{"id":1007,"date":"2010-10-02T00:33:38","date_gmt":"2010-10-02T00:33:38","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=1007"},"modified":"2010-10-02T00:33:38","modified_gmt":"2010-10-02T00:33:38","slug":"aspectj-aop%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2010\/10\/02\/aspectj-aop%e5%ae%9e%e7%8e%b0\/","title":{"rendered":"AspectJ AOP\u5b9e\u73b0"},"content":{"rendered":"

Spring AspectJ\u65b9\u5f0f\u63d0\u4f9b\u4e86\u5728\u4ee3\u7801\u4e2d\u8fdb\u884cAOP\u7684\u65b9\u5f0f\uff0c\u5b9c\u4e8e\u96c6\u4e2d\u5316\u7ba1\u7406PointCut,\u4e0d\u7528\u518d\u5199\u597d\u4ee3\u7801\u540e\uff0c\u5728xml\u4e2d\u914d\u7f6e\u4e00\u5927\u4e32\u3002
\nAspectJ\u662f\u4e00\u4e2a\u9762\u5411\u5207\u9762\u7684\u6846\u67b6\uff0c\u5b83\u6269\u5c55\u4e86Java\u8bed\u8a00\u3002AspectJ\u5b9a\u4e49\u4e86AOP\u8bed\u6cd5\u6240\u4ee5\u5b83\u6709\u4e00\u4e2a\u4e13\u95e8\u7684\u7f16\u8bd1\u5668\u7528\u6765\u751f\u6210\u9075\u5b88Java\u5b57\u8282\u7f16\u7801\u89c4\u8303\u7684Class\u6587\u4ef6.<\/p>\n

AspectJ\u8bed\u6cd5<\/p>\n

\u901a\u914d\u7b26<\/p>\n

*? \u8868\u793a\u4efb\u4f55\u6570\u91cf\u7684\u5b57\u7b26\uff0c\u9664\u4e86.
\n.. \u8868\u793a\u4efb\u4f55\u6570\u91cf\u7684\u5b57\u7b26\u5305\u62ec\u4efb\u4f55\u6570\u91cf\u7684.
\n+? \u63cf\u8ff0\u6307\u5b9a\u7c7b\u578b\u7684\u4efb\u4f55\u5b50\u7c7b\u6216\u8005\u5b50\u63a5\u53e3???
\n!? \u6392\u9664
\n||\u548c&& \u6216\uff0c\u4e0e<\/p>\n

\u4f8b\uff1a
\njava.*.Date???? \u7c7b\u578bDate\u5728\u4efb\u4f55\u76f4\u63a5\u7684java\u5b50\u5305\u4e2d\uff0c\u5982ava.util.Date\u548cjava.sql.Date
\njavax..*Model+? \u6240\u6709javax\u5305\u6216\u8005\u5b50\u5305\u4e2d\u4ee5Model\u7ed3\u5c3e\u7684\u7c7b\u578b\u548c\u5176\u6240\u6709\u5b50\u7c7b\uff0c\u5982TableModel,TreeModel\u3002
\n\uff01vector???????????????????????????? \u6240\u6709\u9664\u4e86Vector\u7684\u7c7b\u578b
\nVector|| Hashtable????????????? Vector\u6216\u8005Hashtable\u7c7b\u578b
\n!public static * banking..*.*
\n\u6240\u6709\u7684\u975epublic static \u5c5e\u6027\uff0c\u5728banking\u7684\u5305\u6216\u8005\u5b50\u5305\u4e2d
\n\u4e00\uff0c\u6ce8\u89e3\u5b9e\u73b0\u65b9\u5f0f\uff1a<\/p>\n

1\uff0c\u5b9e\u73b0\u7c7b
\npackage com.lvjian.aop;<\/p>\n

import java.util.Date;<\/p>\n

import org.aspectj.lang.annotation.Aspect;
\nimport org.aspectj.lang.annotation.Before;<\/p>\n

@Aspect??? \/\/\u6307\u5b9a\u4e0b\u9762\u7684\u7c7b\u4e3aAspect
\npublic class Log {
\nDate date = new Date();
\n@Before(“execution( * *.update(..))”)???????? \/\/\u4efb\u610f\u7c7b\u6709update\u65b9\u6cd5\u6267\u884c\u524d\u6267\u884clogUpdate\u65b9\u6cd5
\n??????????????????? \/\/@Before(“execution<\/a>( * *.update(..))”)? \u524d\u4e00\u4e2a* \u4e3aupdate\u7684\u8fd4\u56de\u7c7b\u578b\uff0c\u540e\u4e00\u4e2a * \u4e3a\u7c7b\u7684\u540d\u79f0
\npublic void logUpdate(){
\nSystem.out.println( “begin update at ” + date.getTime() );
\n}<\/p>\n

