Struts2学习计划(二)——使用struts机制还原
准备工作

首先,将jar包直接放在lib目录下,并且在web.xml设置struts2配置
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<!-- 配置 Struts2 的 Filter -->
<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>

前段代码
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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">
<title>Insert title here</title>
</head>
<body>
<a href="testStruts2/product-input.action">Product Input</a>
</body>
</html>
details.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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">
<title>Insert title here</title>
</head>
<body>
ProductId : ${productId }
<br><br>
ProductName : ${productName }
<br><br>
ProductDesc : ${productDesc }
<br><br>
ProductPrice : ${productPrice }
<br><br>
</body>
</html>
input.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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">
<title>Insert title here</title>
</head>
<body>
<form action="product-save.action" method="post">
ProductName:<input type="text" name="productName">
<br><br>
ProductDesc:<input type="text" name="productDesc">
<br><br>
ProductPrice:<input type="text" name="productPrice">
<br><br>
<input type="submit" value="submit">
</form>
</body>
</html>
实体类
package com.struts.environment;
public class Product {
private Integer productId;
private String productName;
private String productDesc;
private double productPrice;
public Integer getProductId() {
return productId;
}
public void setProductId(Integer productId) {
this.productId = productId;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public String getProductDesc() {
return productDesc;
}
public void setProductDesc(String productDesc) {
this.productDesc = productDesc;
}
public double getProductPrice() {
return productPrice;
}
public void setProductPrice(double productPrice) {
this.productPrice = productPrice;
}
@Override
public String toString() {
return "Product [productId=" + productId + ", productName=" + productName + ", produceDesc=" + productDesc
+ ", productPrice=" + productPrice + "]";
}
public String save() {
System.out.println("Save :" + this);
return "details";
}
}
struts配置
<?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>
<!-- package包,struts2使用package来组织模块, name属性,必须,用于其他包应用当前包 extends:当前包继承那个包,可继承其中所有的配置,通常情况下继承struts-default
extends 和 interface 又有着什么样子的不同 -->
<package name="helloWorld" extends="struts-default" namespace="/testStruts2">
<!-- 配置一个action,一个struts2的请求就是一个action name:对应一个struts2的请求名字(或对一个servletPath
但去除/和扩展名),不包括扩展名 result:结果 默认的结果是success -->
<action name="product-input">
<result name="huhu">/WEB-INF/pages/koko.jsp</result>
<result>/WEB-INF/pages/input.jsp</result>
</action>
<!-- 默认的class为ActionSupport类 -->
<action name="product-save" class="com.struts.environment.Product"
method="save">
<result name="details">/WEB-INF/pages/details.jsp</result>
<result name="input">/WEB-INF/pages/strttt.jsp</result>
</action>
<action name="product_*" class="com.struts.environment.Product"
method="{1}">
<result name="ref">/WEB-INF/pages/koko.jsp</result>
</action>
</package>
</struts>
node.txt
1.VS 自实现:
1)搭建Struts2的开发环境
2)不需要显示的定义filter,而是用的是struts2的配置文件
3)details.jsp比以前更简单
4)${requestScope.product.productName} -> ${productName}
4) 步骤:
1.点击action进入strtus.xml文件中,然后进入相应的class寻找相应的方法
2.获得相应的方法返回值之后,返回相应的jsp页面或者是其他路径

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