工具类常用

ThreadLocal

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

public class ThreadLocalUtil {

    private static final ThreadLocal<Map<String, Object>> threadLocal = ThreadLocal.withInitial(() -> new HashMap<>(10));
    public static Map<String, Object> getThreadLocal() {
        return threadLocal.get();
    }

    public static <T> T get(String key) {
        Map<String, Object> map = threadLocal.get();
        return get(key, null);
    }

    @SuppressWarnings("unchecked")
    public static <T> T get(String key, T defaultValue) {
        Map<String, Object> map = threadLocal.get();
        return (T) Optional.ofNullable(map.get(key)).orElse(defaultValue);
    }

    public static void set(String key, Object value) {
        Map<String, Object> map = threadLocal.get();
        map.put(key, value);
    }

    public static void set(Map<String, Object> keyValueMap) {
        Map<String, Object> map = threadLocal.get();
        map.putAll(keyValueMap);
    }

    public static void remove() {
        threadLocal.remove();
    }

    @SuppressWarnings("unchecked")
    public static <T> T remove(String key) {
        Map<String, Object> map = threadLocal.get();
        return (T) map.remove(key);
    }
}

对象复制 

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.FIELD;

/**
 * 对象复制注解
 * CopyUtil对象复制工具类使用
 */
@Target({FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CopyAnnotation {
    /**
     * 目标字段
     * @return
     */
    String value();

    /**
     * 目标字段所在类型
     * @return
     */
    Class type();
}




import com.tencent.finance.enums.CopyAnnotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class CopyBeanUtil {

    private static Class myAnnotation = CopyAnnotation.class;

    /**
     * 对象属性赋值方法
     * 将 V 中的属性值，按照属性名的对应关系，复制到 K 中去
     * @param target   K 目标类
     * @param source   V 源对象
     * @param <K> 泛型
     * @param <V> 泛型
     */
    public static <K, V> void copyProperties(V source,K target) {
        // 1.通过反射获取到b的属性值列表
        Field[] fields = target.getClass().getDeclaredFields();
        try {
            for (Field field : fields) {
                // 1.获取属性名到源对象中的属性值（getter方式）
                Object value = getFieldValueByName(field.getName(), source);
                // 2.如果属性值为null，跳过该属性复制
                if (value == null) {
                    continue;
                }
                // 3.获取属性CopyAnnotation注解（自定义）的value值（对应的是目标对象的属性名）
                //    没有自定义注解，或者自定义注解没有对value属性赋值：使用原有的属性名
                String annotationName = getMyAnnotationValue(field);
                // 4.使用setter的方式将值复制到目标对象
                setTargetFieldValueByNameAndValue(target, annotationName, field.getType(), value);
            }
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        System.out.println("====================对象属性赋值完成====================");
    }

    /**
     * 根据属性名，对象获取对象的属性值
     *
     * @param name 属性名
     * @param v    对象
     * @param <V>  泛型方法
     * @return Object 属性值
     * @throws IllegalAccessException    IllegalAccessException
     * @throws NoSuchMethodException     NoSuchMethodException
     * @throws InvocationTargetException InvocationTargetException
     */
    private static <V> Object getFieldValueByName(String name, V v)
            throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
        String firstLetter = name.substring(0, 1).toUpperCase();
        String getter = "get" + firstLetter + name.substring(1);
        Method method = v.getClass().getMethod(getter, new Class[]{});
        return method.invoke(v, new Class[]{});
    }

    /**
     * 根据对象、属性名、参数类型、参数值
     * 使用反射调用setter进行对象属性的赋值操作
     *
     * @param k              对象
     * @param fieldName      属性名
     * @param parameterClass 参数类型
     * @param value          参数值
     * @param <K>            泛型
     * @throws NoSuchMethodException     NoSuchMethodException
     * @throws InvocationTargetException InvocationTargetException
     * @throws IllegalAccessException    IllegalAccessException
     */
    private static <K> void setTargetFieldValueByNameAndValue(K k, String fieldName, Class parameterClass, Object value)
            throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        String firstLetter = fieldName.substring(0, 1).toUpperCase();
        String setter = "set" + firstLetter + fieldName.substring(1);
        Method method;
        method = k.getClass().getMethod(setter, new Class[]{parameterClass});
        method.invoke(k, value);
    }

