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
5.配置Mybatis文件
6.配置appplicationContext.xml文件
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:
