mybatis学习(4)：工具类和实体类的创建

 

配置文件

db.properties
jdbc.driver=com.oracle.jdbc.OracleDriver
 jdbc.url=jdbc:oracle:thin:@127.0.0.1:1521:wiicare
 jdbc.username=wiicare
 jdbc.password=Mdsd123
 log4j.properties### 设置###
 log4j.rootLogger = ERROR,stdout
  
 ### è¾åºä¿¡æ¯å°æ§å¶æ¬ ###
 log4j.appender.stdout = org.apache.log4j.ConsoleAppender
 log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
 log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
 log4j.category.org.springframework.beans.factory=ERROR
 mybatis-config.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">
  <configutation>
  <!-- 引入数据库配置 -->
  <properties resource="db.properties"></properties>
  <!-- 定义别名 -->
  <typeAliases>
  <typeAlias type="com.geyao.mybatis.pojo.Blog" alias="Blog"></typeAlias>
  </typeAliases>
  
  <!-- 定义数据源 -->
  <environments default="">
  <environment id="development">
  <dataSource type="POOLED">
  <property name="driver" value="${jdbc.driver}"></property>
  <property name="url" value="${jdbc.url}"></property>
  <property name="username" value="${jdbc.username}"></property>
  <property name="password" value="${jdbc.password}"></property>
  </dataSource>
  
  </environment>
  </environments>
  
  
  <mappers>
  
  <package name="com.geyao.mabatis.mapper"></package>
  </mappers>
  </configutation>
 BlogMapper.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="com.geyao.mybatis.mapper.BlogMapper">
  <!-- statement -->
  <select id="selectBlog" parameterType="int" resultType="Blog">
  
  select * from Blog where id=#{id}
  </select>
  
  </mapper>
 BlogMapper类package com.geyao.mybatis.mapper;
  
 import com.geyao.mybatis.pojo.Blog;
  
 public interface BlogMapper {
     Blog selectBlog(Integer id);
     
 }
 Blog类package com.geyao.mybatis.pojo;
  
 public class Blog {
     private Integer id;
     private String title;
     private int authorId;
     private String state;
     private Boolean featured;
     private String style;
     public Blog(Integer id, String title, int authorId, String state, Boolean featured, String style) {
         super();
         this.id = id;
         this.title = title;
         this.authorId = authorId;
         this.state = state;
         this.featured = featured;
         this.style = style;
     }
     public Integer getId() {
         return id;
     }
     public void setId(Integer id) {
         this.id = id;
     }
     public String getTitle() {
         return title;
     }
     public void setTitle(String title) {
         this.title = title;
     }
     public int getAuthorId() {
         return authorId;
     }
     public void setAuthorId(int authorId) {
         this.authorId = authorId;
     }
     public String getState() {
         return state;
     }
     public void setState(String state) {
         this.state = state;
     }
     public Boolean getFeatured() {
         return featured;
     }
     public void setFeatured(Boolean featured) {
         this.featured = featured;
     }
     public String getStyle() {
         return style;
     }
     public void setStyle(String style) {
         this.style = style;
     }
     
 }
 MyBatisUtil类package com.geyao.mybatis.util;
  
 import java.io.IOException;
 import java.io.InputStream;
  
 import javax.annotation.Resource;
  
 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.omg.CORBA.PUBLIC_MEMBER;
  
 import jdk.internal.dynalink.beans.StaticClass;
  
 public class MyBatisUtil {
     private static SqlSessionFactory sqlSessionFactory=null;
     static {
         
         try {
             InputStream in = Resources.getResourceAsStream("mybatis-config.xml");
             sqlSessionFactory = new SqlSessionFactoryBuilder().build(in);
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
     private MyBatisUtil() {}
         public static SqlSession getSqlSession() {
             return sqlSessionFactory.openSession();
         
     }
 }