spring用aop记录异常日志

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本文介绍如何使用Log4j进行日志配置，并通过Spring AOP实现异常信息的日志记录。具体步骤包括引入Log4j依赖、创建配置文件、编写测试类、定义异常处理Aspect等方面。

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1.导入log4j的jar包

2.在src目录下新建log4j.properties文件

3.在log4j.properties文件中写

#--------console(将日志输出在控制台)-----------
log4j.rootLogger=warn,myconsole
log4j.appender.myconsole=org.apache.log4j.ConsoleAppender
log4j.appender.myconsole.layout=org.apache.log4j.SimpleLayout
#---------file(输出在文件中)------------
log4j.rootLogger=warn,myfile
log4j.appender.myfile=org.apache.log4j.FileAppender
log4j.appender.myfile.File=D:\\log.txt
log4j.appender.myfile.layout=org.apache.log4j.SimpleLayout
#---------file(输出在html中)------------
log4j.rootLogger=warn,myfile
log4j.appender.myfile=org.apache.log4j.FileAppender
log4j.appender.myfile.File=E\:\\error.htm
log4j.appender.myfile.layout=org.apache.log4j.HTMLLayout

4.测试

public class Test2 {
    static Logger logger =   Logger.getLogger(Test2 .class);
    public static void main(String[] args) {
        logger.debug("调试信息");
        logger.info("普通信息");
        logger.warn("警告信息");
        logger.error("错误信息");
        logger.fatal("致命信息");
    }
}

5.写异常处理的aspect方面类 ExceptionLogger

6.类中写方法

    public void mypoint(){
    }
    /**
     * 将异常信息记录到文件中
     * @param ex 目标对象方法抛出的异常对象
     */
    public void execute(Exception ex){
        System.out.println("====记录异常信息=====");
        StackTraceElement[] els = ex.getStackTrace();
        Logger logger = Logger.getLogger(this.getClass());
        logger.error(ex.getClass().getName());
        logger.error(els[0]);//利用Log4j工具输出错误
    }

7.spring配置文件中加入

<bean id="exceptionBean" class="aop.ExceptionLogger"></bean>

<aop:aspect id="exceptionAspect" ref="exceptionBean">
<aop:after-throwing method="execute" pointcut-ref="servicePointcut" throwing="ex"/>
</aop:aspect>

完整的配置文件例子:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
             http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
             http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
             http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd">

<aop:config>
  <aop:pointcut id="servicePointcut" expression="within(action.*)" />
  <aop:aspect id="loggerAspect" ref="loggerBean">
   <aop:around method="loggerOperation" pointcut-ref="servicePointcut" />
  </aop:aspect>
  <aop:aspect id="exceptionAspect" ref="exceptionBean">
   <aop:after-throwing method="execute" pointcut-ref="servicePointcut"
    throwing="ex" />
  </aop:aspect>
</aop:config>

</beans>

8.制造异常

throw new NullPointerException();

9.测试

@Test
public void testSpring(){
    String[] conf = {"applicationContext.xml"};
    ApplicationContext ac =new ClassPathXmlApplicationContext(conf);
    OneAction abc= (OneAction) ac.getBean("one");
     abc.execute();
}