spring mvc整合mybaitis和log4j

　　在上一篇博客中，我介绍了在mac os上用idea搭建spring mvc的maven工程，但是一个完整的项目肯定需要数据库和日志管理，下面我就介绍下spring mvc整合mybatis和log4j

　　一、先把需要用到的jar包配置到pom.xml上（主要是mybaitis和mysql驱动包）

 <!-- mybatis/spring包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.2</version>
    </dependency>
    <!--mysql驱动包-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.35</version>
    </dependency>
    <!-- mybatis 核心包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.3.0</version>
    </dependency>
    <!--jdbc数据源-->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>
    <!--jdbc-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>3.0.4.RELEASE</version>
    </dependency>

　　二、配置spring管理数据源，可以新建一个spring-datasource.xml

 <!-- 配置数据源 采用dbcp的方式 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${september.mysql.driver}" />
        <property name="url" value="${september.mysql.url}" />
        <property name="username" value="${september.mysql.username}" />
        <property name="password" value="${september.mysql.password}" />
        <!-- 数据里连接池的一些属性 -->
        <property name="initialSize" value="${september.dc.initialSize}" />
        <property name="minIdle" value="${september.dc.minIdle}" />
        <property name="maxActive" value="${september.dc.maxActive}" />
        <property name="maxIdle" value="${september.dc.maxIdle}" />
        <property name="maxWait" value="${september.dc.maxWait}" />
    </bean>
    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:mybatis/*.xml"></property>
    </bean>
    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.zwt.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>
    <!-- 配置Spring的事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

　　三、新建一个september.properties文件来配置数据源属性值

#mysql setting
september.mysql.driver=com.mysql.jdbc.Driver
september.mysql.url=jdbc:mysql://127.0.0.1:3306/september
september.mysql.username=root
september.mysql.password=123456
#定义初始连接数
september.dc.initialSize=1
#定义最大连接数
september.dc.maxActive=20
#定义最大空闲
september.dc.maxIdle=20
#定义最小空闲
september.dc.minIdle=1
#定义最长等待时间
september.dc.maxWait=60000

　　四、我们需要修改下工程的目录结构，如图（dao,service,controller,entity,common 各模块的功能应该不用我介绍了），spring文件夹applicationContext.xml是管理所有spring配置文件的入口

　　

　　applicationContext.xml代码

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                       http://www.springframework.org/schema/beans/spring-beans-4.1.xsd"
       default-autowire="byName">
    <!-- 引入配置文件 -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="ignoreResourceNotFound" value="false" />
        <property name="ignoreUnresolvablePlaceholders" value="true" />
        <property name="locations">
            <list>
                <value>classpath:stepmber.properties</value>
            </list>
        </property>
    </bean>
    <import resource="beans/spring-mvc.xml"/>
    <import resource="beans/spring-datasource.xml"/>
</beans>

　　五、以上四步我们就把spring管理mybatis的功能整合进来了，然后我们写个demo来测试一下配置是否正确，在mysql建立一张user表，我们在mybatis配置的路径(resource的mybaties)下新建userMapper.xml,写一个sql查询语句

　　

　　userMapp.xml代码

<?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.zwt.dao.UserDao">  <!--对应DAO的目录-->
    <select id="findByUserAndPass" resultType="com.zwt.entity.User">
        SELECT id, username,password from user  where username =#{username} and password =#{password} limit 1;
    </select>
</mapper>

　　六、然后写entity，dao和service和controller代码进行测试

　　User.java

package com.zwt.entity;

/**
 * Created by zhangwentao on 2017/4/13.
 */
public class User {

    private Integer id;

    private String username;

    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }
}

　　UserDao.java(方法名必须和mybatis定义的方法名一致)

package com.zwt.dao;

import com.zwt.entity.User;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Component;

/**
 * Created by zhangwentao on 2017/4/13.
 */
public interface UserDao {

    public User findByUserAndPass(@Param("username") String username,@Param("password")String password);

}

　　UserService.java

@Service("userService")
public class UserServiceImpl implements UserService {

    @Autowired
    private UserDao userDao;

    public User findByUserAndPass(String username, String password) {
        return userDao.findByUserAndPass(username,password);
    }
}

　UserController.java

    @RequestMapping("/login")
    public String login(HttpServletRequest request){
        String userName=request.getParameter("username");
        String password=request.getParameter("password");
       User user= userService.findByUserAndPass(userName,password);
       System.out.print(user!=null?"用户id:"+user.getId():"用户不存在");
        return user!=null?"index":"error";
    }

七、我们的编码编码工作已经完成，然后启动Tomcat开始测试

　　

　　

　　测试结果成功，说明我们已经成功整合了mybatis,拍手庆祝下

八、整合完mybatis后，我们再把日志(log4j)整理添加进去,首先在web.xml监听log4j

  <context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>classpath:log4j.properties</param-value>
  </context-param>
  <!-- 加载Spring框架中的log4j监听器Log4jConfigListener -->
  <listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>

　　配置log4j.properties

#Root Category
log4j.rootLogger=INFO,stdout,D,E

#Console
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
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

#DEBUG
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ${catalina.base}/logs/debug.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

#ERROR
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =${catalina.base}/logs/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

#IBATIS Category
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=INFO

#WS Logger for reporting

log4j.logger.WS=INFO,WS
log4j.appender.WS=org.apache.log4j.DailyRollingFileAppender
log4j.appender.WS.File=${catalina.base}/logs/ws.log
log4j.appender.WS.layout=org.apache.log4j.PatternLayout
log4j.appender.WS.DatePattern  ='.'yyyy-MM-dd
log4j.appender.WS.layout.ConversionPattern=%d-[ws] %p %t %c - %m%n

#Other Logger
log4j.logger.org.springframework=INFO
log4j.logger.com.ibatis.db=INFO
log4j.logger.net.sf.json=ERROR
log4j.logger.org.apache.cxf=DEBUG,WS

运行后，我们可以在${catalina.base}/logs/目录下找到日志文件，说明我们的日志配置成功！详细配置属性含义请参考：http://www.cnblogs.com/pigtail/archive/2013/02/16/2913195.html

小结：今天分享的是spring 整合mybatis和log4j，这个在我们实际项目中是必不可少的环节，配置按照教程一步步来是很容易的。到这里，我们其实可以真正开始开发一个项目了，下一篇，我会介绍git的使用教程(版本管理和分支)