Eclipse下用maven構建Struts專案，實現簡單的登入及驗證。
點選File->new->Maven Project.
右鍵所建立的專案->點選Properties->點選Java Build Path將JDK改成所需要的版本
然後點選Project Facets先改Java，再改Dynamic Web Module。否則Dynamic Web Module不能改
最後點選Deployment Assembly對應好路徑。將src/main下的webapp檔案刪除。右鍵專案Java EE Tools 生成一個新的web.xml
在pom.xml中匯入：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.qst</groupId> <artifactId>Struts2Demo</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>Struts2Demo Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-core --> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-core</artifactId> <version>2.3.32</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.struts.xwork/xwork-core --> <dependency> <groupId>org.apache.struts.xwork</groupId> <artifactId>xwork-core</artifactId> <version>2.3.32</version> </dependency> <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging --> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.0</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>Struts2Demo</finalName> </build> </project>
右鍵專案。點選Maven然後update maven-----------------------------等待Jar包下載完成
在src/main/resources下新建struts.xml檔案
<?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> <constant name="struts.i18n.encoding" value="UTF-8"></constant> <constant name="struts.devMode" value="true"></constant> <include file="struts-product.xml"></include> <package name="user" namespace="/user" extends="struts-default"> <global-results> <result name="error">/error.jsp</result> </global-results> <global-exception-mappings> <exception-mapping result="error" exception="java.lang.Exception"></exception-mapping> </global-exception-mappings> <action name="userAction_*" method="{1}" class="com.qst.action.UserAction"> <result name="main" type="dispatcher">/main.jsp</result> <result name="login" type="dispatcher">/login.jsp</result> <result name="input">/login.jsp</result> </action> <!-- <action name="*_*" method="{2}" class="com.qst.action.{1}"> <result name="main" type="redirect">/main.jsp</result> <result name="login" type="dispatcher">/login.jsp</result> </action> --> <!-- <action name="userActionlist" method="list" class="com.qst.action.UserAction"> <result name="main" type="redirect">/main.jsp</result> <result name="login" type="dispatcher">/login.jsp</result> </action> --> </package> </struts>
在web.xml中配置：
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <display-name>Struts2Demo</display-name> <filter> <filter-name>Struts2Filter</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>Struts2Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <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> </web-app>
main.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib prefix="s" uri="/struts-tags" %> <!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> <s:debug/> 歡迎您：${sessionScope.username} <br>${applicationScope.appname } <br>${requestScope.requestarg } </body> </html>
login.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib prefix="s" uri="/struts-tags" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; pageContext.setAttribute("basePath",basePath); %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript" src="js/jquery-3.3.1.min.js"></script> <base href="${pageScope.basePath}"> <script type="text/javascript"> function validate(){ if($("#username").val()=="" || $("#userpass").val()==""){ alert("使用者名稱或密碼不能為空！"); return false; }else if($("#userpass").val().length<6 || $("#userpass").val().length>12){ alert("密碼長度範圍6-12"); return false; } return true; } </script> </head> <body> <s:debug/> <s:fielderror cssStyle="color:red"></s:fielderror> <p><font color=red>${error}${requestScope.action.fieldErrors["user.username"]}</font></p> <form action="user/userAction_login" method="post"> <p>username:<input name="user.username" id="username" type="text"/></p> <p>userpass:<input name="user.userpass" id="userpass" type="password"/></p> <p><input type="submit" value="提交"/></p> </form> </body> </html>
error.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> error! ${exception} </body> </html>
Users:
package com.qst.po;
public class Users {
private String username; private String userpass; public Users() { } public Users(String username,String userpass) { this.username=username; this.userpass=userpass; }
public String getUsername() { return username; }
public void setUsername(String username) { this.username = username; }
public String getUserpass() { return userpass; }
public void setUserpass(String userpass) { this.userpass = userpass; } } UserDao.java:
package com.qst.dao;
import com.qst.po.Users;
public interface UserDao {
public Users selectLogin(Users user); }
UserDaoImpl.java:
package com.qst.dao;
import com.qst.po.Users;
public class UserDaoImpl implements UserDao {
@Override public Users selectLogin(Users user) { String sql="select * from tb_users where username=? and userpass=?"; if("張三".equals(user.getUsername()) && "123456".equals(user.getUserpass())) return user; return null; }
} UserService.java
package com.qst.service;
import com.qst.po.Users;
public interface UserService {
public boolean login(Users user); } UserServiceImpl.java:
package com.qst.service;
import com.qst.dao.UserDao; import com.qst.dao.UserDaoImpl; import com.qst.po.Users;
public class UserServiceImpl implements UserService {
UserDao userDao = new UserDaoImpl(); @Override public boolean login(Users user) { Users u = userDao.selectLogin(user); if(u==null) return false; return true; }
}
UserAction.java:
package com.qst.action;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import com.qst.po.Users; import com.qst.service.UserService; import com.qst.service.UserServiceImpl;
public class UserAction extends ActionSupport{
Users user; String error; public String register() { return ""; } public String list() { return ""; } public String login() { UserService userService = new UserServiceImpl(); boolean login = userService.login(user); if (login) { Map<String,Object> session = ActionContext.getContext().getSession(); session.put("username", user.getUsername()); Map<String,Object> application = ActionContext.getContext().getApplication(); application.put("appname", "struts2app"); ActionContext.getContext().put("requestarg", "requestarg"); return "main"; } else { error = "密碼在六到十六位"; return "login"; } } public void validateLogin() { if("".equals(user.getUsername())) { super.addFieldError("user.username", "請輸入正確的使用者名稱"); } if(user.getUserpass().length()<6 || user.getUserpass().length()>12) { super.addFieldError("user.userpass", " 請輸入正確的密碼"); } }
@Override public void validate() { System.out.println("validate()"); }
public Users getUser() { return user; }
public void setUser(Users user) { this.user = user; }
public String getError() { return error; }
}