📄 editpwd.java
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package webmailservlet;import javax.servlet.*;import javax.servlet.http.*;import java.io.*;import java.util.*;import java.sql.*;public class editpwd extends HttpServlet { private static final String CONTENT_TYPE = "text/html; charset=GBK"; /**Initialize global variables*/ public void init() throws ServletException { String sDBDriver = "sun.jdbc.odbc.JdbcOdbcDriver"; try { Class.forName(sDBDriver); } catch(java.lang.ClassNotFoundException e) { System.err.println( e.getMessage()); } } public ResultSet executeQuery(String sql) { String sConnStr = "jdbc:odbc:webmail"; Connection connect = null; ResultSet rs = null; rs = null; try { connect = DriverManager.getConnection(sConnStr); Statement stmt = connect.createStatement(); rs = stmt.executeQuery(sql); } catch(SQLException ex) { System.err.println(ex.getMessage()); } return rs; } public String getStr(String str) { try { String temp_p=str; byte[] temp_t=temp_p.getBytes("ISO8859-1"); String temp=new String(temp_t); return temp; } catch(Exception e) { } return "null"; } /**Process the HTTP Get request*/ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); out.println("<html>"); out.println("<head><title>editpwd</title></head>"); out.println("<body>"); out.println("<p>The servlet has received a GET. This is the reply.</p>"); out.println("</body></html>"); } /**Process the HTTP Post request*/ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); HttpSession session=request.getSession(true); out.println("<html>"); out.println("<head><title>editpwd</title></head>"); out.println("<body>"); out.println("<table align=center border=0 width=760 cellspacing=0 cellpadding=0 height=355>"); out.println("<tr> "); out.println("<td width=150 height=355 valign=top> "); out.println("</td> "); out.println("<td width=10 height=100%></td>"); out.println("<td width=1 height=100% bgcolor=#3399ff></td>"); out.println("<td width=10 height=100%></td>"); out.println("<td width=589 height=331 valign=top background=images/bg1.gif> "); out.println("<table border=0 width=100% cellspacing=0 cellpadding=0 height=307> "); out.println("<tr>"); out.println("<td width=100% colspan=2 height=20 bgcolor=#3399ff> <font color=#ffffff>修改密码</font>"); out.println("</td>"); out.println(" </tr>"); out.println("<tr> <td colspan=2 align=center>"); out.println("提示信息："); out.println(" </td>"); out.println("</tr>"); out.println(" <tr> <td colspan=2 align=center>"); String userID,oldPass,newPass,cfmnewpass;userID=(String)session.getAttribute("username");oldPass=request.getParameter("oldpass");newPass=request.getParameter("newpass");cfmnewpass=request.getParameter("cfmnewpass");String sql,pwd,errorMsg;pwd="";errorMsg="";boolean temp;ResultSet RS;sql="select * from member where logname='"+userID+"'";RS=executeQuery(sql);try{if(RS.next()){ pwd=RS.getString("password"); if((pwd==oldPass)||(pwd.equals(oldPass))) { temp=true; } else { errorMsg="你输入的旧密码不对！"; temp=false; }}else{ errorMsg="用户名不存在！";}}catch(Exception e){ System.err.println(e.getMessage());}if((newPass==cfmnewpass)||(newPass.equals(cfmnewpass))){ temp=true;}else{ errorMsg="你两次输入的密码不匹配！"; temp=false;}if(temp){ String sqlEdit; sqlEdit="update member set password='"+newPass+"' where logname='"+userID+"'"; executeQuery(sqlEdit); errorMsg="您已经成功的修改完密码！";}out.println(errorMsg); out.println(" </td>"); out.println("</tr>"); out.println("<tr> "); out.println(" <td colspan=2 height=150 align=right> </td>"); out.println("</tr>"); out.println(" </table> "); out.println("</td>"); out.println("</tr>"); out.println("</table>"); out.println("</body></html>"); } /**Clean up resources*/ public void destroy() { }}⌨️ 快捷键说明
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