}<\/p>\n

2,\u5728applicationContext.xml\u50cf\u914d\u7f6e\u666e\u901abean\u4e00\u6837\u914d\u7f6e\u6b64\u7c7b
\n<bean id=”logAspect”
\n<\/bean><\/p>\n

\u6ce8\uff1a1,\u8981\u5728applicationContext.xml \u52a0\u5165\u5bf9AspectJ\u7684\u652f\u6301
\n<bean \/>
\n\u6216<aop:aspectj-autoproxy\/><\/p>\n

2, \u6ce8\u89e3\u6709\uff1a
\n\uff081\uff09Pointcut \u5f53@Before(“execution( * *.update(..))”)? \u591a\u65f6\uff0cexecution\u5c31\u4f1a\u7c7b\u540c\uff0c\u8fd9\u662f\u5207\u9762\uff0c\u53ef\u5b9a\u4e49\u4e00\u5207\u9762Pointcut\u89e3\u51b3\u3002
\n???? @Pointcut(“execution( * *.update(..))”)
\n??????? public void pc(){???
\n??????????? System.out.println( “@Pointcut!!! “);??
\n????? }<\/p>\n

???? @Before(value=”pc()”)
\n?????? public void logChange(){
\n?????????? System.out.println( “change!!! ” + date.getTime() );
\n}
\n\uff082\uff09\u4f20\u7edfaop \u589e\u5f3a\u7c7b\u578b\u6709MethodBeforeAdvice,AfterReturningAdvice,MethodInterceptor,ThrowsAdvice\u7b49\u63a5\u53e3,\u5bf9\u5e94\u7684\u6ce8\u89e3\u4e3a\uff1aMethodBeforeAdvice? ??? @Before
\n??????? AfterReturningAdvice? ??? @AfterReturning
\n??????? MethodInterceptor????? ??? @Around
\n??????? ThrowsAdvice??????????? ??? @AfterThrowing
\n??????????????????????????????????????????????? @After :\u65e0\u8bba\u65b9\u6cd5\u4ee5\u4f55\u79cd\u65b9\u5f0f\u7ed3\u675f\uff0c\u90fd\u4f1a\u6267\u884c\uff08\u7c7b\u4f3c\u4e8efinally\uff09
\n???????
\n?\u5e94\u7528\uff1a
\n????
\nimport java.util.Date;<\/p>\n

import org.aspectj.lang.ProceedingJoinPoint;
\nimport org.aspectj.lang.annotation.AfterReturning;
\nimport org.aspectj.lang.annotation.Around;
\nimport org.aspectj.lang.annotation.Aspect;
\nimport org.aspectj.lang.annotation.Before;
\nimport org.aspectj.lang.annotation.Pointcut;<\/p>\n

@Aspect
\npublic class Log {
\nDate date = new Date();
\n@Before(“execution( * *.update(..))”)
\npublic void logUpdate(){
\nSystem.out.println( “begin update at ” + date.getTime() );
\n}<\/p>\n

@Pointcut(“execution( * *.update(..))”)
\npublic void pc(){???
\nSystem.out.println( “@Pointcut!!! “);<\/p>\n

}<\/p>\n

@Before(value=”pc()”)
\npublic void logChange(){
\nSystem.out.println( “before change!!! “? );
\n}<\/p>\n

@AfterReturning(value=”pc()”)
\npublic void AfterlogChange(){
\nSystem.out.println( “after!!! “? );
\n}<\/p>\n

@Around(value=”pc()”)
\npublic Object AroundlogChange( ProceedingJoinPoint point ) throws Throwable{
\nSystem.out.println( “around before “? );
\nObject re = point.proceed();
\nSystem.out.println( “around after “? );
\nreturn re;
\n}<\/p>\n

