Struts2的Action访问
分类:
IT文章
•
2025-02-07 10:11:37
● 示例项目结构

● demo1.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
<h1>Action的访问</h1>
<h3>通过method方法</h3>
<a href="${pageContext.request.contextPath}/userFind.action">查询用户</a>
<a href="${pageContext.request.contextPath}/userUpdate.action">修改用户</a>
<a href="${pageContext.request.contextPath}/userDelete.action">删除用户</a>
<a href="${pageContext.request.contextPath}/userSave.action">保存用户</a><br/>
<h3>通过通配符的方法</h3>
<a href="${pageContext.request.contextPath}/product_find.action">查询商品</a>
<a href="${pageContext.request.contextPath}/product_update.action">修改商品</a>
<a href="${pageContext.request.contextPath}/product_delete.action">删除商品</a>
<a href="${pageContext.request.contextPath}/product_sava.action">保存商品</a><br/>
<h3>通过动态方法访问</h3>
<a href="${pageContext.request.contextPath}/customer!find.action">查询客户</a>
<a href="${pageContext.request.contextPath}/customer!update.action">修改客户</a>
<a href="${pageContext.request.contextPath}/customer!delete.action">删除客户</a>
<a href="${pageContext.request.contextPath}/customer!sava.action">保存客户</a><br/>
</body>
</html>
dmeo1.jsp
● struts2.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>
<include file="com/sve/Struts2/demo2/struts_demo2.xml"/>
</struts>
struts2.xml
● 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">
<display-name>Struts2</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<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>
web.xml
● struts2_demo2.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>
<!-- 允许动态方法 -->
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<package name="default" namespace="/" extends="struts-default">
<!-- 通过method方法 -->
<action name="userFind" class="com.sve.Struts2.demo2.UserAction" method="find"></action>
<action name="userUpdate" class="com.sve.Struts2.demo2.UserAction" method="update"></action>
<action name="userDelete" class="com.sve.Struts2.demo2.UserAction" method="delete"></action>
<action name="userSave" class="com.sve.Struts2.demo2.UserAction" method="save"></action>
<!-- 通配符的方法 -->
<action name="*_*" class="com.sve.Struts2.demo2.ProductAction" method="{2}"></action>
<!-- 动态方法访问 -->
<action name="customer" class="com.sve.Struts2.demo2.CustomerAction"></action>
</package>
</struts>
struts2_demo2.xml
● UserAction.java
package com.sve.Struts2.demo2;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport{
public String find() {
System.out.println("查询用户。。。");
return NONE;
}
public String update() {
System.out.println("修改用户。。。");
return NONE;
}
public String delete() {
System.out.println("删除用户。。。");
return NONE;
}
public String save() {
System.out.println("保存用户。。。");
return NONE;
}
}
UserAction.java
● CustomerAction.java
package com.sve.Struts2.demo2;
import com.opensymphony.xwork2.ActionSupport;
public class CustomerAction extends ActionSupport {
public String find() {
System.out.println("查询客户。。。");
return NONE;
}
public String update() {
System.out.println("修改客户。。。");
return NONE;
}
public String delete() {
System.out.println("删除客户。。。");
return NONE;
}
public String sava() {
System.out.println("保存客户。。。");
return NONE;
}
}
CUstomerAction.java
● ProductAction.java
package com.sve.Struts2.demo2;
import com.opensymphony.xwork2.ActionSupport;
public class ProductAction extends ActionSupport {
public String find() {
System.out.println("查询商品。。。");
return NONE;
}
public String update() {
System.out.println("修改商品。。。");
return NONE;
}
public String delete() {
System.out.println("删除商品。。。");
return NONE;
}
public String sava() {
System.out.println("保存商品。。。");
return NONE;
}
}
ProductAction.java
1.method方法
<action name="userFind" class="com.sve.Struts2.demo2.UserAction" method="find"></action>
在struts2_demo2.xml中,通过设置action中的method的值,值为class对应的方法名
2.通配符的方法(常用的)
<action name="*_*" class="com.sve.Struts2.demo2.ProductAction" method="{2}"></action>
与method方法略微不同,method的值设置为name值对应星编号,以上也可设置为
<action name="product_*" class="com.sve.Struts2.demo2.ProductAction" method="{1}"></action>
3.动态方法
使用动态方法前必须先设置constant,允许动态方法的使用
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
无须设置method,动态方法是修改访问链接,如示例中的
<action name="customer" class="com.sve.Struts2.demo2.CustomerAction"></action>
<a href="${pageContext.request.contextPath}/customer!find.action">查询客户</a>
customer为action中设置的name值,然后加入“!”,后加上想使用的方法名