struts 学习之问一

今天在进行struts全局类型和局部类型转换时，发现一个问题，如下：

当输入一个点的坐标时，我使用全局转换提示错误，找不到类，当改变成局部类型转换时，可以成功转换，不知道这个是什么原因，难道全局不可以应用到局部？

遇到的错误如下：

Error setting expression 'point' with value '[Ljava.lang.String;@a6af6e'

ognl.MethodFailedException: Method "setPoint" failed for object com.song.action.PointAction@bf7916 [java.lang.NoSuchMethodException: com.song.action.PointAction.setPoint([Ljava.lang.String;)]

at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1305)

at ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java:1494)

at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:85)

at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162)

at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27)

at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2332)

at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.setProperty(CompoundRootAccessor.java:78)

at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2332)

at ognl.ASTProperty.setValueBody(ASTProperty.java:127)

at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)

at ognl.SimpleNode.setValue(SimpleNode.java:301)

at ognl.Ognl.setValue(Ognl.java:737)

at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:234)

at com.opensymphony.xwork2.ognl.OgnlValueStack.trySetValue(OgnlValueStack.java:183)

at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:170)

at com.opensymphony.xwork2.ognl.OgnlValueStack.setParameter(OgnlValueStack.java:148)

at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:318)

at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:231)

at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:239)

at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)

at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:161)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)

at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:563)

at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)

at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)

at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)

at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)

at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)

at java.lang.Thread.run(Thread.java:662)

Caused by: java.lang.NoSuchMethodException: com.song.action.PointAction.setPoint([Ljava.lang.String;)

at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1246)

... 63 more

认真查找问题，方才发现，原来是全局变量的properities文件配置错误，改正方法：

全局：对所有action转换类型起作用

在src下创建xwork-conversion.properties文件

内容为：java.util.Date=cn.test.type.converter.DateTypeConverter

疑问，为什么在进行list<Point> 类型的对象转换时，用局部的的point =com.song.convert.PointConvert3 可以实现，用全局的test.song.bean.Point=com.song.convert.PointConvert3 进行配置时就返回的全是null？？？