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一個(gè)簡(jiǎn)單的java學(xué)生寢室查詢系統(tǒng)

 更新時(shí)間：2017年10月21日 08:52:02   作者：數(shù)星星的咚咚咚  
這篇文章主要為大家詳細(xì)介紹了一個(gè)簡(jiǎn)單的java學(xué)生寢室查詢系統(tǒng)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了java學(xué)生寢室查詢系統(tǒng)的具體代碼，供大家參考，具體內(nèi)容如下

前端部分：

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>AHPU Freshman dormitory inquiry</title>
  <script src="confirm.js"></script>
<style>
html,body{
  margin:0px;
  padding:0px;
}
.main{
  position: relative;
  width:500px;
  height:500px; 
  background: url(image/ahpu1.jpg) no-repeat;
  margin:10px auto;
}
form>div{
  margin:20px 10px; 
}
address{
  position: absolute;
  bottom:20px;
  left:30px;
}
</style>  
</head>
<body>
  <div class="main">
    <form action="FindRoom/findInfo" method="post" >
      <div>
        <label for="sname" >姓名</label>
        <input type="text" name="sname" id="sname" required>
      </div>

      <div>
        <label for="sid">學(xué)號(hào)</label>
        <input type="text" name="sid" id="sid" required>
      </div>
      <div>
        <input id="submit" type="submit">
        <input id="reset" type="reset">
      </div>
    </form>
    <address><a href="javavscript:" rel="external nofollow" >雙微工作室</a></address>
  </div>

</body>
</html>

confrim.js:

var EventUtil={
  addhandler:function(element,type,handler){
     if(element.addEventListener){
       element.addEventListener(type,handler,false);  
     }else if(element.attachEvent){
       element.attachEvent("on"+type,handler);
     }else{
       element["on"+type]=handler;
     }
   },
   removehandler:function(element,type,handler){
     if(element.removeEventListener){
        element.removeEventListener(type,handler,false);
     }else if(element.detachEvent){
        element.detachEvent("on"+type,handler);
     }else{
        element["on"+type]=null;
     }
   },

   getEvent:function(event){
     return event?event:window.event;
   },
   getTarget:function(event){
     return event.target || event.srcElement;
   },
   preventDefault:function(event){
     if(event.preventDefault){
       event.preventDefault();
     }else{
       event.returnValue=false;
     }
   },
   stopPropagation:function(event){//只能阻止事件冒泡
     if(event.stopPropagation){
       event.stopPropagation();
     }else{
       event.cancelBubble=true;
     }
   }
};



function confirmName(){
  if(((sname.value).trim).length!=0){
    reg=/^[\u4e00-\u9fa5]{1,10}$/;
    if(!reg.test(sname.value)){
      sname.value="";
      alert("請(qǐng)輸入正確的姓名");
    } 
  }
}


function confirmSid(){
  if(((sid.value).trim()).length!=0){
    reg=/^([0-9]){10,10}$/;
    if(!reg.test(sid.value)){
      sid.value="";
      alert("請(qǐng)輸入正確的學(xué)號(hào)");
    }
  }    
}

function confirm(){
  EventUtil.addhandler(sname,"blur",confirmName);
  EventUtil.addhandler(sid,"blur",confirmSid);
}

window.onload=function(){
  var sname=document.querySelector("#sname");
  var sid=document.querySelector("#sid");
  var po=document.querySelector("#submit");
  confirm();
  EventUtil.addhandler(po,"submit",confrimName);
  EventUtil.addhandler(po,"submit",confrimSid);
};

