spring复习20141221

1.applicationContext.xml

<?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"><bean id="helloDao" class="com.qing.HelloDAO"></bean><bean id="hello" class="com.qing.Hello"><property name="helloDAO" ref="helloDao">  </property></bean><bean id="loggerBean" class="com.aspect.LoggerBean"> </bean> <bean id="exceptionBean"  class="com.aspect.ExceptionLogger"></bean>    <aop:config>         <aop:pointcut id="comqing" expression="within(com.qing.*)"/>         <!-- 采用AOP配置将LoggerBean组件 作用到某一批Service的方法上 -->         <aop:aspect id="loggerAspect" ref="loggerBean">             <aop:around method="loggerOperation" pointcut-ref="comqing"/>        </aop:aspect>              <!-- 异常处理 -->         <aop:aspect id="exceptionAspect"  ref="exceptionBean">             <aop:after-throwing method="execute"   pointcut-ref="comqing"  throwing="ex"/> </aop:aspect>    </aop:config></beans>

2.log4j.properties

log4j.rootLogger=warn,myconsole 
log4j.appender.myconsole=org.apache.log4j.ConsoleAppender 
log4j.appender.myconsole.layout=org.apache.log4j.SimpleLayout

3.test1

package com.test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.qing.Hello;public class Test1 {public static void main(String[] args) {// TODO Auto-generated method stub//根据conf指定的配置实例化spring容器         String conf = "applicationContext.xml";         ApplicationContext ac =new ClassPathXmlApplicationContext(conf); //通过spring容器获取定义的Bean对象         Hello h =(Hello)ac.getBean("hello");         //使用       System.out.println(h.findA("spring"));}}

4.test2

package com.test;import org.apache.log4j.Logger;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.LoggerBean.java

package com.aspect;import org.aspectj.lang.ProceedingJoinPoint;public class LoggerBean {// 利用环绕通知实现/** * 记录操作日志 ProceedingJoinPoint 连接点对象 */public Object loggerOperation(ProceedingJoinPoint pjp) throws Throwable {// 获取当前指行的类型名String className = pjp.getTarget().getClass().getName();// 获取当前执行的方法名String methodName = pjp.getSignature().getName();System.out.println("你执行" + className + "类的" + methodName + "方法!!!!!之前!!!!!!!!!!!");Object obj = pjp.proceed();// 执行目标对象方法// ---------在目标方法之后执行-------------System.out.println("你执行" + className + "类的" + methodName + "方法!!!!之后！！！！！！！！！！");// String key = className+"."+methodName;// String msg = PropertiesUtil.getValue(key);// System.out.println();return obj;}}

6.ExceptionLogger.java

package com.aspect;import org.apache.log4j.Logger;public class ExceptionLogger {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.Hello.java 

package com.qing;public class Hello {private String s;public void setS(String s) {this.s = s;}private HelloDAO helloDAO;public void setHelloDAO(HelloDAO helloDAO) {this.helloDAO = helloDAO;}public String findA(String a){if(helloDAO!=null){//return helloDAO.findById(123);return s;}return a;}}

8.HelloDAO.java

package com.qing;public class HelloDAO {public String findById(int id){//throw new NullPointerException();//用于测试aop异常异常处理return "获得了id为"+id+"的数据";}}