在春季使用 AOP 进行日志记录?

问题描述

我是办公室的新人.所以没有给我的指导.

I am new to spring in my office . So there is no guidance for me.

我需要使用 log4j 使用 AOP 实现日志记录.

I need to implement the logging with the AOP using the log4j.

我已经在基本的 spring MVC 示例中实现了没有 AOP 的日志记录?

I have implemented the logging without AOP in basic spring MVC example ?

也在AOP 中使用aspectJ 做了小样本，没有记录(只是做了Sysout)?

Also did the small sample in AOP using the aspectJ without logging (just made the Sysout) ?

我不知道如何整合它?

谁能给我一个创业的想法?

Can any one please give me a start up idea?

好的答案绝对值得赞赏......

Good answers are definitely appreciated ...

推荐答案

Spring 使我们可以很容易地使用 AOP.这是一个简单的日志记录示例:

Spring makes it really easy for us to make use of AOP. Here's a simple logging example:

@Aspect
public class MyLogger {

    private Logger log = Logger.getLogger(getClass());

    @After("execution(* com.example.web.HomeController.*(..))")
    public void log(JoinPoint point) {
        log.info(point.getSignature().getName() + " called...");
    }
}

然后只需配置您的 applicationContext.xml(或等效文件):

Then simply configure your applicationContext.xml (or equivalent):

    <aop:aspectj-autoproxy>
        <aop:include name="myLogger"/>
    </aop:aspectj-autoproxy>

    <bean id="myLogger" class="com.example.aspect.MyLogger"/>

您会注意到在 MyLogger 类中，我在方法正上方指定了 @After.这称为通知，它基本上指定将在相关方法之后调用此日志"方法.其他选项包括 @Before、@Around、@AfterThrowing.

You'll notice in the MyLogger class that I specified @After right above the method. This is called the advice and it basically specifies that this 'log' method will be called after the method in question. Other options include @Before, @Around, @AfterThrowing.

表达式 "execution(* com.example.web.HomeController.*(..))" 被称为切入点表达式并指定我们的目标(在这种情况下所有方法HomeController 类).

The expression "execution(* com.example.web.HomeController.*(..))" is called a pointcut expression and specifies what we're targeting (in this case all methods of the HomeController class).

附言aop 命名空间(xmlns:aop="http://www.springframework.org/schema/aop")和模式位置(取决于版本)需要是添加到您的 applicationContext.xml 的顶部.这是我的设置:

P.S. The aop namespace (xmlns:aop="http://www.springframework.org/schema/aop") and the schema location (version dependent) would need to be added to your applicationContext.xml right at the top. Here is my setup:

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">

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