后端java部分：

package FindRoom;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

//import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class findInfo extends HttpServlet {
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver"; 
    static final String DB_URL = "jdbc:mysql://localhost:3306/RoomQuery";
    // 數(shù)據(jù)庫(kù)的用戶名與密碼，需要根據(jù)自己的設(shè)置
    static final String USER = "root";
    static final String PASS = "cd7089028";
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    this.log("執(zhí)行doGet方法....");
    this.execute(request, response);
  }
  public void doPost(HttpServletRequest request,HttpServletResponse response)
      throws ServletException,IOException{
    this.log("執(zhí)行doPost方法....");
    this.execute(request,response);
  }
  //執(zhí)行方法
  public void execute(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    request.setCharacterEncoding("utf-8");
    response.setCharacterEncoding("utf-8");
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
    //StringBuffer requestURI=request.getRequestURL();
  // String method=request.getMethod();
    String sname=request.getParameter("sname");
    String sid=request.getParameter("sid");
    response.setContentType("text/html");
    //RequestDispatcher dispatcher=request.getRequestDispatcher("/RoomQuery/findInfo");
    Connection conn = null;
    Statement stmt = null;
     try{
        // 注冊(cè) JDBC 驅(qū)動(dòng)
        Class.forName(JDBC_DRIVER);
       // DriverManager.registerDriver(new com.mysql.jdbc.Driver());
        // 打開(kāi)鏈接
        System.out.println("連接數(shù)據(jù)庫(kù)...");
        conn = DriverManager.getConnection(DB_URL,USER,PASS);
        // 執(zhí)行查詢
        System.out.println(" 實(shí)例化Statement對(duì)...");
        stmt = conn.createStatement();
        String sql;
        sql = "SELECT * FROM SumRoid where SId="+sid;
        ResultSet rs = stmt.executeQuery(sql);
        // 展開(kāi)結(jié)果集數(shù)據(jù)庫(kù)
        while(rs.next()){
          // 通過(guò)字段檢索
          String flatNum=rs.getString("FlatNum");
          String bedrootNum=rs.getString("BedroomNum");
          String name = rs.getString("Sname");
          String Sid = rs.getString("SId");
          String ssex=rs.getString("Ssex");
          String academy=rs.getString("academy");
          String major=rs.getString("major");

          // 輸出數(shù)據(jù)
          out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
          out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
          out.println("<HTML>");
          out.println("<BODY>");
          out.println("<h3>"+sname+"同學(xué)歡迎你</h3>");
          out.println("<p>公寓號(hào)："+flatNum+"</p>"
            +"<p>寢室號(hào): " + bedrootNum+"</p>"
            +"<p>姓名: " + name+"</p>"
            +"<p>學(xué)號(hào): " + Sid+"</p>"
            +"<p>性別: " + ssex+"</p>"
            + "<p>學(xué)院: " + academy+"</p>"
            +"<p>專業(yè): " + major+"</p>");
        }
        out.println("<BODY>");
        out.println("</HTML>");         
        // 完成后關(guān)閉
        rs.close();
        stmt.close();
        conn.close();
        out.flush();
        out.close();
      }catch(SQLException se){
        // 處理 JDBC 錯(cuò)誤
        se.printStackTrace();
      }catch(Exception e){
        // 處理 Class.forName 錯(cuò)誤
        e.printStackTrace();
      }finally{
        // 關(guān)閉資源
        try{
          if(stmt!=null) stmt.close();
        }catch(SQLException se2){
        }// 什么都不做
        try{
          if(conn!=null) conn.close();
        }catch(SQLException se){
          se.printStackTrace();
        }
      }
   } 

}

數(shù)據(jù)庫(kù)mysql部分:

將excel中學(xué)生的信息存放在A盤(pán)的stu.txt文件中；

創(chuàng)建table:

復(fù)制代碼 代碼如下:
create table SumRoid(FlatNum char(10),BedroomNum char(3),Sname char(10),SId char(15),Ssex char(2),academy char(30),major char(20));

3 . 將數(shù)據(jù)讀入mysql數(shù)據(jù)庫(kù)中：

load data local infile 'A:/stu.txt' into table SumRoid;

至此，一個(gè)超級(jí)簡(jiǎn)單的查詢系統(tǒng)已完畢。

說(shuō)明:

1. 在做表單輸入驗(yàn)證時(shí)，bug很多；
2. jdbc的驅(qū)動(dòng)一定要導(dǎo)入web-inf lib中；
3. web.xml配置一定要檢查好；
4. 不能預(yù)防sql注入；

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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