哪里有錯啊 ，GetMapProperty gp = new GetMapProperty();里面的getter，setter方法大小寫沒問題，有時候還會在報 ?method not found：isButton ? 錯誤。求大神告知一下吧，try { GetMapProperty gp = new GetMapProperty(); System.out.println("之前 ：　"+ gp); Map<String,String[]> map = request.getParameterMap(); for (Entry<String, String[]> m : map.entrySet()) { String name = m.getKey(); String [] values = m.getValue(); PropertyDescriptor pdp = new PropertyDescriptor(name, GetMapProperty.class); Method w = pdp.getWriteMethod(); if(values.length==1){ w.invoke(gp, values[0]); }else{ w.invoke(gp, (Object)values); } } System.out.println("之后 ：　"+ gp); } catch (Exception e) { e.printStackTrace(); }錯誤 ：java.lang.IllegalArgumentException: argument type mismatch at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.GetMap.doGet(GetMap.java:32) at com.GetMap.doPost(GetMap.java:48) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:744)