多平台统一管理软件接口,如何实现多平台统一管理软件接口
229
2023-04-09
mybatis实现增删改查_动力节点Java学院整理
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:
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
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
value="jdbc:derby://localhost:1527/bjpowernode;create=true" /> 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)
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> select * from USER_TEST_TB insert into USER_TEST_TB values(#{id},#{username},#{password},#{nickname}) update USER_TEST_TB set USERNAME = #{username}, PASSWORD = #{password}, NICKNAME = #{nickname} where ID = #{id} delete from USER_TEST_TB WHERE ID=#{id} 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 public void insertUser(User user); public void updateUser(User user); public void deleteUser(int userId); } 测试类TestMyBatis.java(src/test/java/OeOyipCQcom.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 = sOeOyipCQqlSessionFactory.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 userMapperOeOyipCQ = 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 { 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()); } } } 总结 以上所述是给大家介绍的mybatis实现增删改查_动力节点Java学院整理,希望对大家有所帮助,如果大家有任何疑问请给我留言,会及时回复大家的。在此也非常感谢大家对我们网站的支持!
value="jdbc:derby://localhost:1527/bjpowernode;create=true" />
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)
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> select * from USER_TEST_TB insert into USER_TEST_TB values(#{id},#{username},#{password},#{nickname}) update USER_TEST_TB set USERNAME = #{username}, PASSWORD = #{password}, NICKNAME = #{nickname} where ID = #{id} delete from USER_TEST_TB WHERE ID=#{id}
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)
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
select *
from USER_TEST_TB
insert into
USER_TEST_TB
values(#{id},#{username},#{password},#{nickname})
update USER_TEST_TB set
USERNAME = #{username},
PASSWORD = #{password},
NICKNAME = #{nickname}
where ID = #{id}
delete from USER_TEST_TB WHERE ID=#{id}
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
public void insertUser(User user);
public void updateUser(User user);
public void deleteUser(int userId);
}
测试类TestMyBatis.java(src/test/java/OeOyipCQcom.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 = sOeOyipCQqlSessionFactory.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 userMapperOeOyipCQ = 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
{
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());
}
}
}
总结
以上所述是给大家介绍的mybatis实现增删改查_动力节点Java学院整理,希望对大家有所帮助,如果大家有任何疑问请给我留言,会及时回复大家的。在此也非常感谢大家对我们网站的支持!
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