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数据加密重中之重个铁铁
先准备加解密工具类
package com.byyl.web.utils; import org.springframework.util.Base64Utils; import
javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.
SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import java.security.
SecureRandom; /** * DES加密工具类 */ public class DES { private static final String
algorithm= "DES"; private static final String key = "sssss"; /** * 加密 * *
@return * @throws Exception */ public static String encrypt(String data){ try {
byte[] bt = encrypt(data.getBytes(), key.getBytes()); return Base64Utils.
encodeToString(bt); }catch (Exception e){ return null; } } /** * 解密 * * @return
* @throws Exception */ public static String decrypt(String data){ if (data ==
null) return null; try{ byte[] bt = decrypt(Base64Utils.decodeFromString(data),
key.getBytes()); return new String(bt); }catch (Exception e){ return null; } }
/** * 根据键值进行加密 */ private static byte[] encrypt(byte[] data, byte[] key) throws
Exception { return initCipher(data, key, Cipher.ENCRYPT_MODE); } /** * 根据键值进行解密
*/ private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
return initCipher(data, key, Cipher.DECRYPT_MODE); } public static byte[]
initCipher(byte[] data, byte[] key, int decryptMode) throws Exception { /**
生成一个可信任的随机数源 **/ SecureRandom sr = new SecureRandom(); /**
从原始密钥数据创建DESKeySpec对象 **/ DESKeySpec dks = new DESKeySpec(key); /**
创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象 **/ SecretKeyFactory keyFactory =
SecretKeyFactory.getInstance(algorithm); /** 将DESKeySpec对象转换成SecretKey对象 **/
SecretKey securekey = keyFactory.generateSecret(dks); /** Cipher对象实际完成加密或解密操作
**/ Cipher cipher = Cipher.getInstance(algorithm); /** 用密钥初始化Cipher对象 **/ cipher
.init(decryptMode, securekey, sr); return cipher.doFinal(data); } public static
void main(String[] args) throws Exception { // 待加密内容 String data = "helloworld";
// 密码，长度要是8的倍数 //加密 String str = DES.encrypt(data); System.out.println(str);
//解密 System.out.println(DES.decrypt(str)); } }
编写自定义加解密Handler类继承 BaseTypeHandler
package com.byyl.web.config; import com.byyl.web.utils.DES; import org.apache.
ibatis.type.BaseTypeHandler; import org.apache.ibatis.type.JdbcType; import java
.sql.CallableStatement; import java.sql.PreparedStatement; import java.sql.
ResultSet; import java.sql.SQLException; /** * 配置mybatis 敏感数据加密 */ public class
DesEncryptHandler extends BaseTypeHandler { @Override public void
setNonNullParameter(PreparedStatement preparedStatement, int i, Object o,
JdbcType jdbcType) throws SQLException { preparedStatement.setString(i, DES.
encrypt((String)o)); } @Override public Object getNullableResult(ResultSet
resultSet, String s) throws SQLException { String columnValue = resultSet.
getString(s); return DES.decrypt(columnValue); } @Override public Object
getNullableResult(ResultSet resultSet, int i) throws SQLException { String
columnValue= resultSet.getString(i); return DES.decrypt(columnValue); }
@Override public Object getNullableResult(CallableStatement callableStatement,
int i) throws SQLException { String columnValue = callableStatement.getString(i)
; return DES.decrypt(columnValue); } }
类中使用
@Data @EqualsAndHashCode(callSuper = false) //autoResultMap = true 要有否则查询时无法解密
@TableName(value = "vd_patient",autoResultMap = true ) @ApiModel(value=
"VdPatient对象") public class VdPatient implements Serializable {
//typeHandle设置成自己编写的DesEncryptHandler @TableField(typeHandler =
DesEncryptHandler.class) private String idCard; }