用struts 编写validate的登录程序[有数据库oracle]

  1 此struts的配置文件的编写
  2 struts - config.xml
  3
  4 <? xml version = " 1.0 "  encoding = " UTF-8 " ?>
  5 <! DOCTYPE struts - config PUBLIC  " -//Apache Software Foundation//DTD Struts Configuration 1.2//EN "   " http://struts.apache.org/dtds/struts-config_1_2.dtd " >
  6
  7 < struts - config >
  8   < data - sources >
  9          < data - source key = " oracleDB1 "  type = " org.apache.commons.dbcp.BasicDataSource " >
 10              < set - property property = " driverClassName "     
 11                 value = " oracle.jdbc.driver.OracleDriver "   />
 12              < set - property property = " url "
 13                 value = " jdbc:oracle:thin:@localhost:1521:你的SID "   />
 14              < set - property property = " maxActive "
 15                 value = " 5 " />
 16              < set - property property = " username "
 17                 value = " 数据库用户名 " />
 18              < set - property property = " password "
 19                 value = " 数据库密码 " />
 20              < set - property property = " autoCommit "
 21                 value = " true " />
 22          </ data - source >
 23      </ data - sources >
 24     
 25
 26    < form - beans  >
 27      < form - bean name = " userForm "  type = " classmate.UserForm "   />
 28    </ form - beans >
 29
 30    < global - exceptions  />
 31    < global - forwards  >
 32            < forward name = " failed "  path = " /error.jsp " />
 33          < forward name = " successed "  path = " /right.jsp " />
 34    </ global - forwards >
 35
 36    < action - mappings  >
 37    < action path = " /login "  type = " classmate.LoginAction "  name = " userForm "  scope = " request "  validate = " true "     input = " /error.jsp "   />
 38    < action path = " /regist "  forward = " /regist.jsp " />
 39    </ action - mappings >
 40
 41    < controller processorClass = " classmate.MyRequestProcessor "   />
 42    < message - resources parameter = " classmate.MyResource " />     
 43    </ struts - config >
 44
 45 在添加MyResource_zh.properties  / MyResource_zh.properties文件 其实标签用。我不太爱用标签 因为 有的是时候有问题 也不知道什么地方错了！
 46
 47 在用标签的时候还要在web.xml中写出标签文件struts - bean.tld /  struts - html.tld的路径。下面我会给出web.xml的代码。
 48
 49 MyResource_zh.properties
 50
 51 MyResource.properties
 52 title.login  =  登录界面
 53 title.welcome  =  欢迎，
 54 title.failure  =  抱歉，登录失败 !
 55 label.login  =  请输入用户名和密码
 56 label.deny  =  您无权访问本页面 !
 57 item.submit  =  提交
 58 item.reset  =  重置
 59 item.user  =  用户
 60 item.password  =  密码
 61 link.relative  =  友情链接
 62 link.loginAgain  =  重新登录
 63
 64 error.name.required  =  用户名不能为空
 65 error.psw.required  =  密码不能为空
 66
 67
 68 web.xml
 69 <? xml version = " 1.0 "  encoding = " ISO-8859-1 " ?>
 70
 71 <! DOCTYPE web - app
 72   PUBLIC  " -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN "
 73    " http://java.sun.com/dtd/web-app_2_3.dtd " >
 74
 75 < web - app >
 76
 77    <!--  Action Servlet Configuration  -->
 78    < servlet >
 79      < servlet - name > actionServlet </ servlet - name >
 80      < servlet - class > org.apache.struts.action.ActionServlet </ servlet - class >
 81    </ servlet >
 82
 83    <!--  Action Servlet Mapping  -->
 84    < servlet - mapping >
 85      < servlet - name > actionServlet </ servlet - name >
 86      < url - pattern >* . do </ url - pattern >
 87    </ servlet - mapping >
 88
 89    <!--  The Welcome File List  -->
 90    < welcome - file - list >
 91      < welcome - file > login.jsp </ welcome - file >
 92    </ welcome - file - list >
 93   
 94 <!--  Struts Tag Library Descriptors  -->
 95    < taglib >
 96      < taglib - uri >/ WEB - INF / struts - bean.tld </ taglib - uri >
 97      < taglib - location >/ WEB - INF / struts - bean.tld </ taglib - location >
 98    </ taglib >   
 99 </ web - app >
100
101 到这就一切都搞定了 至于 struts - config.xml 配置文件和其他 的对应关系自己在细看看就可以了。

工具：  MyEclipse Eclipse
数据库：Oracle
服务器：Tomcat

其他包：   commons-pool-1.3　
　　　　   commons-dbcp-1.2.1
　　　　   jdbc2_0-stdext.jar
　　　　　 classes12.jar

1．    首先建立数据库

Create TABLE classuser(    
    username    VARCHAR2 (20) PRIMARY KEY,
    password    VARCHAR2 (20) 
);

2.  新建立一个项目
MyEclipse
          ---J2EE PROJECT
                            ---WEB PROJECT
这里给项目起名为：validate_login

然后给项目添加：struts
                        tomcat

接着把其他包也都添加到项目中

3．    始写struts 代码
 
建立一个 Form，Action & Jsp
分别建立java文件 ：
LoginAction.java
                  UserForm.java
                  DBUser.java
Jsp文件：
Login.jsp
Right.jsp
Error.jsp

