ssh开发jasper碰到的异常 Errors were encountered when compiling report expressions class

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ssh开发jasper碰到的异常 Errors were encountered when compiling report expressions class3

net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file:
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:4: 软件包 net.sf.jasperreports.engine 不存在
import net.sf.jasperreports.engine.*;
^
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:5: 软件包 net.sf.jasperreports.engine.fill 不存在
import net.sf.jasperreports.engine.fill.*;
^
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:14: 软件包 net.sf.jasperreports.engine 不存在
import net.sf.jasperreports.engine.*;
^
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:15: 软件包 net.sf.jasperreports.engine.data 不存在
import net.sf.jasperreports.engine.data.*;
^
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:21: 找不到符号
符号：类 JREvaluator
public class monitorReport_1264644061578_67995 extends JREvaluator
                                                       ^
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:28: 找不到符号
符号：类 JRFillParameter
位置：类 monitorReport_1264644061578_67995
    private JRFillParameter parameter_REPORT_RESOURCE_BUNDLE = null;
            ^
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:29: 找不到符号
符号：类 JRFillParameter
位置：类 monitorReport_1264644061578_67995
    private JRFillParameter parameter_REPORT_CLASS_LOADER = null;
            ^
E:\YangPeiHai\resin3.026\resin-3.0.26\monitorReport_1264644061578_67995.java:30: 找不到符号
符号：类 JRFillParameter
位置：类 monitorReport_1264644061578_67995
    private JRFillParameter parameter_REPORT_FORMAT_FACTORY = null;
            ^

       at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:193)
       at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:219)
       at net.sf.jasperreports.engine.JasperCompileManager.compileReportToFile(JasperCompileManager.java:135)
       at net.sf.jasperreports.engine.JasperCompileManager.compileReportToFile(JasperCompileManager.java:117)
       at com.eweb.video.action.MonitorVideoAction.printMonitorVideo(MonitorVideoAction.java:222)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:440)
       at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:279)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
       at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)
       at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:249)
       at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationIntercep
       at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
       at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
       at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:148)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:93)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
       at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
       at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)

折腾了半天，终于整出来了，跟有相同不幸遭遇的朋友共享一下。
在JasperCompileManager.compileReportToFile方法前面加上
String libsPath=ServletActionContext.getServletContext().getRealPath("WEB-INF/lib")+"/jasperreports-3.0.0.jar";//也就是相对于磁盘的路径
JRProperties.setProperty(JRProperties.COMPILER_CLASSPATH, libsPath);

搞定。
看了网上很多资料，说是jvm加载不到jasperreports-3.0.0.jar,要在环境变量classPath里面添加jasperreports-3.0.0.jar，但我测试了，还是不行。希望有高手看了，能指点一下！

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