Mybatis总结

jdbc.properties

 driver=com.mysql.jdbc.Driver
 url=jdbc:mysql://127.0.0.1:3306/testdb
 username=root
 password=wjb

log4j.properties

 log4j.rootLogger=DEBUG,CONSOLE,file
 #log4j.rootLogger=ERROR,ROLLING_FILE
 log4j.logger.cn.jbit.dao=debug
 log4j.logger.com.ibatis=debug
 log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
 log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
 log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
 log4j.logger.java.sql.Connection=debug
 log4j.logger.java.sql.Statement=debug
 log4j.logger.java.sql.PreparedStatement=debug
 log4j.logger.java.sql.ResultSet=debug
 log4j.logger.org.tuckey.web.filters.urlrewrite.UrlRewriteFilter=debug

 ######################################################################################
 # Console Appender  \u65e5\u5fd7\u5728\u63a7\u5236\u8f93\u51fa\u914d\u7f6e
 ######################################################################################
 log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
 log4j.appender.Threshold=error
 log4j.appender.CONSOLE.Target=System.out
 log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
 log4j.appender.CONSOLE.layout.ConversionPattern= [%p] %d %c - %m%n

 ######################################################################################
 # DailyRolling File  \u6bcf\u5929\u4ea7\u751f\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\uff0c\u6587\u4ef6\u540d\u683c\u5f0f:log2009-09-11
 ######################################################################################
 log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
 log4j.appender.file.DatePattern=yyyy-MM-dd
 log4j.appender.file.File=log.log
 log4j.appender.file.Append=true
 log4j.appender.file.Threshold=error
 log4j.appender.file.layout=org.apache.log4j.PatternLayout
 log4j.appender.file.layout.ConversionPattern=%d{yyyy-M-d HH:mm:ss}%x[%5p](%F:%L) %m%n

 log4j.logger.com.opensymphony.xwork2=error  

mybatis-config.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="jdbc.properties">

      </properties>
      <environments default="development">
          <environment id="development">
             <transactionManager type="JDBC"/>
              <dataSource type="POOLED">
                  <property name="driver" value="${driver}"/>
                  <property name="url" value="${url}"/>
                  <property name="username" value="${username}"/>
                  <property name="password" value="${password}"/>
              </dataSource>
          </environment>
      </environments>

      <mappers>
          <mapper resource="dao/UserMapper.xml"/>
      </mappers>
  </configuration>

UserMapper.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 

 <mapper namespace="dao.UserMapper">
     <select id="count" resultType="int">
         select count(1) from user
     </select>

 </mapper>

UserTest

 package test;

 import static org.junit.Assert.*;

 import java.io.IOException;
 import java.io.InputStream;

 import org.apache.ibatis.io.Resources;
 import org.apache.ibatis.session.SqlSession;
 import org.apache.ibatis.session.SqlSessionFactory;
 import org.apache.ibatis.session.SqlSessionFactoryBuilder;
 import org.apache.log4j.Logger;
 import org.junit.Test;

 public class UserTest {
     private Logger logger = Logger.getLogger(UserTest.class);

     @Test
     public void countTest() {
         String resource = "mybatis-config.xml";
         int count = 0;
         SqlSession sqlSession = null;
         //1,读取配置文件mybatis-config.xml输入流
         try {
             InputStream is = Resources.getResourceAsStream(resource);
             //2,创建sqlsessionfactory
             SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);
             //3,创建sqlsession
             sqlSession =     factory.openSession();
             //4,调用mapper配置文件
             count = sqlSession.selectOne("dao.UserMapper.count");

             logger.debug(count);
         } catch (IOException e) {
             e.printStackTrace();
         }finally{
             sqlSession.close();
         }

     }

 }