mybatis中log4j.properties 打印sql语句

转载：http://blog.csdn.net/daxiang12092205/article/details/18102057

（1）将javax.servlet_1.0.0.0_2-5.jar拷贝到web-inf/lib下。

（2）在web-inf根目录下新建文件log4j.properties，配置日志输出级别、日志路径等信息。log4j.properties代码：

# debug
log4j.rootLogger=debug, LOGFILE
#log4j.debug=true

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
#设置包日志输出级别
#log4j.logger.com.xy6=INFO, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
#输出到控制台
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=INFO
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d %p [%c] - <%m>%n

#输出到文件
log4j.appender.LOGFILE=org.apache.log4j.RollingFileAppender
log4j.appender.LOGFILE.File=${webappRoot}/log/AllLog.log
log4j.appender.LOGFILE.MaxFileSize=10000KB
log4j.appender.LOGFILE.MaxBackupIndex=1000
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n

#mybatis显示SQL语句日志配置
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

（3）在web根目录下新建文件夹log，作为日志文件输出的根目录。

（4）在com.xy6下新建log4j初始化类Log4jInitServlet.java，初始化log4j配置文件中日志路径中的参数webappRoot，输出应用的磁盘路径。若log4j.properties中日志输出路径为固定值如E:\j2ee\workspace\SSM\web\log，则无需再写该类进行初始化。Log4jInitServlet.java代码：

package com.xy6;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import org.apache.log4j.PropertyConfigurator;

public class Log4jInitServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public void init() throws ServletException {
        System.out.println("---path:"+getServletContext().getRealPath("/"));
        System.setProperty("webappRoot", getServletContext().getRealPath("/"));
        PropertyConfigurator.configure(getServletContext().getRealPath("/")
                + getInitParameter("configfile"));
    }
}

（5）修改web.xml，配置log4j配置文件路径及初始化类。web.xml代码：

xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>SSMdisplay-name>

    <welcome-file-list>
        <welcome-file>/demo/demo.jspwelcome-file>
    welcome-file-list>

    <filter>
        <filter-name>struts2filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class>
    filter>
    <filter-mapping>
        <filter-name>struts2filter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    <context-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>/WEB-INF/spring.xmlparam-value>
    context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    listener>

    <servlet>
        <servlet-name>log4j config fileservlet-name>
        <servlet-class>com.xy6.Log4jInitServletservlet-class>
        <init-param>
            <param-name>configfileparam-name>
            <param-value>/WEB-INF/log4j.propertiesparam-value>
        init-param>

        <load-on-startup>1load-on-startup>
    servlet>

web-app>

（6）修改DemoAction.java，测试日志文件是否正确输出。DemoAction.java代码：

package com.xy6;

import java.util.List;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;

import com.opensymphony.xwork2.ActionSupport;

public class DemoAction extends ActionSupport {

    private static final long serialVersionUID = 1L;
    private final Logger logger = Logger.getLogger(DemoAction.class.getName());

    @Autowired
    private DemoDao demoDao;

    public String execute(){
        DemoHelper demoHelper = new DemoHelper();
        System.out.println("---curren year:"+demoHelper.getCurYear());
        DemoVO demoVO = new DemoVO();
        demoVO.setCode(1);
        List listDemoVO = demoDao.selectByCode(demoVO);
        for(int i=0;i
            System.out.println("---i:"+listDemoVO.get(i).toString());
        }
        this.testLog4j();
        return "success";
    }

    public void testLog4j(){
        logger.info("info");
        logger.warn("warn");
        logger.debug("debug");
        logger.error("error");
        logger.fatal("fatal");
    }
}

（7）重启域服务，控制台输出应用的磁盘路径。如下图：

（8）浏览器中访问http://localhost:9001/web/demo.action，页面显示demo.jsp，log文件夹下生成AllLog.log。如下图：

（9）至此，log4j配置结束。