在我们的 web开发中 我们在 对公用的 一些方法 我们需要抽取出来 这样达到 代码的冗余 今天 我利用项目上用的AOP的 实际 应用做了一个整理
首先 xml配置 扫描
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<aop:aspectj-autoproxy />
<context:component-scan base-package="com.leimingtech.platform.core.interceptors" />
<context:component-scan base-package="com.leimingtech.cms.interceptors" />
</beans>
活动切面示列
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.leimingtech.core.common.ContentClassify;
import com.leimingtech.core.base.ContextHolderUtils;
import com.leimingtech.core.entity.ContentsEntity;
import com.leimingtech.core.entity.VoteEntity;
import com.leimingtech.core.service.SystemService;
import com.leimingtech.core.service.VoteServiceI;
import com.leimingtech.core.util.StringUtils;
/**
* 投票切面类
* @author zhangxiaoqiang
*
*/
@Aspect
@Component
public class VoteInterceptor{
@Autowired
private SystemService systemService;
@Autowired
private VoteServiceI voteService;
/*
*
*所要切面的 那个方法 类
*
*/
@Pointcut("execution(public * com.leimingtech.core.service.ContentsServiceI.saveContent(..))")
public void myMethod(){};
/**
* 下面用到的是织入点语法, 看文档里面有. 就是指定在该方法前执行
* 记住下面这种通用的, *表示所有
* @param map
*/
@Before("myMethod()&&args(map,..)")
public void beforeMethod(Map<String,Object> map){
}
/**
* 正常执行完后
* 保存内容之后,保存投票
* @param map
*/
@After("myMethod()&&args(map,..)")
public void after(Map<String,Object> map){
ContentsEntity contents = (ContentsEntity) map.get("contents");
VoteEntity vote = (VoteEntity) map.get("vote");
HttpServletRequest request = ContextHolderUtils.getRequest();
//内容id
String contentsId = request.getParameter("contentsId");
if(StringUtils.isNotEmpty(contentsId)){
contents= voteService.get(ContentsEntity.class, String.valueOf(contentsId));
}
String classify = contents.getClassify();
if(ContentClassify.CONTENT_VOTE.equals(classify)){
voteService.saveVote(contents, vote);
}
}
/**
* 正常执行完后
*/
@AfterReturning("myMethod()")
public void afterReturnning(){
}
/**
* 抛出异常时才调用
*/
@AfterThrowing("myMethod()")
public void afterThrowing(){
}