JDBC批量加密数据库密码

package com.lxc.wmb;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import sun.misc.BASE64Encoder;
 
@SuppressWarnings("restriction")
public class MD5 {
   /**利用MD5进行加密*/
  public static String EncoderByMd5(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException{
    //确定计算方法
    MessageDigest md5=MessageDigest.getInstance("MD5");
    BASE64Encoder base64en = new BASE64Encoder();
    //加密后的字符串
    String newstr=base64en.encode(md5.digest(str.getBytes("utf-8")));
    return newstr;
  }
   
  /**判断用户密码是否正确
   *newpasswd 用户输入的密码
   *oldpasswd 正确密码*/
  public boolean checkpassword(String newpasswd,String oldpasswd) throws NoSuchAlgorithmException, UnsupportedEncodingException{
    if(EncoderByMd5(newpasswd).equals(oldpasswd))
      return true;
    else
      return false;
  }
}

package com.lxc.wmb;

import java.io.UnsupportedEncodingException;
import java.security.NoSuchAlgorithmException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class UpdatePwd {
    public static void main(String[] args) {
        String url = "jdbc:mysql://test1256.db.58dns.org:23384/db58_fbu_payment?useUnicode=true&characterEncoding=UTF-8&connectTimeout=60000&socketTimeout=60000";
        String userName = "fbupay_admin";
        String password = "7046e5127a93295c";
        updatePwd(url, userName, password);
    }

    private static void updatePwd(String url, String userName, String password) {
        Connection conn = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            conn = DriverManager.getConnection(url, userName, password);
            String sql = "SELECT ID,PASSWORD FROM FP_USER_BASE WHERE PASSWORD IS NOT NULL";
            ps = conn.prepareStatement(sql); 
            ps.executeQuery(); 
            rs = ps.executeQuery(); 
            List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
            while(rs.next()){  
                long id = rs.getLong("id");  
                String pwd = rs.getString("password");
                Map<String,Object> map = new HashMap<String, Object>();
                map.put("id", id);
                map.put("pwd", pwd);
                list.add(map);    
            } 
            for (Map<String, Object> map : list) {
                long id = (Long) map.get("id");
                String pwd = (String) map.get("pwd");
                String newPwd = MD5.EncoderByMd5(pwd);
                String updateSql = "UPDATE FP_USER_BASE SET PASSWORD = '"+newPwd+"' WHERE ID = "+id;
                ps.executeUpdate(updateSql);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }finally{
            try {
                rs.close();
                ps.close();
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}