SSM implements the mysql database account password ciphertext login function

package com.hzdy.DCAD.common.util;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import java.security.Key;
import java.security.SecureRandom;
/**
 * Created by Wongy on 2019/8/8.
 */
public class DESUtil {
  private static Key key;
  //Own keyprivate static String KEY_STR = "mykey";
  static {
    try {
      KeyGenerator generator = KeyGenerator.getInstance("DES");
      SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
      secureRandom.setSeed(KEY_STR.getBytes());
      generator.init(secureRandom);
      key = generator.generateKey();
      generator = null;
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  /**
   * Encrypt the string and return the BASE64 encrypted string*
   * @param str
   * @return
   * @see [class, class#method, class#member]
   */
  public static String getEncryptString(String str) {
    BASE64Encoder base64Encoder = new BASE64Encoder();
    try {
      byte[] strBytes = str.getBytes("UTF-8");
      Cipher cipher = Cipher.getInstance("DES");
      cipher.init(Cipher.ENCRYPT_MODE, key);
      byte[] encryptStrBytes = cipher.doFinal(strBytes);
      return base64Encoder.encode(encryptStrBytes);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  /**
   * Decrypt the BASE64 encrypted string *
   */
  public static String getDecryptString(String str) {
    BASE64Decoder base64Decoder = new BASE64Decoder();
    try {
      byte[] strBytes = base64Decoder.decodeBuffer(str);
      Cipher cipher = Cipher.getInstance("DES");
      cipher.init(Cipher.DECRYPT_MODE, key);
      byte[] encryptStrBytes = cipher.doFinal(strBytes);
      return new String(encryptStrBytes, "UTF-8");
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  public static void main(String[] args) {
    String name = "dbuser";
    String password = "waction2016";
    String encryname = getEncryptString(name);
    String encrypassword = getEncryptString(password);
    System.out.println("encryname : " + encryname);
    System.out.println("encrypassword : " + encrypassword);
    System.out.println("name : " + getDecryptString(encryname));
    System.out.println("password : " + getDecryptString(encrypassword));
  }
}

package com.hzdy.DCAD.common.util;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
public class EncryptPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
  //The property must remain consistent with the KEY of the configuration file private String[] encryptPropNames = {"jdbc.username", "jdbc.password"};
  @Override
  protected String convertProperty(String propertyName, String propertyValue) {
    //If the property is found in the list of encrypted properties if (isEncryptProp(propertyName)) {
      String decryptValue = DESUtil.getDecryptString(propertyValue);
      System.out.println(decryptValue);
      return decryptValue;
    } else {
      return propertyValue;
    }
  }
  private boolean isEncryptProp(String propertyName) {
    for (String encryptName : encryptPropNames) {
      if (encryptName.equals(propertyName)) {
        return true;
      }
    }
    return false;
  }
}

#Before encrypting the configuration#jdbc.driver=com.mysql.jdbc.Driver
#jdbc.user=root
#jdbc.password=root
#jdbc.url=jdbc:mysql://localhost:3306/bookstore
#After encryption configuration jdbc.driver=com.mysql.jdbc.Driver
jdbc.user=Ov4j7fKiCzY=
jdbc.password=Ov4j7fKiCzY=
jdbc.url=jdbc:mysql://localhost:3306/bookstore

Change <context:property-placeholder location="classpath:.properties" /> in spring-context
 Modify to <bean class="com.hzdy.DCAD.common.util.EncryptPropertyPlaceholderConfigurer"p:locations="classpath:*.properties"/>
 //Note that there can only be one bean that reads the configuration file, otherwise the system will only read the first one

package com.thinkgem.jeesite.common.encrypt;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import javax.security.auth.callback.PasswordCallback;
import com.alibaba.druid.util.DruidPasswordCallback;
/**
 */
@SuppressWarnings("serial")
public class DruidDataSource extends com.alibaba.druid.pool.DruidDataSource {
  public PhysicalConnectionInfo createPhysicalConnection() throws SQLException {
    String url = this.getUrl();
    Properties connectProperties = getConnectProperties();
    String user;
    if (getUserCallback() != null) {
      user = getUserCallback().getName();
    } else {
      user = getUsername();
    }
    //DES decryption user = DESUtils.getDecryptString(user);
    String password = DESUtils.getDecryptString(getPassword());
    PasswordCallback passwordCallback = getPasswordCallback();
    if (passwordCallback != null) {
      if (passwordCallback instanceof DruidPasswordCallback) {
        DruidPasswordCallback druidPasswordCallback = (DruidPasswordCallback) passwordCallback;
        druidPasswordCallback.setUrl(url);
        druidPasswordCallback.setProperties(connectProperties);
      }
      char[] chars = passwordCallback.getPassword();
      if (chars != null) {
        password = new String(chars);
      }
    }
    Properties physicalConnectProperties = new Properties();
    if (connectProperties != null) {
      physicalConnectProperties.putAll(connectProperties);
    }
    if (user != null && user.length() != 0) {
      physicalConnectProperties.put("user", user);
    }
    if (password != null && password.length() != 0) {
      physicalConnectProperties.put("password", password);
    }
    Connection conn;
    long connectStartNanos = System.nanoTime();
    long connectedNanos, initedNanos, validatedNanos;
    try {
      conn = createPhysicalConnection(url, physicalConnectProperties);
      connectedNanos = System.nanoTime();
      if (conn == null) {
        throw new SQLException("connect error, url " + url + ", driverClass " + this.driverClass);
      }
      initPhysicalConnection(conn);
      initedNanos = System.nanoTime();
      validateConnection(conn);
      validatedNanos = System.nanoTime();
      setCreateError(null);
    } catch (SQLException ex) {
      setCreateError(ex);
      throw ex;
    } catch (RuntimeException ex) {
      setCreateError(ex);
      throw ex;
    } catch (Error ex) {
      createErrorCount.incrementAndGet();
      throw ex;
    finally
      long nano = System.nanoTime() - connectStartNanos;
      createTimespan += nano;
    }
    return new PhysicalConnectionInfo(conn, connectStartNanos, connectedNanos, initedNanos, validatedNanos);
  }
}

#Before modification<!-- <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> -->
#After modification <bean id="dataSource"class="com.thinkgem.jeesite.common.encrypt.DruidDataSource" 
    init-method="init" destroy-method="close">
    <!-- The data source driver class can be omitted. Druid will automatically identify the DriverClass based on the URL by default -->
    <property name="driverClassName" value="${jdbc.driver}" />
    <!-- Basic attributes url, user, password -->
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />

  </bean>