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怎样使用标签和strust区别在一个form中的2个按钮的行为

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怎样使用标签和strust区别在一个form中的2个按钮的行为[已结贴,结贴人:hanpeng111]

发表于：2007-09-22 21:11:21 楼主

前台代码：
<html:form action= "/testaction.do " method= "post ">
.........
<html:submit property= "action " value= "增加 ">
<bean:message key= "button.add "/> </html:submit>
<div align= "center "> </div> </td>
<td height= "25 "> <div align= "center ">
<html:submit property= "action " value= "修改 ">
<bean:message key= "button.updata "/> </html:submit>
</div> </td>

testaction的代码：

package ems.struts;

import java.util.hashmap;
import java.util.map;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import org.apache.struts.action.actionform;
import org.apache.struts.action.actionforward;
import org.apache.struts.action.actionmapping;
import org.apache.struts.actions.lookupdispatchaction;

public class testaction extends lookupdispatchaction {
protected map getkeymethodmap（)
{
hashmap map=new hashmap（);
map.put（ "button.add ", "add ");//button.delete,按钮的 message key
map.put（ "button.update ", "update ");
return map;

}
public actionforward add（actionmapping mapping,
actionform form,
httpservletrequest request,
httpservletresponse response)
{
system.out.println（ "add ");
return null;
}
public actionforward update（actionmapping mapping,
actionform form,
httpservletrequest request,
httpservletresponse response)
{
system.out.println（ "updata ");
return null;
}

}
配置文件 :::的代码：
<action parameter= "action " path= "/testaction " type= "ems.struts.testaction ">
<forward name= "plan_eng_reg " path= "/basic_data/plan_eng_reg.jsp " />

在资源文件applicationresources.properties中
button.add=add
button.updata=updata

在运行时出现如下错误！

javax.servlet.jsp.jspexception: cannot retrieve definition for form bean null on action /testaction.do
at org.apache.struts.taglib.html.formtag.lookup（formtag.java:731)
at org.apache.struts.taglib.html.formtag.dostarttag（formtag.java:419)
at jsp_servlet._basic_data.__plan_eng_reg._jspservice（__plan_eng_reg.java:305)
at weblogic.servlet.jsp.jspbase.service（jspbase.java:33)
at weblogic.servlet.internal.servletstubimpl$servletinvocationaction.run（servletstubimpl.java:1072)
at weblogic.servlet.internal.servletstubimpl.invokeservlet（servletstubimpl.java:465)
at weblogic.servlet.internal.servletstubimpl.invokeservlet（servletstubimpl.java:348)
at weblogic.servlet.internal.webappservletcontext$servletinvocationaction.run（webappservletcontext.java:6981)
at weblogic.security.acl.internal.authenticatedsubject.doas（authenticatedsubject.java:321)
at weblogic.security.service.securitymanager.runas（securitymanager.java:121)
at weblogic.servlet.internal.webappservletcontext.invokeservlet（webappservletcontext.java:3892)
at weblogic.servlet.internal.servletrequestimpl.ＥＸＥＣute（servletrequestimpl.java:2766)
at weblogic.kernel.ＥＸＥＣutethread.ＥＸＥＣute（ＥＸＥＣutethread.java:224)
at weblogic.kernel.ＥＸＥＣutethread.run（ＥＸＥＣutethread.java:183)

发表于：2007-09-23 02:30:491楼得分:0

button.updata=updata->

button.update=update?

发表于：2007-09-23 14:00:122楼得分:0

你在第二次提交的时候用js吧,这样修改action比较方便!

