Actionform问题求教！

从一表单中用actionform取出数据设置类型为double型
<form .....>
<input type="text" name="value1">
<input type="text" name="value2">
...........
Actionform中如下：private doublel value1;
private double2 value2;
..........public void setValue1(double Value1){.........}public double getValue1(){ return value1;}
...........
编译是一切正常，但是当用getxx()方法从actionform 中取数据是去发生异常错误！没有注册getValue1()方法！
求救！！！！程序大概就是：
从一个表单中输入两个数据进行简单的运算，采用struts框架！当在actionform中定义为int类型的时候一切正常，但是当定义为double类型的时候getxx()方法发生错误！是否actionform中没有从string装换为double型的转换器！（用long型发生同样的错误）。

解决方案 »

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多贴点出来看看,可以转化为double的
private doublel value1;
private double2 value2;
double1,double2是什么类型？
<input type="text" name="value1">
<input type="text" name="value2">
对么？不用结束符的？private doublel value1;
private double2 value2;
对么？struts1还是2?怎么又有actionForm又有转换器？
不要意思!那个写错了!
是double型!我现在在机房!源码等下贴出来!
不好意思！电信那个垃圾！一直没网！
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%><img src="pictures/logo5.bmp"></img>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<h1>
<p align="center">
欢迎进入到微型计算器测试页面
</p>
<p align="center">
<img alt="" src="pictures/00052.jpg">
</p>
</h1>
<hr size="5" color="#15a06d" width="80%">
<p>
 
</p>
<form action="result.do" method="get">
<center>
<input type="text" name="NO_1" size="12" maxlength="12">
<select name="type">
<option selected="selected">+</option>
<option>-</option>
<option>*</option>
<option>/</option>
</select>
<input type="text" size="12" name="NO_2"  maxlength="12">
<input type="submit" value="=">
</center>
</form>
<img alt="" src="pictures/00052.jpg"><img alt="" src="pictures/logo2.png"><br><br><br> </body>
</html>Struts-config。xml配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<data-sources />
<form-beans>
<form-bean name="calform" type="com.longdpt.computer.computeractionForm"></form-bean>
</form-beans>
<global-exceptions />
<global-forwards />
<action-mappings>
<action path="/result" type="com.longdpt.computer.computerAction"
name="calform" input="jisuan.jsp" scope="request" attribute="calform">
<forward name="success" path="/result.jsp"></forward>
<forward name="failure" path="/errer.jsp"></forward>
</action>
<action path="/a" forward="/jisuan.jsp"></action>
</action-mappings>
<message-resources parameter="com.longdpt.computer.ApplicationResources" />
</struts-config>
actionform：如下package com.longdpt.computer;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;import com.sun.java_cup.internal.internal_error;public class computeractionForm extends ActionForm { /**
*
*/ private double NO_1;

private double NO_2;
private String type;
public double getNO_1() {
return NO_1;
}
public void setNO_1(double no_1) {
NO_1 = no_1;
}
public double getNO_2() {
return NO_2;
}
public void setNO_2(double no_2) {
NO_2 = no_2;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}

}
action如下：package com.longdpt.computer;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;import com.sun.java_cup.internal.internal_error;public class computerAction extends Action { public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {

/*
* 取出表单数据
*/
ActionForward forward =new ActionForward();
double NO_3=0;
try {

computeractionForm form2 =(computeractionForm)form;

double NO_1=form2.getNO_1();
System.out.println("NO_1:"+NO_1);
double NO_2=form2.getNO_2();
String type=form2.getType();

if ("+".equals(type)) {
NO_3=NO_1+NO_2;
System.out.println("NO_3:"+NO_3);
forward =mapping.findForward("success");
}else {
forward=mapping.findForward("failure");
}
} catch (Exception e) {
e.printStackTrace();
}
String result;
result=(new Double(NO_3)).toString();
System.out.println(result);
request.setAttribute("result",result);
return (forward);

}}
错误如下：
type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.NoSuchMethodError: com.longdpt.computer.computeractionForm.getNO_1()I
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause javax.servlet.ServletException: java.lang.NoSuchMethodError: com.longdpt.computer.computeractionForm.getNO_1()I
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:862)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
org.apache.jsp.result_jsp._jspService(result_jsp.java:95)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause java.lang.NoSuchMethodError: com.longdpt.computer.computeractionForm.getNO_1()I
org.apache.jsp.result_jsp._jspService(result_jsp.java:71)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.
--------------------------------------------------------------------------------Apache Tomcat/6.0.20
个人感觉这个问题好像是通过配置文件进行反射的时候出的错误，请检查 web.xml 及struts-config.xml文件的配置
感觉是setter和getter的变量命名规则错误了,把name="NO_1"改为name="no_1" name="NO_2"为name="no_2" private double no_1;
private double no_2;
private String type; public double getNo_1() {
return no_1;
}
public void setNo_1(double no_1) {
this.no_1 = no_1;
}
public double getNo_2() {
return no_2;
}
public void setNo_2(double no_2) {
this.no_2 = no_2;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
刚帮你测了下,没问题!
这是打印结果,我没建你的跳转结果页面:
NO_1:10.0
NO_3:20.0
20.0
javax.servlet.ServletException: java.lang.NoSuchMethodError: com.longdpt.computer.computeractionForm.getNO_1()I
对于这个问题,你试着重启下服务器试试
NO_1,NO_2有问题，识别不了getNO_1()这个方法，把N改成n试试
我在myeclipse+tomcat6下试了,可以的
在ActionForm中定义属性时最好都定义成字符串类型的，再在后台进行转换比较好。
命名是没有问题的，只是说不符合规范而已，如果他变量的第二个字母是小写的话才会有问题。
struts中字符串转基本类型应该是可以的，是不是jar包问题，我建议form中的成员变量都都定义成字符串比较好，要用到的时候，可以再后台通过API进行转换。还有一种比较好的设计：将一个功能中的表单信息都封装到一个类中，在ActionForm中只需要定义这个对象就行了。
<html:text property="变量名.属性名" value=""/>这里的变量名是在ActionForm中的那个变量
呵呵，把NO_1改为no_1的确是没有问题了！但是为啥把NO_1定义为int性的时候为什么就没有问题，运行就一切正常呢！