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struts2中一个表单中提交多个请求的例子(多个提交按钮)

2024-09-05 00:22:06
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在很多Web应用中,为了完成不同的工作,一个HTML form标签中可能有两个或多个submit按钮,Struts2中提供了另外一种方法,使得无需要配置可以在同一个action类中执行不同的方法(默认执行的是execute方法)

使用这种方式也需要通过请求参来来指定要执行的动作。请求参数名的格式为
  action!method.action
  注:由于Struts2只需要参数名,因此,参数值是什么都可以。

下面我就给出一个实例程序来演示如何处理有多个submit的form:

主页面more_submit.jsp

复制代码 代码如下:


<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>   
<title>My JSP 'hello.jsp' starting page</title>
</head>
<body>
    <s:form action="submit.action">
        <s:textfield label="输入内容" />
        <s:submit value="保存" method="save" />
        <s:submit value="打印" method="print" />
    </s:form>
</body>
</html>

MoreSubmitAction.java

复制代码 代码如下:


package action;

import javax.servlet.http.*;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.interceptor.*;

public class MoreSubmitAction extends ActionSupport implements
        ServletRequestAware {
    private String msg;
    private javax.servlet.http.HttpServletRequest request;

    // 获得HttpServletRequest对象
    public void setServletRequest(HttpServletRequest request) {
        this.request = request;
    }

    // 处理save submit按钮的动作
    public String save() throws Exception {
        request.setAttribute("result", "成功保存[" + msg + "]");
        return "save";
    }

    // 处理print submit按钮的动作
    public String print() throws Exception {
        request.setAttribute("result", "成功打印[" + msg + "]");
        return "print";
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

structs.xml

复制代码 代码如下:


<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>

    <package extends="struts-default">
        <action>
            <result>
                /result.jsp
            </result>
            <result>
                /result.jsp
            </result>
        </action>
    </package>

 
</struts>

result.jsp

复制代码 代码如下:


<%@ page language="java" contentType="text/html; charset=GBK"
    pageEncoding="GBK"%>
<!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=ISO-8859-1">
<title>提交结果</title>
</head>
<body>
<h1>${result }</h1>
</body>
</html>

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