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Struts2 无法访问直接通过URL访问jsp文件

2016-06-15 11:37 741 查看

Struts2 无法访问直接通过URL访问jsp文件

struts2配置文件如下:
<?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 name="main" extends="struts-default">
<action name="loginPerson"
class="com.escape.action.LoginAction">
<result name="success">/jsp/welcome.jsp</result>
<result name="login">/jsp/login.jsp</result>
</action>
</package>
</struts>
action类如下:
package com.escape.action;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport {

private String username;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
private String password;

//编写主方法
public String execute(){
if("tangbo".equals(username) && "123456".equals(password)){
return SUCCESS;		//这里直接当成string类型
}
return LOGIN;
}
}
web.xml如下:
<?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" id="WebApp_ID" version="3.0">
<display-name>Struts2MVCTest</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>*.action</url-pattern>
</filter-mapping>
</web-app>
login.jsp文件如下:
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<%@ taglib uri="/struts-tags" prefix="s" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'login.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->

</head>

<body>

<s:form action="loginPerson">
<s:label value="login system"></s:label> <br/>
<s:textfield name="username" label="username"></s:textfield>
<s:textfield name="password" label="password"></s:textfield>
<s:submit value="login"></s:submit>
</s:form>
</body>
</html>
web project的文件目录如下:



浏览器访问jsp文件下的login.jsp发现错误如下:



只有通过http://localhost:8080/Struts2MVCTest/loginPerson.action才能正确访问。
查找原因:直接在jsp文件夹下新建一个jsp通过URL可以直接访问。网上搜索原因,部分人说是因为在jsp中加入了struts2标签库。查看了书的源例程之后看到struts配置如下:



要将login设置成全局result。发现还是不可以,最后再找原因原来是web.xml配置URLpattern时没有配置jsp文件夹,添加如下:
<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>*.action</url-pattern>
<url-pattern>/jsp/*</url-pattern>
</filter-mapping>
然后可以直接通过URL:http://localhost:8080/Struts2MVCTest/jsp/login.jsp直接访问。
排除方法:1.排除web.xml配置问题 2.排除struts2配置问题
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