struts

来源：互联网发布：网络安全法专家解读编辑：程序博客网时间：2024/06/01 08:33

web-inf / jsp页面执行 ---web.xml过滤器 ---->struts.xml指定由哪个java类来处理 -->src/java处理->默认执行execute()方法并反回SUCCESS，该方法可以重载用来分配由哪一页面显示结果

值由jsp的value值跟java文件中的get...作对应如sum 对应getSum()复到计算后的值

sum.jsp 第一页

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ taglib prefix="s" uri="/struts-tags" %><html><s:form action="/mystruts/sum.action">操作数1<s:textfield name="operand1"/>操作数<s:textfield name="operand2"/><s:submit value="代数和"/></s:form></html>

negative.jsp 返回结果页1

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ taglib prefix="s" uri="/struts-tags" %><html><s:property value="sum"/><h1>negative.jsp</h1></html>

positive.jsp 返回结果页2

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ taglib prefix="s" uri="/struts-tags" %><html><s:property value="sum"/><h1>positive.jsp</h1></html>

struts.xml 配置项

<package name="struts2" namespace="/mystruts" extends="struts-default"><action name="sum" class="action.FirstAction"><result name="negative">/negative.jsp</result><result>/positive.jsp</result></action></package>

FirstAction.java

package action;import com.opensymphony.xwork2.ActionSupport;public class FirstAction extends ActionSupport {/** * */private static final long serialVersionUID = 1L;private int operand1;private int operand2;public void setOperand1(int operand1) {this.operand1 = operand1;}public int getOperand1() {return operand1;}public void setOperand2(int operand2) {this.operand2 = operand2;}public int getOperand2() {return operand2;}public String execute() throws Exception{if(getSum()>=0){return SUCCESS;}else{return "negative";}}public int getSum(){return operand1+operand2;}}