現(xiàn)在開始加入公司的核心項目，但由于項目開發(fā)比較早，所以使用的技術不是很新潮，前臺用的還是struts1。
雖然不是什么新技術，但仍可以從中學到好多東西的。花了一個晚上的時間終于把struts1的流程跑通了。
省略了創(chuàng)建過程及加入jar包的過程，直接進入正題。
首頁要在web.xml中添加相應的struts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>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>2</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
然后在config所對應的目錄下添加struts配置文件struts-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">
<struts-config>
<!-- ActionForm -->
<form-beans>
<!-- name:名稱 type:類路徑 -->
<form-bean name="loginForm" type="com.login.LoginForm">
</form-bean>
</form-beans>
<!-- 設置全局URL，必須寫在Action前面，這樣任何Action都可以使用 -->
<global-forwards>
<forward name="result" path="/result.jsp" />
</global-forwards>
<!-- 注冊Action -->
<action-mappings>
<!-- name：名稱 type：類路徑 path：客戶端（JSP）提交到服務器端時指定的路徑（Form表單中的action=”/login.do" -->
<action path="/login" type="com.login.LoginAction"
name="loginForm" scope="request">
<!-- 局部URL，只有這個action可以使用 -->
<forward name="success" path="/success.jsp"></forward>
<forward name="error" path="/error.jsp"></forward>
</action>
</action-mappings>
</struts-config>
注：Action和Form的關系是一個Action只能對應一個Form（通過Action的name屬性）
而一個Form可以被多個Action調(diào)用
LoginAction.java
package com.login;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class LoginAction extends Action {
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
LoginForm lf = (LoginForm) form;
String username = lf.getUsername();
String password = lf.getPassword();
String errorInfo = "";
String result = UserManager.getInstance().login(username, password);
if (result.equals("success")) {
request.setAttribute("username", username);
return mapping.findForward("success");
} else if (result.equals("username")) {
errorInfo = "密碼錯誤";
} else {
errorInfo = "用戶名錯誤";
}
request.setAttribute("errorInfo", errorInfo);
return mapping.findForward("error");
}
}
LoginForm.java
package com.login;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
public class LoginForm extends ActionForm {
private String username;
private String password;
public void reset(ActionMapping mapping, HttpServletRequest request) {
System.out.println("--------reset()-------------");
super.reset(mapping, request);
}
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
System.out.println("--------validate()-------------");
return super.validate(mapping, request);
}
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;
}
}
對我個人來說最重要的是前臺jsp頁面沒有掌握，經(jīng)常在頁面上花費很多時間
在編寫JSP頁面時要用struts標簽，而我經(jīng)常會忘記
引入jsp標簽
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>首頁</title>
</head>
<body>
<html:form action="/login.do">
用戶名：<html:text property="username"></html:text><br/>
密碼: <html:password property="password"></html:password><br/>
<html:submit>submit</html:submit>
</html:form>
</body>
</html>
展示結(jié)果（將Action的返回值展示到JSP頁面上）
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Error</title>
</head>
<body>
<bean:write name="errorInfo" scope="request" />
</body>
</html>