今天在jetty下配置一个jsp模版的报表页面，报如下异常信息：

1.  
   org.apache.jasper.JasperException: PWC6345: There is an error in invoking javac. A full JDK (not just JRE) is required
2.  
   at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:92)
3.  
   at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:378)
4.  
   at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:119)
5.  
   at org.apache.jasper.compiler.Jsr199JavaCompiler.compile(Jsr199JavaCompiler.java:208)
6.  
   at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:384)
7.  
   at org.apache.jasper.compiler.Compiler.compile(Compiler.java:453)
8.  
   at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:625)
9.  
   at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
10.  
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
11.  
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
12.  
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
13.  
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:558)
14.  
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:489)
15.  
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
16.  
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
17.  
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
18.  
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:972)
19.  
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:417)
20.  
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
21.  
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:906)
22.  
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
23.  
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
24.  
    at org.eclipse.jetty.server.Server.handle(Server.java:350)
25.  
    at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:442)
26.  
    at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:910)
27.  
    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:565)
28.  
    at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:217)
29.  
    at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:46)
30.  
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:545)
31.  
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:43)
32.  
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
33.  
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
34.  
    at java.lang.Thread.run(Unknown Source)

在网上找了很多资料，主要问题还是jetty运行的jre环境配置问题，最终解决方案如下：
在eclipse—>Window—>prefence—>java—>Installed JREs,选择jre点击Edit找到jdk的安装目录，我的安装在C：Program Files/java/jdk1.7在jdk安装目录下找到jre目录，点击finish。，启动项目，访问jsp页面，一切正常。

提醒：网上的解决方案我试了不成功，主要原因就是因为jre配置环境的错误，在选择jre环境的时候，有两个选择，一个是java根目录下的jre（选择这个会不成功），一个是在jdk根目录下的jre（选择这个成功）！！