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Struts2的基本使用

2013-12-12 22:48 162 查看

1. Struts2的下载

    官方下载地址：http://struts.apache.org/download.cgi

    Struts2完整版结构如下：apps（应用示例），docs（帮助文档，API），lib（核心类库），src（全部源码）

2. 导入struts2核心类库到项目

    基本包包括：antlr-2.7.2.jar，commons-fileupload-1.3.jar，commons-io-2.0.1.jar，commons-logging-1.1.3.jar，commons-lang3-3.1.jar，freemarker-2.3.19.jar，javassist-3.11.0.GA.jar，ognl-3.0.6.jar，struts2-core-2.3.15.3.jar，

xwork-core-2.3.15.3.jar，如需使用Struts2的更多特性，则需导入其它jar包

3. 在web.xml中配置Struts2的核心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>

4. 创建登陆页面login.jsp，测试Struts2

<script type="text/javascript">

   function regist(){

       //获取页面的第一个表单

       targetForm = document.forms[0];

       //动态修改表单的action属性

       targetForm.action = "regist";

   }

</script>

<body bgcolor="pink">

   <center>

       用户登陆<br><hr>

       <form action="login">

           账号：<input type="text" name="username"><br>

           密码：<input type="text" name="password"><br>

           <input type="submit" value="登陆">

           <input type="submit" value="注册" onclick="regist();">

       </form>

   </center>

</body>

5. 为Struts2添加配置文件struts.xml

<?xml version="1.0" encoding="GBK"?>

<!DOCTYPE struts PUBLIC

   "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"

   "http://struts.apache.org/dtds/struts-2.1.7.dtd">



<struts>

   

   <constant name="struts.custom.i18n.resources" value="mess"/>

   

   <constant name="struts.i18n.encoding" value="GBK"/>

   

   <package name="userManager" extends="struts-default">

       

       <action name="login" class="test.action.LoginAction">

           

           <result name="input">/login.jsp</result>

           <result name="error">/error.jsp</result>

           <result name="success">/welcome.jsp</result>

       </action>

       

       <action name="regist" class="test.action.LoginAction" method="regist">

           <result name="success">/welcome.jsp</result>

       </action>

   </package>

   

   <include file="struts-xxx.xml"></include>

</struts>
6. 编写Action处理类BaseAction.java，LoginAction.java

/////////////////// 1.BaseAction

package test.action;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class BaseAction extends ActionSupport {



   private transient HttpServletRequest request = null;

   private transient HttpServletResponse response = null;

   private transient ServletContext servletContext = null;

   private transient HttpSession session = null;



   public void setRequest(HttpServletRequest request) {

       this.request = request;

   }

   public void setResponse(HttpServletResponse response) {

       this.response = response;

   }

   public void setServletContext(ServletContext servletContext) {

       this.servletContext = servletContext;

   }

   public void setSession(HttpSession session) {

       this.session = session;

   }

   public HttpServletRequest getRequest(){

       if(request != null){

           return request;

       }

       return ServletActionContext.getRequest();

   }

   public HttpServletResponse getResponse(){

       if(response != null){

           return response;

       }

       return ServletActionContext.getResponse();

   }

   public ServletContext getServletContext(){

       if(servletContext != null){

           return servletContext;

       }

       return ServletActionContext.getServletContext();

   }

   public HttpSession getSession(){

       if(session != null){

           return session;

       }

       return getRequest().getSession();

   }

}
///////////////// 2. LoginAction

package test.action;

public class LoginAction extends BaseAction{

   //定义封装请求参数的username和password属性

   private String username;

   private String password;



   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;

   }

   //注册Action

   public String regist() throws Exception {

       System.out.println(this.getRequest().getAttribute("username"));

       this.getRequest().setAttribute("username", "regist");

       return SUCCESS;

   }

   //默认的登陆Action

   public String execute() throws Exception {

       // 1. 通过request对象得到表单的值

       System.out.println(this.getRequest().getParameter("username"));

       // 2. 直接通过getter和setter得到表单的值

       if (getUsername().equals("a")&& getPassword().equals("a")){

           // 3. 设置、得到session的值

           this.getSession().setAttribute("username", "ok");

           System.out.println(this.getSession().getAttribute("username"));

           // 4. 设置响应的字符串

           this.getResponse().setCharacterEncoding("UTF-8");

           this.getResponse().getWriter().print("ccccc");

           return SUCCESS;

       } else {

           return ERROR;

       }

   }

}

7. 其它跳转页面welcome.jsp

<body>

      登陆成功！<%=request.getAttribute("username")%><br>

      <a href="login.jsp">退出</a><hr>

</body>

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标签： Struts2的基本使用

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