本想跳过直接学Struts 2的，想想，还是先学Struts 1，万一到时去那个公司，人家用的是1，那还是要学，以及了解下1与2的区别在哪里。
上例子，很简单的一个网上login例子，再思考下Struts想干嘛。
Struts下载：
http://struts.apache.org/download.cgi#struts23161
先建三个jsp文件：
1）login.jsp
<?xml version="1.0" encoding="ISO-8859-1" ?> <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /> <title>Insert title here</title> </head> <body> <form action="login.do" method="post"> Username:<input type="text" id="username" name="username" /><br/> Password:<input type="password" id="password" name="password"/><br/> <input type="submit" value="Login" /> </form> </body> </html>
2）main.jsp
<?xml version="1.0" encoding="ISO-8859-1" ?> <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /> <title>Insert title here</title> </head> <body> Welcome:${ username } </body> </html>
3）error.jsp
<?xml version="1.0" encoding="ISO-8859-1" ?> <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /> <title>Insert title here</title> </head> <body> Error </body> </html>
新建一个bean：UserForm，这个bean是Form Bean，对应的是login.jsp里头form中的控件name：
package com.my.forms; import org.apache.struts.action.ActionForm; public class UserForm extends ActionForm { public UserForm() {} 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; }
新建 一个Action:LoginAction，这个action需要重写execute(...)方法，其中，参数form为bean form（Struts自动匹配）
package com.my.actions; import javax.servlet.http.*; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import com.my.forms.*; public class LoginAction extends Action { public LoginAction() { } @Override public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { // 将Form强转为UserForm UserForm userForm = (UserForm) form; String username = userForm.getUsername(); String password = userForm.getPassword(); // 将用户名存入request表单域中 request.setAttribute("username", username); if ("123".equals(password)) return mapping.findForward("main"); else return mapping.findForward("error"); } }
在/WEB-INF中新建一个xml文件：struts-config.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-Apache Software Foundation//DTD struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"> <struts-config> <form-beans> <form-bean name="userForm" type="com.my.forms.UserForm"></form-bean> </form-beans> <action-mappings> <action path="/login" name="userForm" scope="request" type="com.my.actions.LoginAction"> <forward name="main" path="/main.jsp"></forward> <forward name="error" path="/error.jsp"></forward> </action> </action-mappings> </struts-config>
在web.xml中加入servlet的配置：
<servlet> <servlet-name>action</servlet-name> <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> <init-param> <param-name>config</param-name> <param-value>/WEB-INF/struts-config.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping>
完成。