123456
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spring.datasource.driver-class-name=com.mysql.jdbc.Driver

‎Chapter3-2-8/src/test/java/com/didispace/ApplicationTests.java

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package com.didispace;
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import com.didispace.domain.User;
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import com.didispace.domain.UserMapper;
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import org.junit.Assert;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.SpringApplicationConfiguration;
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import org.springframework.test.annotation.Rollback;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
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import org.springframework.transaction.annotation.Transactional;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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@RunWith(SpringJUnit4ClassRunner.class)
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@SpringApplicationConfiguration(classes = Application.class)
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@Transactional
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public class ApplicationTests {
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@Autowired
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private UserMapper userMapper;
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@Test
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@Rollback
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public void testUserMapper() throws Exception {
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// insert一条数据，并select出来验证
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userMapper.insert("AAA", 20);
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User u = userMapper.findByName("AAA");
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Assert.assertEquals(20, u.getAge().intValue());
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// update一条数据，并select出来验证
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u.setAge(30);
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userMapper.update(u);
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u = userMapper.findByName("AAA");
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Assert.assertEquals(30, u.getAge().intValue());
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// 删除这条数据，并select验证
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userMapper.delete(u.getId());
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u = userMapper.findByName("AAA");
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Assert.assertEquals(null, u);
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u = new User("BBB", 30);
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userMapper.insertByUser(u);
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Assert.assertEquals(30, userMapper.findByName("BBB").getAge().intValue());
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Map<String, Object> map = new HashMap<>();
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map.put("name", "CCC");
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map.put("age", 40);
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userMapper.insertByMap(map);
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Assert.assertEquals(40, userMapper.findByName("CCC").getAge().intValue());
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List<User> userList = userMapper.findAll();
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for(User user : userList) {
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Assert.assertEquals(null, user.getId());
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Assert.assertNotEquals(null, user.getName());
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}
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}
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}

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