Spring整合Mybatis

以前Spring和Mybatis整合时,访问数据时是使用硬编码的方式连接数据里对数据进行CRUD,这样用到的对象较多,且不易维护,重复性代码也很多
SqlSessionBuileer ===>   SqlSessionFactoty =====>  SqlSession  =====>  CRUD(增删改查)

现在我们直接将这些对象以Bean的方式,配置在Spring配置文件中,并且将它们之间的关系建立好,最后只需通过getBean得到某个service的实现类便能执行CRUD,相当于将mybatis-config.xml中的配置转移至了applicationContext.xml配置文件中


基本步骤    (暂不使用注解实现)

1.导入jar包,以maven项目为例
2.建立开发目录结构，创建实体类
3.创建数据访问接口
4.配置sql映射文件
5.配置Mybatis文件(如果有映射类名等操作可放在Mybatis-config.xml中配置)
6.配置appplicationContext.xml文件
7.测试

 

 

1.pom.xml导入jar包,如果是普通web项目,从官网下载jar包导入即可,在spring导入的jar包之上再导入这些jar包,Spring的jar包未 展示

      org.springframework
      spring-jdbc
      5.1.5.RELEASE
    
    
      org.springframework
      spring-tx
      5.1.5.RELEASE
    
    
      org.mybatis
      mybatis-spring
      1.2.2
    

    
      commons-pool
      commons-pool
      1.6
    
    
      commons-dbcp
      commons-dbcp
      1.4
    

2.建立开发目录结构，创建实体类

package cn.einblatt.ssm.entity;

import java.util.Date;
import java.util.List;

public class User {
	private Integer id; //id 
	private String userCode; //用户编码
	private String userName; //用户名称
	private String userPassword; //用户密码
	private Integer gender;  //性别
	private Date birthday;  //出生日期
	private String phone;   //电话
	private String address; //地址
	private Integer userRole;    //用户角色
	private Integer createdBy;   //创建者
	private Date creationDate; //创建时间
	private Integer modifyBy;     //更新者
	private Date modifyDate;   //更新时间
	private Role role;
	private List
 addressList;

	public List
 getAddressList() {
		return addressList;
	}

	public void setAddressList(List
 addressList) {
		this.addressList = addressList;
	}

	public Role getRole() {
		return role;
	}

	public void setRole(Role role) {
		this.role = role;
	}

	public void setAge(Integer age) {
		this.age = age;
	}

	private Integer age;//年龄
	
	private String userRoleName;    //用户角色名称
	
	
	public String getUserRoleName() {
		return userRoleName;
	}
	public void setUserRoleName(String userRoleName) {
		this.userRoleName = userRoleName;
	}
	public Integer getAge() {
		/*long time = System.currentTimeMillis()-birthday.getTime();
		Integer age = Long.valueOf(time/365/24/60/60/1000).IntegerValue();*/
		Date date = new Date();
		Integer age = date.getYear()-birthday.getYear();
		return age;
	}
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getUserCode() {
		return userCode;
	}
	public void setUserCode(String userCode) {
		this.userCode = userCode;
	}
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getUserPassword() {
		return userPassword;
	}
	public void setUserPassword(String userPassword) {
		this.userPassword = userPassword;
	}
	public Integer getGender() {
		return gender;
	}
	public void setGender(Integer gender) {
		this.gender = gender;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	public Integer getUserRole() {
		return userRole;
	}
	public void setUserRole(Integer userRole) {
		this.userRole = userRole;
	}
	public Integer getCreatedBy() {
		return createdBy;
	}
	public void setCreatedBy(Integer createdBy) {
		this.createdBy = createdBy;
	}
	public Date getCreationDate() {
		return creationDate;
	}
	public void setCreationDate(Date creationDate) {
		this.creationDate = creationDate;
	}
	public Integer getModifyBy() {
		return modifyBy;
	}
	public void setModifyBy(Integer modifyBy) {
		this.modifyBy = modifyBy;
	}
	public Date getModifyDate() {
		return modifyDate;
	}
	public void setModifyDate(Date modifyDate) {
		this.modifyDate = modifyDate;
	}
}

 3.创建数据访问接口,UserMapper  为了结构清晰,便于浏览,接口中直写了一个方法用于演示

package cn.einblatt.ssm.dao;

import cn.einblatt.ssm.entity.Bill;
import cn.einblatt.ssm.entity.Provider;
import cn.einblatt.ssm.entity.User;
import org.apache.ibatis.annotations.Param;


import java.util.List;
import java.util.Map;

public interface UserMapper {

    //查询用户数量
    public int getCount();

}

 

接口实现类 UserMapperImpl 
 

package cn.einblatt.ssm.dao;

import cn.einblatt.ssm.entity.Bill;
import cn.einblatt.ssm.entity.Provider;
import cn.einblatt.ssm.entity.User;
import cn.einblatt.ssm.util.CreateSqlSession;
import org.apache.ibatis.session.SqlSession;
import org.mybatis.spring.SqlSessionTemplate;

import java.util.List;
import java.util.Map;

public class UserMapperImpl implements UserMapper {

    private SqlSessionTemplate sqlSession;  //此类实现了SqlSession,功能类似于SqlSession

  
    @Override
    public int getCount() {

      return   sqlSession.getMapper(UserMapper.class).getCount();
    }

}

4.配置sql映射文件

    
    
        SELECT COUNT(*) FROM `smbms_user`
    

5.配置Mybatis文件

 

6.配置appplicationContext.xml文件

   


    
    

       
    
        
        
        
        
    

    
    
        
        
        
        
    

    
    
 
         
        

          
        
        

 
         //这里用于演示所以只扫描了一个Mapper文件
                               如果有多个Mapper文件,可将它们同一包下
                               然后扫描整个包
        
            
                UserMapper.xml
            
        
    

   
    
        
    

    
        
    

7.测试

 

import cn.einblatt.ssm.dao.UserMapper;
import cn.einblatt.ssm.dao.UserMapperImpl;
import cn.einblatt.ssm.entity.Game.Equip;
import cn.einblatt.ssm.entity.Game.Player;
import cn.einblatt.ssm.service.GameSeivice;
import cn.einblatt.ssm.service.Impl.GameServiceImpl;
import cn.einblatt.ssm.service.Impl.UserServiceImpl;
import cn.einblatt.ssm.service.UserService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import spring.Bumblebee;

import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.List;

public class TestSpring {

    @Test
    public void getSpring(){

        //方式一
        ApplicationContext applicationContext= new 
        ClassPathXmlApplicationContext("applicationContext.xml");

        UserMapper userMapper= (UserMapper) applicationContext.getBean("userMapper");
        System.out.println("用户总数:"+userMapper.getCount());


    };



}

 

 结果如下: