017_Spring+Mybatis+C3P0

最新推荐文章于 2024-07-06 20:30:42 发布

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该博客详细介绍了如何从头开始创建一个SpringMybatis的Java项目，包括配置jdbc.properties、SqlMapConfig.xml、applicationContext.xml，定义User实体类，创建UserMapper接口及XML配置，实现UserService接口，编写测试类并展示运行结果。整个过程涵盖了Spring和Mybatis的整合应用。

1. 新建一个名为SpringMybatis的Java项目, 添加相关jar包。

2. 在src目录下配置jdbc.properties

3. 在src目录下配置SqlMapConfig.xml

4. 在src目录下配置applicationContext.xml

5. 创建User.java

package com.lywgames.domain;

import java.util.Date;

public class User {
	private Integer id;
	private String name;
	private String sex;
	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;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", sex=" + sex + ", birthday=" + birthday + ", address=" + address
				+ "]";
	}

}

6. 创建UserMapper.java

package com.lywgames.dao;

import java.util.List;
import com.lywgames.domain.User;

public interface UserMapper {
	public List<User> selectUser();
}

7. 在和UserMapper.java相同的包下, 创建UserMapper.xml

8. 创建UserService.java

package com.lywgames.service;

import java.util.List;
import com.lywgames.domain.User;

public interface UserService {
	List<User> selectUser();
}

9. 创建UserServiceImpl.java

package com.lywgames.service.impl;

import java.util.List;
import com.lywgames.dao.UserMapper;
import com.lywgames.domain.User;
import com.lywgames.service.UserService;

public class UserServiceImpl implements UserService {

	private UserMapper userMapper;
	
	public void setUserMapper(UserMapper userMapper) {
		this.userMapper = userMapper;
	}

	@Override
	public List<User> selectUser() {
		return userMapper.selectUser();
	}

}

10. 创建Test.java

package com.lywgames;

import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.lywgames.domain.User;
import com.lywgames.service.UserService;

public class Test {
	public static void main(String[] args) {
		// 类路径加载配置文件
		ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
		// 获取UserService
		UserService userService = context.getBean(UserService.class);
		// 查询操作
		List<User> users = userService.selectUser();
		for (User user : users) {
			System.out.println(user);
		}
	}
}

11. 数据库user表内容