struts登录系统兑现
struts登录系统实现
在java ee中讲了第一个web实例,具体见博文:http://hnzhoujunmei.iteye.com/admin/blogs/1004827
非常简单的一个实例,没有数据库连接,本实例在这个实例基础上添加struts功能和数据库功能
在上一个实例基础上用myeclipse的添加struts功能,即生成了一个struts的资源文件,
ApplicationResources.properties:
项目的目录结构:
![struts登录系统兑现 struts登录系统兑现](/default/index/img?u=aHR0cDovL3d3dy5teWV4Y2VwdGlvbnMubmV0L2ltZy8yMDEyLzExLzA2LzE1MjgyODIxMDguanBn)
注意该文件不能写入中文。可以使用java中的native2ascii.exe将中文转换为字符串。
然后新建Action,Form等,并可在可视化环境下进行配置,如form的属性等
Action类:
业务逻辑类:
表单类:
struts配置文件:
web.xml:
在java ee中讲了第一个web实例,具体见博文:http://hnzhoujunmei.iteye.com/admin/blogs/1004827
非常简单的一个实例,没有数据库连接,本实例在这个实例基础上添加struts功能和数据库功能
在上一个实例基础上用myeclipse的添加struts功能,即生成了一个struts的资源文件,
ApplicationResources.properties:
# Resources for parameter 'com.qdu.struts.ApplicationResources' # Project strustLoginDemo #message file login.username=username is null! login.password=password is null!
项目的目录结构:
注意该文件不能写入中文。可以使用java中的native2ascii.exe将中文转换为字符串。
然后新建Action,Form等,并可在可视化环境下进行配置,如form的属性等
Action类:
/* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package com.qdu.struts.action; 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; import com.qdu.struts.BO.LoginBO; import com.qdu.struts.form.LoginForm; /** * MyEclipse Struts * Creation date: 04-14-2011 * * XDoclet definition: * @struts.action path="/login" name="loginForm" input="/login.jsp" scope="request" validate="true" * @struts.action-forward name="failed" path="/fail.jsp" * @struts.action-forward name="success" path="/success.jsp" */ public class LoginAction extends Action { /* * Generated Methods */ /** * Method execute * @param mapping * @param form * @param request * @param response * @return ActionForward */ public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub // 调用业务处理类 LoginBO login = new LoginBO(); if(login.validate(loginForm.getUsername(),loginForm.getPassword())){ request.setAttribute("username", loginForm.getUsername()); return mapping.findForward("success"); } else return mapping.findForward("failed"); } }
业务逻辑类:
package com.qdu.struts.BO; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class LoginBO { public boolean validate(String username, String password) { Connection conn = null; try { Class.forName("org.gjt.mm.mysql.Driver"); String url = "jdbc:mysql://localhost:3306/junit"; conn = DriverManager.getConnection(url,"root","root"); Statement stmt = conn.createStatement(); String sql = "select * from usertable where name='"+username+"' and password = '"+password+"'"; ResultSet rs = stmt.executeQuery(sql); if(rs.next()){return true;} else return false; } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } return false; } }
表单类:
/* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package com.qdu.struts.form; import javax.servlet.http.HttpServletRequest; import org.apache.struts.action.ActionErrors; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionMessage; /** * MyEclipse Struts Creation date: 04-14-2011 * * XDoclet definition: * * @struts.form name="loginForm" */ public class LoginForm extends ActionForm { /* * Generated fields */ /** password property */ private String password; /** username property */ private String username; /* * Generated Methods */ /** * Method validate * * @param mapping * @param request * @return ActionErrors */ public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {//验证,相当于JavaScript的验证 ActionErrors errors = new ActionErrors(); if (this.username == null || this.username.length() < 1) errors.add("username", new ActionMessage("login.username")); if (this.password == null || this.username.length() < 1) errors.add("password", new ActionMessage("login.password")); return errors; } /** * Method reset * * @param mapping * @param request */ public void reset(ActionMapping mapping, HttpServletRequest request) { // TODO Auto-generated method stub this.username = null; this.password = null; } /** * Returns the password. * * @return String */ public String getPassword() { return password; } /** * Set the password. * * @param password * The password to set */ public void setPassword(String password) { this.password = password; } /** * Returns the username. * * @return String */ public String getUsername() { return username; } /** * Set the username. * * @param username * The username to set */ public void setUsername(String username) { this.username = username; } }
struts配置文件:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"> <struts-config> <data-sources /> <form-beans > <form-bean name="loginForm" type="com.qdu.struts.form.LoginForm" /> </form-beans> <global-exceptions /> <global-forwards /> <action-mappings > <action attribute="loginForm" input="/login.jsp" name="loginForm" path="/login" scope="request" type="com.qdu.struts.action.LoginAction"> <forward name="failed" path="/fail.jsp" /> <forward name="success" path="/success.jsp" /> </action> </action-mappings> <message-resources parameter="com.qdu.struts.ApplicationResources" /> </struts-config>
web.xml:
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <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>3</param-value> </init-param> <init-param> <param-name>detail</param-name> <param-value>3</param-value> </init-param> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <filter> <filter-name> FormFilter</filter-name> <filter-class>com.qdu.struts.BO.FormFilter</filter-class> </filter> <filter-mapping> <filter-name>FormFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>