- 新建一个文件,选择为JAVA EE web选项
- 建好项目后,在web文件下建立lib包,并导入所需要的包(注意每个人的mysql版本不同,所需的jdbc包版本也不同,以自己的为主)
- 在src下建立所需的文件夹
- 将spring.xml文件拷贝到src下
- 编辑spring.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 扫描注解“@Service”-->
<context:component-scan base-package="com.zhongruan"></context:component-scan>
<!-- <bean id="userService" class="com.zhongruan.service.impl.UserServiceImpl"></bean>-->
<!-- <bean id="user" class="com.zhongruan.bean.User">-->
<!-- <property name="id" value="1"></property>-->
<!-- <property name="username" value="zfx"></property>-->
<!-- <property name="password" value="123"></property>-->
<!-- </bean>-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost/zjgm?serverTimezone=CTT"></property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>
</beans>
6.User.java
package com.zhongruan.bean;
public class User {
private int id;
private String username;
private String password;
public int getId() {
return id;
}
public void setId(int 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;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
}
- IUserDao.java`
package com.zhongruan.dao;
import com.zhongruan.bean.User;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
public interface IUserDao {
List<User> findall();
void delete(int id);
void add(String username,String password);
void update(int id,String username,String password);
}
- IUserDaoImpl.java
package com.zhongruan.dao.impl;
import com.zhongruan.bean.User;
import com.zhongruan.dao.IUserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class UserDaoImpl implements IUserDao {
@Autowired
private JdbcTemplate jdbcTemplate;
@Override
public List<User> findall() {
//创建容器存储
BeanPropertyRowMapper<User> rowMapper = new BeanPropertyRowMapper<>(User.class);
//写sql语句
String sql = "select * from tb_user";
//执行查询
List<User> users = jdbcTemplate.query(sql, rowMapper);
return users;
}
@Override
public void delete(int id) {
String sql = "delete from tb_user where id=?";
jdbcTemplate.update(sql, id);
}
@Override
public void add(String username, String password) {
String sql = "insert into tb_user (username,password) values (?,?)";
jdbcTemplate.update(sql, username, password);
}
@Override
public void update(int id, String username, String password) {
String sql = "update tb_user set username=?,password=? where id=?";
jdbcTemplate.update(sql, username, password, id);
}
}
- IUSerService.java
package com.zhongruan.service;
import com.zhongruan.bean.User;
import java.util.List;
public interface IUserService {
List<User> findall();
void delete(int id);
void add(String username,String password);
void update(int id,String username,String password);
}
10.UserServiceImpl.java
package com.zhongruan.service.impl;
import com.zhongruan.bean.User;
import com.zhongruan.dao.IUserDao;
import com.zhongruan.dao.impl.UserDaoImpl;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements IUserService {
@Autowired
private IUserDao userDao;
@Override
public List<User> findall() {
List<User> users = userDao.findall();
return users;
}
@Override
public void delete(int id) {
userDao.delete(id);
}
@Override
public void add(String username, String password) {
userDao.add(username, password);
}
@Override
public void update(int id, String username, String password) {
userDao.update(id, username, password);
}
}
- Test.java
package com.zhongruan.test;
import com.zhongruan.bean.User;
import com.zhongruan.dao.IUserDao;
import com.zhongruan.service.IUserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.applet.AppletContext;
import java.util.List;
public class Test {
public static void main(String[] args) {
ApplicationContext context=new ClassPathXmlApplicationContext("spring.xml");
// IUserService userService= (IUserService) context.getBean("userServiceImpl");
// userService.findAll();
// User user= (User) context.getBean("user");
// System.out.println(user);
// IUserDao userDao= (IUserDao) context.getBean("userImpl");
// List<User> users=userDao.findall();
// System.out.println(users);
//
// userDao.delete(4);
// List<User> users1=userDao.findall();
// System.out.println(users1);
IUserService userService= (IUserService) context.getBean("userServiceImpl");
List<User> users=userService.findall();
System.out.println(users);
}
}
- 完整格式