 1 LoginAction.java
 2
 3 import  org.apache.struts.action.Action;
 4 import  org.apache.struts.action.ActionForm;
 5 import  org.apache.struts.action.ActionForward;
 6 import  org.apache.struts.action.ActionMapping;
 7
 8 import  org.apache.struts.action.ActionMessages;
 9 import  org.apache.struts.action.ActionMessage;
10
11 import  javax.servlet.ServletContext;
12 import  javax.sql.DataSource;
13 import  javax.servlet.http. * ;
14
15 public   final   class  LoginAction  extends  Action {  
16    public ActionForward execute(
17        ActionMapping mapping,
18        ActionForm form,
19        HttpServletRequest request,  
20        HttpServletResponse response) throws Exception {
21        
22    
23           UserForm userform = (UserForm) form;         
24        String name = userform.getName();
25        String psw = userform.getPsw();
26        
27
28           ServletContext context = servlet.getServletContext();
29DataSource
30dataSource=(DataSource)context.getAttribute("oracleDB1");
31                        
32        DBUser dbuser = new DBUser(dataSource);
33        HttpSession session = request.getSession();
34        
35        if (!dbuser.checkUser(name,psw)) {
36            ActionMessages errors = new ActionMessages();
37            errors.add(ActionMessages.GLOBAL_MESSAGE,
38                new ActionMessage("label.deny"));
39                
40            if (!errors.isEmpty()) {
41                saveErrors(request, errors);
42            } 
43              return  mapping.findForward("failed");  //登陆失败
44        }
45        else{
46                return (mapping.findForward("successed"));//登陆成功                    
47        }    
48    }
49}
50

 1 UserForm.java
 2
 3 import  org.apache.struts.action.ActionForm;
 4 import  org.apache.struts.action.ActionMapping;
 5 import  javax.servlet.http.HttpServletRequest;
 6 import  org.apache.struts.action.ActionErrors;
 7 import  org.apache.struts.action.ActionMessage;
 8
 9 public   class  UserForm  extends  ActionForm  {
10
11
12    private String psw;
13
14    private String name;
15
16
17
18    public ActionErrors validate(ActionMapping mapping,
19            HttpServletRequest request) {
20            ActionErrors errors = new ActionErrors();
21            if ((name == null) || (name.equals(""))){
22                errors.add(ActionErrors.GLOBAL_MESSAGE,
23                    new ActionMessage("error.name.required"));
24            }
25            if((psw == null) || (psw.equals(""))){
26                errors.add(ActionErrors.GLOBAL_MESSAGE,new ActionMessage("error.psw.required"));
27            }
28            return errors;
29        }
30
31    
32     * @param mapping
33    
34    public void reset(ActionMapping mapping, HttpServletRequest request) {
35
36            }
37
38    
39    public String getPsw() {
40        return psw;
41    }
42
43    
44    public void setPsw(String psw) {
45        this.psw = psw;
46    }
47    public String getName() {
48        return name;
49    }
50
51    
52    public void setName(String name) {
53        this.name = name;
54    }
55
56}
57

 1 DBUser.java
 2
 3 import  javax.sql.DataSource;
 4 import  java.sql.Connection;
 5 import  java.sql.Statement;
 6 import  java.sql.ResultSet;
 7 import  java.sql.SQLException;
 8
 9 public   class  DBUser  {
10
11    DataSource dataSource;
12    
13    public DBUser(DataSource dataSource) {
14        
15            this.dataSource = dataSource;
16    }
17    
18    
19    public boolean checkUser(String name,String psw) throws Exception{
20        Connection connect = null;
21        String strSql;
22        ResultSet rs;
23        boolean result=false;
24        strSql = "select * from classuser where username='"
25                    + name + "' and password='" + psw + "'";
26        try {
27            connect = dataSource.getConnection();
28            Statement stmt = connect.createStatement();
29            rs = stmt.executeQuery(strSql);
30            if ( rs.next()) {
31                result=true;
32            }
33        } 
34        catch(SQLException ex) { 
35            ex.printStackTrace();
36        }
37        finally{
38            if(connect!=null)
39                connect.close();
40        }
41        return result;
42    
43    }
44    
45}
46

 1 Login.jsp
 2
 3 <% @ page contentType = " text/html;charset=GBK "  language = " java "   %>
 4 < body vLink = " #006666 "  link = " #003366 "  bgColor = " #E0F0F8 " >
 5 < img height = " 33 "  src = " enter.gif "  width = " 148 " >
 6 < form action = " login.do "  method = " post " >
 7 用户名：  < input size = " 15 "  name = " name " >< p >
 8 密  码：  < input type = " password "  size = " 15 "  name = " psw " >< p >
 9 < a href = " regist.do " > 新用户注册 </ A >|
10 < input type = " submit "  value = " 登录 " >
11 </ form >
12

1 Error.jsp
2
3 <% @ page contentType = " text/html;charset=GBK "  language = " java "   %>      
4 < h1 >< p >< img src = " cry.gif " > 对不起,登录失败！
5 </ p ></ h1 >
6 < a href = " login.jsp " > 重新登录 </ a >||
7 < a href = " regist.do " > 新用户注册 </ a >
8

 1 Right.jsp
 2
 3
 4 <% @ page contentType = " text/html;charset=GBK "  language = " java "   %>
 5 <% @ page  import   =   " classmate.* "   %>     
 6 <%
 7     UserForm formBean1  =  (UserForm)request.getAttribute( " userForm " );
 8      if (formBean1  !=   null   &&  formBean1.getName() != null ) {
 9%>
10<img src="smile.gif">
11热烈的欢迎您，
12<%=formBean1.getName()%> 用户！
13<%
14    } else {
15%>
16您无权访问本页面!
17<%}
18 %>
19 < br >< br >< br >
20 < a href = " login.jsp " > 重新登录 </ a >||
21 < a href = " regist.do " > 新用户注册 </ a >
22