Mybatis-----优化配置文件，基于注解CR

 1 package TEST;
 2 
 3 import org.apache.ibatis.session.SqlSession;
 4 import org.junit.Test;
 5 
 6 import bean.Userinfo;
 7 
 8 import Mapper.UserinfoMapper;
 9 import Tools.Util;
10 
11 public class Demo {
12 
13 
14     //根据ID查询用户
15     @Test
16     public void findbyuserinfoID() throws Throwable{
17                 System.out.println("基于注解的方式查询ID");
18         // TODO Auto-generated method stub    
19         SqlSession sqlSession = Util.getSqlSession();
20                     
21         //得到UserMapperI接口的实现类对象，UserMapperI接口的实现类对象由sqlSession.getMapper(UserMapperI.class)动态构建出来
22         UserinfoMapper mapper = sqlSession.getMapper(UserinfoMapper.class);
23         //执行查询操作，将查询结果自动封装成User返回
24         Userinfo userinfo = mapper.getById(5);
25         //使用SqlSession执行完SQL之后需要关闭SqlSession
26         sqlSession.close();
27         System.out.println(userinfo);
28     }
29 
30     @Test
31     public void addUser() throws Throwable{
32                 System.out.println("基于注解的方式查询ID");
33         // TODO Auto-generated method stub    
34         SqlSession sqlSession = Util.getSqlSession(true);
35                     
36         //得到UserMapperI接口的实现类对象，UserMapperI接口的实现类对象由sqlSession.getMapper(UserMapperI.class)动态构建出来
37         UserinfoMapper mapper = sqlSession.getMapper(UserinfoMapper.class);
38         //执行查询操作，将查询结果自动封装成User返回
39         Userinfo userinfo = new Userinfo();
40         userinfo.setUname("楚云飞");
41         userinfo.setUpass("123");
42         userinfo.setId(3);
43         int adduser = mapper.addUser(userinfo);
44         //使用SqlSession执行完SQL之后需要关闭SqlSession
45         sqlSession.close();
46         System.out.println(adduser);
47     }
48     
49 }

 1 package bean;
 2 
 3 public class Userinfo {
 4 
 5     private String uname;
 6     
 7     private String upass;
 8     
 9     public int id;
10 
11     public int getId() {
12         return id;
13     }
14 
15     public void setId(int id) {
16         this.id = id;
17     }
18 
19     public String getUname() {
20         return uname;
21     }
22 
23     public void setUname(String uname) {
24         this.uname = uname;
25     }
26 
27     public String getUpass() {
28         return upass;
29     }
30 
31     public void setUpass(String upass) {
32         this.upass = upass;
33     }
34     
35     @Override
36         public String toString() {
37             return "User [id=" + id + ", name=" +uname + ", upass=" + upass + "]";
38          }
39 
40 }

 1 package Mapper;
 2 
 3 import org.apache.ibatis.annotations.Insert;
 4 import org.apache.ibatis.annotations.Select;
 5 
 6 import bean.Userinfo;
 7 
 8 public interface UserinfoMapper {
 9     @Select("select * from Userinfo where id=#{id}")
10     public Userinfo getById(int id);
11     @Insert("insert into userinfo(uname,upass,id) values(#{uname},#{upass},#{id})")
12     public int addUser(Userinfo userinfo);
13 }

package Tools;

import java.io.InputStream;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class Util {

    /**
         * 获取SqlSessionFactory
          * @return SqlSessionFactory
         */
        public static SqlSessionFactory getSqlSessionFactory() {
             String resource = "SqlMapConfig.xml";
             InputStream is = Util.class.getClassLoader().getResourceAsStream(resource);
             SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);
             return factory;
        }
        
        /**
      * 获取SqlSession
          * @return SqlSession
          */
        public static SqlSession getSqlSession() {
           return getSqlSessionFactory().openSession();
        }
         
     /**
         * 获取SqlSession
         * @param isAutoCommit 
         * true 表示创建的SqlSession对象在执行完SQL之后会自动提交事务
         * false 表示创建的SqlSession对象在执行完SQL之后不会自动提交事务，这时就需要我们手动调用sqlSession.commit()提交事务
        * @return SqlSession
        */
       public static SqlSession getSqlSession(boolean isAutoCommit) {
           return getSqlSessionFactory().openSession(isAutoCommit);
       }
    }

 1 <?xml version="1.0" encoding="UTF-8" ?> 
 2 <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" 
 3          "http://mybatis.org/dtd/mybatis-3-config.dtd">
 4 <configuration>
 5      
 6     <properties resource="jdbc.properties"></properties>
 7     <!-- 自定义别名（如果在配置文件的过程中发现别名报错，可能是位置顺序有问题） -->
 8     <typeAliases>  
 9         <typeAlias type="bean.Userinfo" alias="User"/>  
10     </typeAliases>
11     <environments default="development">
12         <environment id="development">
13             <transactionManager type="JDBC" />
14             <dataSource type="POOLED">
15                 <property name="driver" value="${jdbc.driver}"/>
16                 <property name="url" value="${jdbc.url}"/>
17                 <property name="username" value="${jdbc.username}" />
18                 <property name="password" value="${jdbc.password}" />
19             </dataSource>
20         </environment>
21     </environments>
22     
23     <!-- 读取Mapper包下的UserinfoMapper文件 -->
24     <mappers>
25         <mapper class="Mapper.UserinfoMapper"/>
26     </mappers>
27 </configuration>