[英]Struts2 : Action's property setter is not invoked
我嘗試發布一個簡單的表格:
<s:form action="register">
<s:textfield name="lastname"></s:textfield>
<s:submit></s:submit>
</s:form>
那個行動 :
public class RegisterAction extends ActionSupport {
private String lastname;
public String execute() {
System.out.println("register");
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
}
該操作將輸出寄存器字符串,但不會調用設置器。
為什么永不叫二傳手? 即使當我在瀏覽器http://localhost:8686/register.action?lastname=sdjh
直接鍵入操作時,設置程序也不會被調用,但是execute
方法會輸出“ register”。
在您的代碼中沒有看到任何遺漏的部分。 我試圖復制相同的東西,但發現它運行良好。 以下是我的代碼。
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
在struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />
<package name="default" namespace="/" extends="struts-default">
<action name="register" class="com.tmp.RegisterAction">
<result>one.jsp</result>
</action>
</package>
</struts>
的index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!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=UTF-8">
</head>
<body>
<s:form action="register">
<s:textfield name="lastname"></s:textfield>
<s:submit></s:submit>
</s:form>
</body>
</html>
RegisterAction
package com.tmp;
import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionSupport;
public class RegisterAction extends ActionSupport {
private static final long serialVersionUID = 1L;
String lastname;
public String getLastname() {
return lastname;
}
public void setLastname( String lastname ) {
this.lastname = lastname;
}
@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
return Action.SUCCESS;
}
}
一個.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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=UTF-8">
</head>
<body>
<s:property value="lastname"/>
</body>
</html>
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