通過代碼解決tomcat配置定時任務(wù)是發(fā)生重復加載的問題

1、通過代碼解決tomcat配置定時任務(wù)是發(fā)生重復加載的問題目錄結(jié)構(gòu)fg deployment descriptor: wcbtej殳 jax-ws web services java resources* u? src th com.ele jj singleton.java t| testjob.java |t| ti m erm a nagcr.j ava libraries javascript resources deployed resources £>build g? target webcontent dmeta-izf昌 manifest.mf &web-

2、infa glib lz>spring|x| context-svr.xinlx web.xml|m| pom.xml代碼文件l.testjob.classpackagecom.ele;importjava.util.map;publicclasstestjob publicstaticvolatileintflag = 0; publicstatic map<string,integer>flagss ;publicsynchronizedvoid execute () singleton si = singleton.getsingleton();system.out.p

3、rintin(si);synchronized(si)if(si.getflag()=0) system, out. print in ( nchushihua h+test job. f"g+); si setflag(1);)elsesystem.out.printin(hbuzhixingn+testjob.flag+);2. singlcton. classpackagecom.ele;publiuclass singleton privatevolatileintflag = 0; privatevolatilestatic singleton singleton; pri

4、vate singleton ()publicstatic singleton getsingleton ()if (singleton = null) synchronized (singletonclass) if (singleton = null) sing丄eton = new singleton ();returnsingleton;* return the flag*/publicintgetflag ()returnflag;* gparam flag the flag to set*/publicvoidsetf丄ag(intflag) this.flag = flag;3.

5、 web. xml 文件<?xmlversion="1 0"encoding二"utf-8"?><we b-appxmlns : xsi= "http: /www. w3. org/2 001/xmlschema-instance99 xmlns= nxsi:schemalocation=" version= "3.0 "><context-param><param-name>contextconfiglocatio rk/pbrmm-nmme<param-va

6、lue>/web-inf/spring/context-svr.xml</param-value></context-p3ram><listener><listener-class>orgspringframeworkwebcontextcontextloaderl istener</listener-class></listener><servlet><servlet-name>appservlet/servletnmme><servlet-class>orgspringf

7、rameworkwebservlet.dispatcherservl et</servlet-class><init-param><pa ram-name > co nt extconf igloca tio n</p3i?am-narne><param-value>/web-inf/spring/context-svrxml</param-value></init-param><load-on-startup>l</load-on-startup></servlet><

8、;servlet-mapping><servlet-name>appservleservletname<url-pattern>/</url-pbttern></servlet-mapping></web-app>4 context_svr . xm丄文件<?xmlversion= "1.0 ,rencoding= "utf-8 "?><beansxmlns= nhttp: /wwvj . spring framework. org/schema/beans " xmln

9、s:xsi= nhttp:/www.w3org/2001/xmlsch ema-instance" xsi:schemalocation="/schema/beans/schema/beans/spring-beans.xsdn> <k> eanclass="org.springframeworkscheduling.quartz.schedulerfac torybean”<propertyname="trigge

10、rs"> <list><refbean= 99test trigger n/></list></property><propertyname= "autostartup nvalue= 9ftrue "/></bean><k> eanid= "testtrigger rrc las s= fforg. spring framework. schedu ling quartz crontri ggerbean 99><propertyname= 99job

11、detail rrref= "testjobdetail n/><property"cro門express丄on" / 0 * * * * ?"/><! 一一 每隔 1秒鐘觸發(fā)i次-></bean><beanid= 99test jobdetail rrclass= "org. springframework scheduling. q uartz.methodlnvokingjobdetailfactorybean"><propertyname= "targetobject rfref= "test job "/><propertyname="targetmethod"execute"/><propertyname= "concurrentnvalue= nfalse"/<!是否允許任務(wù)并發(fā)執(zhí)行。當值為falsehj',表示必須等到前一個線程