这篇文章将为大家详细讲解有关利用mybatis怎么对数据库进行增删改查操作，文章内容质量较高，因此小编分享给大家做个参考，希望大家阅读完这篇文章后对相关知识有一定的了解。
所需要用到的其他工具或技术:
项目管理工具 : Maven
测试运行工具 : Junit
数据库 : Derby
Maven Dependencies:
<dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.7</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.9</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.10.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbyclient</artifactId>
<version>10.10.2.0</version>
</dependency>
</dependencies> SQL 建表及数据插入（沿用前两节中的数据库表及数据）:
CREATE TABLE USER_TEST_TB( ID INT PRIMARY KEY, USERNAME VARCHAR(20) NOT NULL, PASSWORD VARCHAR(20) NOT NULL, NICKNAME VARCHAR(20) NOT NULL ); INSERT INTO USER_TEST_TB VALUES(1,'1st','111','Jack'); INSERT INTO USER_TEST_TB VALUES(2,'2nd','222','Rose'); INSERT INTO USER_TEST_TB VALUES(3,'3rd','333','Will');
Mybatis配置文件 src/main/resource源目录下
test-mybatis-configuration.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<properties>
<property name="driver" value="org.apache.derby.jdbc.ClientDriver" />
<property name="url"
value="jdbc:derby://localhost:1527/bjpowernode;create=true" />
</properties>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="${driver}" />
<property name="url" value="${url}" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/bjpowernode/practice/UserMapper.xml" /
</mappers>
</configuration> User.java对象类(src/main/java/com/bjpowernode/practice目录下)
package com.bjpowernode.practice;
public class User
{
private Integer id;
private String username;
private String password;
private String nickname;
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;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this.password = password;
}
public String getNickname()
{
return nickname;
}
public void setNickname(String nickname)
{
this.nickname = nickname;
}
} UserMapper.xml Mapper文件（src/main/java/com.bjpowernode.practice目录下）
<?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.bjpowernode.practice.UserMapper">
<!-- 查询 -->
<select id="getUser" resultType="com.bjpowernode.practice.User">
select *
from USER_TEST_TB
</select>
<!-- 插入 -->
<insert id="insertUser">
insert into
USER_TEST_TB
values(#{id},#{username},#{password},#{nickname})
</insert>
<!-- 更改 -->
<update id="updateUser">
update USER_TEST_TB set
USERNAME = #{username},
PASSWORD = #{password},
NICKNAME = #{nickname}
where ID = #{id}
</update>
<!-- 删除 -->
<delete id="deleteUser">
delete from USER_TEST_TB WHERE ID=#{id}
</delete>
</mapper> UserMapper.java Mapper类（src/main/java/com.bjpowernode.practice目录下）
package com.bjpowernode.practice;
import java.util.List;
public interface UserMapper
{
public List<User> getUser();
public void insertUser(User user);
public void updateUser(User user);
public void deleteUser(int userId);
} 测试类TestMyBatis.java（src/test/java/com.bjpowernode.practice目录下）
package com.bjpowernode.practice;
import java.io.InputStream;
import java.text.MessageFormat;
import java.util.List;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;
public class TestMyBatis
{
private String source;
private InputStream inputStream;
private SqlSessionFactory sqlSessionFactory;
@Before
public void setUp()
{
/**
* 准备Mybatis运行环境
*/
source = "test-mybatis-configuration.xml";
inputStream = TestMyBatis.class.getClassLoader().getResourceAsStream(source);
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
}
@Test
public void testGet()
{
try
{
// 获取Session连接
SqlSession session = sqlSessionFactory.openSession();
// 获取Mapper
UserMapper userMapper = session.getMapper(UserMapper.class);
// 显示User信息
System.out.println("Test Get start...");
this.printUsers(userMapper.getUser());
System.out.println("Test Get finished...");
}
catch (Exception e)
{
e.printStackTrace();
}
}
@Test
public void testInsert()
{
try
{
// 获取Session连接
SqlSession session = sqlSessionFactory.openSession();
// 获取Mapper
UserMapper userMapper = session.getMapper(UserMapper.class);
System.out.println("Test insert start...");
// 显示插入之前User信息
System.out.println("Before insert");
this.printUsers(userMapper.getUser());
// 执行插入
userMapper.insertUser(this.mockUser("FREU_INS_USER", "BJPOWERNODE_INS_PASS", "BJPOWERNODE_INS_NICK"));
// 提交事务
session.commit();
// 显示插入之后User信息
System.out.println("\r\nAfter insert");
this.printUsers(userMapper.getUser());
System.out.println("Test insert finished...");
}
catch (Exception e)
{
e.printStackTrace();
}
}
@Test
public void testUpdate()
{
try
{
// 获取Session连接
SqlSession session = sqlSessionFactory.openSession();
// 获取Mapper
UserMapper userMapper = session.getMapper(UserMapper.class);
System.out.println("Test update start...");
// 显示更新之前User信息
System.out.println("Before update");
this.printUsers(userMapper.getUser());
// 执行更新
userMapper.updateUser(this.mockUser("FREU_UPD_USER", "BJPOWERNODE_UPD_PASS", "BJPOWERNODE_UPD_NICK"));
// 提交事务
session.commit();
// 显示更新之后User信息
System.out.println("\r\nAfter update");
this.printUsers(userMapper.getUser());
System.out.println("Test update finished...");
}
catch (Exception e)
{
e.printStackTrace();
}
}
@Test
public void testDelete()
{
try
{
// 获取Session连接
SqlSession session = sqlSessionFactory.openSession();
// 获取Mapper
UserMapper userMapper = session.getMapper(UserMapper.class);
System.out.println("Test delete start...");
// 显示删除之前User信息
System.out.println("Before delete");
this.printUsers(userMapper.getUser());
// 执行删除
userMapper.deleteUser(this.mockUser(null, null, null).getId());
// 提交事务
session.commit();
// 显示删除之后User信息
System.out.println("\r\nAfter delete");
this.printUsers(userMapper.getUser());
System.out.println("Test delete finished...");
}
catch (Exception e)
{
e.printStackTrace();
}
}
/**
*
* 组装一个User对象
*
* @return
*/
public User mockUser(String username, String password, String nickname)
{
User user = new User();
user.setId(10);
user.setUsername(username);
user.setPassword(password);
user.setNickname(nickname);
return user;
}
/**
*
* 打印用户信息到控制台
*
* @param users
*/
private void printUsers(final List<User> users)
{
int count = 0;
for (User user : users)
{
System.out.println(MessageFormat.format("==User[{0}]=================", ++count));
System.out.println("User Id: " + user.getId());
System.out.println("User UserName: " + user.getUsername());
System.out.println("User Password: " + user.getPassword());
System.out.println("User nickname: " + user.getNickname());
}
}
} 关于利用mybatis怎么对数据库进行增删改查操作就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。
