<html:link用<bean:write name="element"/>做参数问题
<center>
<jsp:useBean id= "listInformation " scope= "page " class= "com.yourcompany.struts.operation.ListInformation "> </jsp:useBean>
<TABLE border= "1 " width=550 cellspacing= "0 " cellpadding= "0 " bordercolor= "#CCCCCC " bgcolor= "#CCCCCC " style= "TABLE-LAYOUT:fixed ">
<TR bgcolor= "#9999CC ">
<TD align=center colspan=3 height=40> Please Enter Your Name And Your College </TD>
</TR>
<TR bgcolor= "#9999CC ">
<TD align=center>
<TABLE border= "1 " width= "100% " height= "100% " cellspacing= "0 " cellpadding= "3 " frame= "void "
bordercolor= "#CCCCCC " bgcolor= "#CCCCCC " style= "TABLE-LAYOUT:fixed ">
<TR> <TD align=center width= "30% " height=40> Name </TD> </TR>
<logic:iterate id= "element " name= "listInformation " property= "nameList ">
<TR bgcolor= "#FFFFFF ">
<TD align=center height= "40 ">
<bean:write name= "element "/>
</TD>
</TR>
</logic:iterate>
</TABLE>
</TD>
<TD align=center colspan=2>
<TABLE border= "1 " width= "100% " height= "100% " cellspacing= "0 " cellpadding= "3 " frame= "void "
bordercolor= "#CCCCCC " bgcolor= "#CCCCCC " style= "TABLE-LAYOUT:fixed ">
<TR bgcolor= "#FFFFFF ">
<TD align=center width= "70% " height=40 bgcolor= "#CCCCCC " > College </TD>
<TD align=center height=40 colspan=2 bgcolor= "#CCCCCC " > Administrate </TD>
</TR>
<logic:iterate id= "element " name= "listInformation " property= "collegeList ">
<TR bgcolor= "#FFFFFF ">
<TD align=center height= "40 " width= "70% ">
<!--bean:write name= "element "/-->
<bean:write name= 'element '/>
</TD>
<TD width= "15% ">
<html:link action= "/http2?method=delete&college= ' <bean:write name= "element "/> ' "> delete </html:link>
<TD width= "15% "> <html:link action= "/http2?method=modify "> modify </html:link> </TD>
</TR>
</logic:iterate>
</TABLE>
</TD>
</TR>
</TABLE>
问题一: <html:link action= "/http2?method=delete&college= ' <bean:write name= "element "/> ' "> delete </html:link> 要用 <bean:write name= "element "/> 作为参数,但按上面这样写时页面提示错误,请问有没有能正确的途径让college的值为bean的属性值,
struts-config.xml配置文件如下
<?xml version= "1.0 " encoding= "UTF-8 "?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN " "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd ">
<struts-config>
<data-sources />
<form-beans >
<form-bean name= "http2Form " type= "com.yourcompany.struts.form.Http2Form " />
</form-beans>
<global-exceptions />
<global-forwards >
<forward name= "add " path= "/form/add.jsp " />
<forward name= "delete " path= "/form/delete.jsp " />
<forward name= "modify " path= "/form/modify.jsp " />
</global-forwards>
<action-mappings >
<action
attribute= "http2Form "
input= "/form/http2.jsp "
name= "http2Form "
path= "/http2 "
parameter= "method "
scope= "request "
type= "com.yourcompany.struts.action.Http2Action " />
</action-mappings>
<message-resources parameter= "com.yourcompany.struts.ApplicationResources " />
</struts-config>
问题二:将上面的 <html:link 改写为 <a href= "/http2?method=delete&college= <bean write name= "element "/> "> delete </a>
提交后不执行DispatchAction的delete方法,而连接到其他页面了,
请问是什么原因啊？
//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_3.8.3/xslt/JavaClass.xsl
package com.yourcompany.struts.action;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.actions.DispatchAction;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.yourcompany.struts.form.Http2Form;
/**
* MyEclipse Struts
* Creation date: 01-02-2007
*
* XDoclet definition:
* @struts:action path= "/http2 " name= "http2Form " input= "/form/http2.jsp " scope= "request " validate= "true "
*/
public class Http2Action extends DispatchAction {
// --------------------- Instance Variables
// --------------------- Methods
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward add(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
System.out.println( "in method add ");
Http2Form httpForm = (Http2Form) form;
String str= " ";
if(httpForm.getCollege()!=null){
try{
BufferedReader in=new BufferedReader(new FileReader( "e:/temp/DataFactory.txt "));
int counter=0;
String strLine;
while((strLine=in.readLine())!=null){
str+=strLine+ "\r\n ";
counter++;
}
if(counter==0)
counter=1;
String strFirst= counter+ " : "+httpForm.getName()+ " -- "+httpForm.getCollege()+ "\r\n ";
FileOutputStream out=new FileOutputStream( "e:/temp/DataFactory.txt ");
String newStr=strFirst+str;
out.write(newStr.getBytes());
out.flush();
out.close();
}catch(FileNotFoundException e){
e.printStackTrace();
}catch(IOException e1){
e1.printStackTrace();
}
}
//if(httpForm.getName()!=null)
//return (mapping.findForward( "list "));
return (mapping.findForward( "add "));
}
public ActionForward delete(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
System.out.println( "in the method delete from <html:linkddddd ");
Http2Form httpForm = (Http2Form) form;
//request.setAttribute( "form ",httpForm);
System.out.println(httpForm.getCollege()+ "college ");
return (mapping.findForward( "remove "));
}
}
[解决办法]
第一个问题已经解决
: <html:link action= "/http2?method=delete&college= ' <bean:write name= "element "/> ' "> delete </html:link> 改写成如下
<html:link action= "/http2?method=delete " paramId= "element " paramName= "element "/>
第二个问题可能与我的系统有关系,希望大家参与讨论!