发表于：2007-09-24 08:45:093楼得分:0

发表于：2007-09-24 08:49:414楼得分:0

我的方法是在页面上放一个隐藏域，然后再在button的onclick时间中修改隐藏域的值，这样提交之后就可以通过查看隐藏域来知道要执行什么操作~

发表于：2007-09-24 08:55:385楼得分:0

为什么我在运行时出现如下错误啊！！！！！

javax.servlet.jsp.jspexception: cannot retrieve definition for form bean null on action /testaction.do
at org.apache.struts.taglib.html.formtag.lookup（formtag.java:731)
at org.apache.struts.taglib.html.formtag.dostarttag（formtag.java:419)
at jsp_servlet._basic_data.__plan_eng_reg._jspservice（__plan_eng_reg.java:305)
at weblogic.servlet.jsp.jspbase.service（jspbase.java:33)
at weblogic.servlet.internal.servletstubimpl$servletinvocationaction.run（servletstubimpl.java:1072)
at weblogic.servlet.internal.servletstubimpl.invokeservlet（servletstubimpl.java:465)
at weblogic.servlet.internal.servletstubimpl.invokeservlet（servletstubimpl.java:348)
at weblogic.servlet.internal.webappservletcontext$servletinvocationaction.run（webappservletcontext.java:6981)
at weblogic.security.acl.internal.authenticatedsubject.doas（authenticatedsubject.java:321)
at weblogic.security.service.securitymanager.runas（securitymanager.java:121)
at weblogic.servlet.internal.webappservletcontext.invokeservlet（webappservletcontext.java:3892)
at weblogic.servlet.internal.servletrequestimpl.ＥＸＥＣute（servletrequestimpl.java:2766)
at weblogic.kernel.ＥＸＥＣutethread.ＥＸＥＣute（ＥＸＥＣutethread.java:224)
at weblogic.kernel.ＥＸＥＣutethread.run（ＥＸＥＣutethread.java:183)

发表于：2007-09-24 09:24:506楼得分:20

在你的form中查看一下是否有action这个变量

发表于：2007-09-24 10:00:007楼得分:10

form 有没有定义testaction使用的form？

发表于：2007-09-24 10:11:248楼得分:50

在struts-config.xml配置文件中为action定义一个formbean啊，如
<form-bean name= "testform " type= "xxx ">
<form-property name= " " type= " "/>
</form-bean>

<action
name= "testform "
path= "/testaction "
type= "ems.struts.testaction "
parameter= "action ">
<forward name= "plan_eng_reg " path= "/basic_data/plan_eng_reg.jsp " />
</action>

发表于：2007-09-24 10:15:149楼得分:0

最好的办法是用js提交，submit之前修改action

发表于：2007-09-24 10:21:3910楼得分:0

docment.forms[0].action = "add.do ";
docment.forms[0].submit（);

发表于：2007-09-24 10:28:1311楼得分:0

你提交的信息是要和你定义的form bean里面的属性对应的，我看你的配置文件里没写出formbean的定义呢

发表于：2007-09-24 14:44:4112楼得分:0

我已经定义 <form-bean name= "testactionform " type= "ems.struts.testactionform " /> 了

还是报错
javax.servlet.jsp.jspexception: cannot retrieve definition for form bean null on action /testaction.do
at org.apache.struts.taglib.html.formtag.lookup（formtag.java:731)
at org.apache.struts.taglib.html.formtag.dostarttag（formtag.java:419)
at jsp_servlet._basic_data.__plan_eng_reg._jspservice（__plan_eng_reg.java:305)
at weblogic.servlet.jsp.jspbase.service（jspbase.java:33)
at weblogic.servlet.internal.servletstubimpl$servletinvocationaction.run（servletstubimpl.java:1072)
at weblogic.servlet.internal.servletstubimpl.invokeservlet（servletstubimpl.java:465)
at weblogic.servlet.internal.servletstubimpl.invokeservlet（servletstubimpl.java:348)
at weblogic.servlet.internal.webappservletcontext$servletinvocationaction.run（webappservletcontext.java:6981)
at weblogic.security.acl.internal.authenticatedsubject.doas（authenticatedsubject.java:321)
at weblogic.security.service.securitymanager.runas（securitymanager.java:121)
at weblogic.servlet.internal.webappservletcontext.invokeservlet（webappservletcontext.java:3892)
at weblogic.servlet.internal.servletrequestimpl.ＥＸＥＣute（servletrequestimpl.java:2766)
at weblogic.kernel.ＥＸＥＣutethread.ＥＸＥＣute（ＥＸＥＣutethread.java:224)
at weblogic.kernel.ＥＸＥＣutethread.run（ＥＸＥＣutethread.java:183)

发表于：2007-09-24 15:00:0213楼得分:0

你formbean、action怎么配置的都贴出来

发表于：2007-09-24 15:16:1814楼得分:0

function doedit（){
myform.action = "****.do?action=edit ";
myform.submit（);
}
function doadd（){
myform.action = "****.do?action=add ";
myform.submit（);
}
<html:form action= "****.do ">
<html:button property= "button " onclick= "doedit（) ">
修改
</html:button>
<html:button property= "button " onclick= "doadd（) ">
增加 </html:button>
</html:form>
注意js中form名称与你的****.do对应的actionform一致

发表于：2007-09-24 15:24:4115楼得分:20

配置文件 :::的代码：
<action parameter= "action " path= "/testaction " type= "ems.struts.testaction ">
<forward name= "plan_eng_reg " path= "/basic_data/plan_eng_reg.jsp " />
改为:
<action parameter= "action " path= "/testaction " name= "testactionform " type= "ems.struts.testaction ">
<forward name= "plan_eng_reg " path= "/basic_data/plan_eng_reg.jsp " />

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