@After(value=”pc()”)
\npublic void AfterlogChange() {
\nSystem.out.println( “After ?? finally “? );
\n}
\n}
\n\uff083\uff09\u6ce8\u89e3\u5bf9\u76d1\u542c\u65b9\u6cd5\u7684\u64cd\u4f5c\uff1a
\n1) \u5728\u5f62\u53c2\u4e2d\u5b9a\u4e49org.aspectj.lang.JoinPoint\u7c7b\u578b\u7684\u53c2\u6570\uff0c\u7528\u4e9b\u6765\u8bbf\u95ee\u65b9\u6cd5\u3002(\u6ce8\uff1a@Around \u7528\u7684\u662f\u662fProceedingJoinPoint\uff0c\u5b83\u662forg.aspectj.lang.JoinPoint\u7684\u4e00\u4e2a\u5b50\u7c7b)
\n???
\n??? JoinPoint \u65b9\u6cd5\u6709\uff1a
\n????? getArgs() :?? \u8fd4\u56de\u65b9\u6cd5\u5f62\u53c2
\n????? getThis() :?? \u8fd4\u56de\u4ee3\u7406\u5bf9\u8c61
\n????? getTarget() :\u8fd4\u56de\u76ee\u6807
\n????? getSignature() :\u8fd4\u56de\u6b63\u5728\u88ab\u901a\u77e5\u7684\u65b9\u6cd5\u76f8\u5173\u4fe1\u606f
\n????? toString() : \u6253\u5370\u51fa\u6b63\u5728\u88ab\u901a\u77e5\u7684\u65b9\u6cd5\u7684\u6709\u7528\u4fe1\u606f
\n@Before(value=”pc()”)
\npublic void logChange( JoinPoint jp ){<\/p>\n

System.out.println( “toString? ” + jp.toString()? );
\n}<\/p>\n

2) \u83b7\u53d6\u65b9\u6cd5\u7684\u53c2\u6570
\n? getArgs() :?? \u8fd4\u56de\u65b9\u6cd5\u5f62\u53c2
\n\u6216
\n? @AfterReturning(“execution( * *.admin(..))&&args(userName,..)”)?? \/\/args\u4e0e\u7c7b\u5e73\u884c
\n? public void AfterReturninglogAdmin( String userName ){
\n????? System.out.println( “after admin !!! ” + userName );
\n}
\n\u4e8c\uff0cXML\u914d\u7f6e\u5b9e\u73b0\u65b9\u5f0f\uff1a
\n1, \u4fee\u6539xml\u7684\u5934\u90e8\uff0c\u8ba9\u5176\u652f\u6301aop\u547d\u540d\u7a7a\u95f4\u3002
\n<beans
\nxmlns=”http:\/\/www.springframework.org\/schema\/beans<\/a>”
\nxmlns:xsi=”http:\/\/www.w3.org\/2001\/XMLSchema-instance<\/a>”
\nxmlns:aop=”http:\/\/www.springframework.org\/schema\/aop<\/a>”
\nxsi:schemaLocation=”http:\/\/www.springframework.org\/schema\/beans<\/a> http:\/\/www.springframework.org\/schema\/beans\/spring-beans-2.0.xsd<\/a>
\n??????????????? http:\/\/www.springframework.org\/schema\/aop<\/a>
\n??????????????? http:\/\/www.springframework.org\/schema\/aop\/spring-aop.xsd<\/a>“><\/p>\n

2\uff0c\u5728XML\u4e2d\u914d\u7f6e\uff1a
\n<aop:config><\/p>\n

<aop:aspect id=”log” ref=”logXML”>
\n<aop:pointcut id=”update” expression=”execution( * *.XMLBefore())” \/>
\n<aop:before pointcut-ref=”update”? method=”logUpdate” \/>
\n<\/aop:aspect><\/p>\n

<\/aop:config><\/p>\n

\u6ce8\uff1a \u8981\u53bb\u6389\u7528\u4f20\u7edf\u65b9\u5f0f\u5b9e\u73b0\u7684\u81ea\u52a8\u4ee3\u7406AutoProxyCreator \u5982:
\n<bean id=”autoPghroxyCreator”?>
\n<\/bean><\/p>\n","protected":false},"excerpt":{"rendered":"

Spring AspectJ\u65b9\u5f0f\u63d0\u4f9b\u4e86\u5728\u4ee3\u7801\u4e2d\u8fdb\u884cAOP\u7684\u65b9\u5f0f\uff0c\u5b9c\u4e8e\u96c6\u4e2d\u5316\u7ba1\u7406PointCut,\u4e0d\u7528\u518d\u5199\u597d\u4ee3\u7801 […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"class_list":["post-1007","post","type-post","status-publish","format-standard","hentry","category-spring"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/1007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=1007"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/1007\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=1007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=1007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=1007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}