[入门]永远的用户登录 - 学习中
2012-01-11 14:03
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安装mysql 并下载mysql-connector-java 并把里面的jar放到 C:\Program Files\Java\jdk1.6.0_10\(前面是jdk路径)jre\lib\ext
先创建dabase - onepc 然后
MyFunc.java
先创建dabase - onepc 然后
create table users ( userid VARCHAR(32) not null primary key, #用户登录id userpass varchar(32) not null, #用户密码 md5(md5+rand) = 先把密码用md5加密 然后再把加密后的与8位随机码拼接之后再用md5加密 randomstr varchar(8) not null #8位随机码 )
MyFunc.java
package wen.func; //import java.sql.*; import java.util.Random; import java.security.MessageDigest; public class MyFunc { private static char chartable[] = {'~','!','#','$','%','^','&','0','1','2','3','4','5','6','7','8','9','@','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','+','_','-','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'}; private String strRandom; //private String strMd5; public MyFunc() { setRand(); } public static String MD5(String source) { //byte[] source //String temp; try{ MessageDigest md = MessageDigest.getInstance("MD5"); md.update( source.getBytes() ); StringBuffer buf=new StringBuffer(); for(byte b:md.digest()) buf.append(String.format("%02x", b&0xff) ); return buf.toString(); //temp = buf.toString() }catch( Exception e ){ e.printStackTrace(); return null; //temp = null; } //this.strMd5 = temp; } public void setRand() { StringBuffer str= new StringBuffer(); Random rd = new Random(); for(int i=0;i<8;i++) { str.append(chartable[rd.nextInt(chartable.length)]); } this.strRandom=str.toString(); } public String getRand() { return this.strRandom; } }
package wen.odata; import java.sql.*; public class MyOData { private static final String DBDRIVER = "org.gjt.mm.mysql.Driver"; private static final String DBURL = "jdbc:mysql://localhost:3306/onepc"; private static final String DBUSER = "root"; private static final String DBPASS="root"; private Connection conn = null; //private PreparedStatement pstmt = null; //private ResultSet rs=null; public MyOData() throws Exception { try { Class.forName(DBDRIVER); this.conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS); }catch (Exception e) { throw e; } } public void close() throws Exception { if(this.conn!=null) { try { this.conn.close(); }catch(Exception e) { throw e; } } } public void AddUser(String user,String pass,String rand) throws SQLException { PreparedStatement pstmt = null; String sql = "insert into users(userid,userpass,randomstr) values(?,?,?)"; pstmt = conn.prepareStatement(sql); pstmt.setString(1,user); pstmt.setString(2, pass); pstmt.setString(3, rand); pstmt.executeUpdate(); pstmt.close(); } }
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %> <%@ page import="wen.func.*"%> <%@ page import="wen.odata.*"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Test</title> </head> <body> <% //MyFunc a = new MyFunc(); //out.println(a.getRand()); String user = request.getParameter("user"); String pass = request.getParameter("pass"); String random = request.getParameter("random"); pass = MyFunc.MD5(pass); out.println(pass+"<br>"); pass = pass+random; out.println(pass+"<br>"); pass = MyFunc.MD5(pass); out.println(pass+"<br>"); MyOData add = new MyOData(); add.AddUser(user,pass,random); %> </body> </html>
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