Atitit mybatis3 注解模式使用总结 目录 1. mybatisdemo 1 1.1. /ormMybatis3demo/src/db.properties 1 1.2. /ormMyb

Atitit mybatis3 注解模式使用总结

 

目录

1. mybatisdemo 1

1.1. /ormMybatis3demo/src/db.properties 1

1.2. /ormMybatis3demo/src/pkg1/MapperCls.java 1

1.3. /ormMybatis3demo/src/mybatis.xml 2

1.4. mybatisdemo 3

2. 错误解决 4

2.1. mybatis The error may involve defaultParameterMap 4

2.2. org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 5

3. ref 5

 

 

1. Mybatisdemo

/ormMybatis3demo/libs/mybatis-3.2.0-SNAPSHOT.jar

 

1. 1. /ormMybatis3demo/src/db.properties

# Properties file for JDBC configuration

#

# Place this file in the root CLASSPATH

 

#MySQL Connection Configuration  

mysql.driver=org.sqlite.JDBC

mysql.url=jdbc:sqlite:D:\\000000\\mydatabase.sqlite

mysql.username=root

mysql.password=

 

ds =java\:/comp/env/jndi/wxb_site_newxxx

 

 

1. 1. /ormMybatis3demo/src/pkg1/MapperCls.java

 

package pkg1;

 

 

 

import java.util.List;

import java.util.Map;

 

import org.apache.ibatis.annotations.Delete;

import org.apache.ibatis.annotations.Insert;

import org.apache.ibatis.annotations.Param;

import org.apache.ibatis.annotations.Select;

import org.apache.ibatis.annotations.Update;

 

 

 

public interface MapperCls {

    

    /*

     * 这是基于注解的映射方式，实现对数据的增删改查，将sql语句直接写在注解的括号中

     * 这是一个接口，其不需要类去实现它

     * 下边分别是插入，删除，修改，查询一个记录，查询所有的记录

     * */

    

 

    

    @Select("${sql_intag}")

    public List<Map>   query(@Param("sql_intag") String sql);

    

 

    

}

1. 1. /ormMybatis3demo/src/mybatis.xml

 

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE configuration 

PUBLIC "-//mybatis.org//DTD Config 3.0//EN" 

"http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>

 

    <properties resource="db.properties"></properties>

 

<settings>

<!--   

<setting name="defaultExecutorType" value="REUSE" />

-->

<setting name="defaultStatementTimeout" value="30000" />

</settings>

 

<!-- <plugins>

<plugin interceptor="cn.freeteam.util.OffsetLimitInterceptor"> -->

<!-- <property name="dialectClass" value="cn.freeteam.util.SQLServerDialect"/> -->

<!--</plugin>

</plugins> -->

<environments default="mysql">

 

<environment id="mysql">

<transactionManager type="JDBC" ></transactionManager>

<dataSource type="POOLED">

<property name="driver" value="${mysql.driver}" />

<property name="url" value="${mysql.url}" />

<property name="username" value="${mysql.username}" />

<property name="password" value="${mysql.password}" />

<property name="poolMaximumIdleConnections" value="0" />

<property name="poolMaximumActiveConnections" value="10" />

</dataSource>

</environment>

</environments>

 

<mappers>

 <mapper class="pkg1.MapperCls"/>

 

 

<!--   

  <mapper resource="cn/freeteam/model/OperlogsMapper.xml"/>

  -->

</mappers>

</configuration>

1. 1. mybatisdemo 

 

 

package pkg1;

import java.io.InputStream;

import java.util.List;

 

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

 

import com.alibaba.fastjson.JSON;

 

public class mybatisdemo {

public static void main(String[] args) {

 

String resource = "mybatis.xml";

 

// 加载mybatis 的配置文件（它也加载关联的映射文件）

InputStream is = mybatisdemo.class.getClassLoader().getResourceAsStream(resource);

 

// 构建sqlSession 的工厂

SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);

 

 SqlSession session=factory.openSession(true);

 

 MapperCls mapper=session.getMapper(MapperCls.class);

 @SuppressWarnings("rawtypes")

// List li  =mapper.queryall();

   List li  =mapper.query("select * from tab1");

 System.out.println( JSON.toJSONString(li));

 session.close();

// = session.selectList(arg0);

 

}

 

}

 

1. 错误解决
   1. mybatis The error may involve defaultParameterMap

    @Select("select  * from tab1")

public List<Map>   queryall();

 

要定义List<Map> ，不要只是list

 

 

1. 1. org.apache.ibatis.reflection.ReflectionException: There is no getter for property named

 

解决方法:在参数前加@Param标签

public List<Userinfo> findAll(@Param("sname") String sname);

1. ref

 

Mybatis框架基于注解的方式，实对数据现增删改查 - G-&-D - 博客园.html