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部署war时，遇到下面异常：
exception org.apache.jasper.JasperException: Unable to compile class for JSP org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:604) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:723) com.sk.skkx.common.SessionAreaQueryFilter.doFilter(SessionAreaQueryFilter.java:167) com.sk.skkx.common.CookieLoginFilter.doFilter(CookieLoginFilter.java:179) com.sk.admin.common.filter.LoginFilter.doFilter(LoginFilter.java:62) org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176) org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145) org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:390) com.zl.common.SetCharEncodingFilter.doFilter(SetCharEncodingFilter.java:73) root cause java.io.IOException: tmpFile.renameTo(classFile) failed org.apache.jasper.compiler.SmapUtil$SDEInstaller.install(SmapUtil.java:246) org.apache.jasper.compiler.SmapUtil.installSmap(SmapUtil.java:165) org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:458)
解决：
找到war解压开的lib里面的servlet-api.jar的类似版本，比如：servlet-api-2.5.jar。然后使用tomcat的lib中的servlet-api.jar替换。然后重启tomcat。
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org.apache.jasper.JasperException: Unable to compile class for JSP
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原文地址：http://blog.csdn.net/forlong401/article/details/47045561