    /**
     * 获取属性上自定义注解的value值
     *
     * @param field Field
     * @return String
     */
    private static String getMyAnnotationValue(Field field) {
        CopyAnnotation annotation = (CopyAnnotation) field.getAnnotation(myAnnotation);
        if (annotation == null || annotation.value() == null) {
            return field.getName();
        }
        return annotation.value();
    }
}

加解密

import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.interfaces.ECPrivateKey;
import org.bouncycastle.jce.interfaces.ECPublicKey;
import javax.crypto.Cipher;
import java.security.*;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;

public class ECCUtil {

    static {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    }

    //生成秘钥对
    public static KeyPair getKeyPair() throws Exception {
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC", "BC");
        keyPairGenerator.initialize(256, new SecureRandom());
        KeyPair keyPair = keyPairGenerator.generateKeyPair();
        return keyPair;
    }

    //获取公钥(Base64编码)
    public static String getPublicKey(KeyPair keyPair){
        ECPublicKey publicKey = (ECPublicKey) keyPair.getPublic();
        byte[] bytes = publicKey.getEncoded();
        return  Base64.encodeBase64String(bytes);
    }

    //获取私钥(Base64编码)
    public static String getPrivateKey(KeyPair keyPair){
        ECPrivateKey privateKey = (ECPrivateKey) keyPair.getPrivate();
        byte[] bytes = privateKey.getEncoded();
        return Base64.encodeBase64String(bytes);
    }

    //将Base64编码后的公钥转换成PublicKey对象
    public static ECPublicKey string2PublicKey(String pubStr) throws Exception{
        byte[] keyBytes = Base64.decodeBase64(pubStr);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance("EC", "BC");
        ECPublicKey publicKey = (ECPublicKey) keyFactory.generatePublic(keySpec);
        return publicKey;
    }

    //将Base64编码后的私钥转换成PrivateKey对象
    public static ECPrivateKey string2PrivateKey(String priStr) throws Exception{
        byte[] keyBytes = Base64.decodeBase64(priStr);
        PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance("EC", "BC");
        ECPrivateKey privateKey = (ECPrivateKey) keyFactory.generatePrivate(keySpec);
        return privateKey;
    }

    //公钥加密
    public static byte[] publicEncrypt(byte[] content, PublicKey publicKey) throws Exception{
        Cipher cipher = Cipher.getInstance("ECIES", "BC");
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        byte[] bytes = cipher.doFinal(content);
        return bytes;
    }

    //私钥解密
    public static byte[] privateDecrypt(byte[] content, PrivateKey privateKey) throws Exception{
        Cipher cipher = Cipher.getInstance("ECIES", "BC");
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        byte[] bytes = cipher.doFinal(content);
        return bytes;
    }
}

import cn.hutool.core.codec.Base64Decoder;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;

public class EncryptUtils {

    private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";

    /**
     * base 64 encode
     *
     * @param bytes 待编码的byte[]
     * @return 编码后的base 64 code
     */
    private static String base64Encode(byte[] bytes) {
        return Base64.encodeBase64String(bytes);

    }

    /**
     * base 64 decode
     *
     * @param base64Code 待解码的base 64 code
     * @return 解码后的byte[]
     * @throws Exception 抛出异常
     */
    private static byte[] base64Decode(String base64Code) throws Exception {
        return StringUtils.isEmpty(base64Code) ? null : Base64Decoder.decode(base64Code);
    }

    /**
     * AES加密
     *
     * @param content    待加密的内容
     * @param encryptKey 加密密钥
     * @return 加密后的byte[]
     */
    private static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));
        return cipher.doFinal(content.getBytes("utf-8"));
    }

    /**
     * AES加密为base 64 code
     *
     * @param content    待加密的内容
     * @param encryptKey 加密密钥
     * @return 加密后的base 64 code
     */
    public static String aesEncrypt(String content, String encryptKey) throws Exception {
        return base64Encode(aesEncryptToBytes(content, encryptKey));
    }

    /**
     * AES解密
     *
     * @param encryptBytes 待解密的byte[]
     * @param decryptKey   解密密钥
     * @return 解密后的String
     */
    private static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);

        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
        byte[] decryptBytes = cipher.doFinal(encryptBytes);
        return new String(decryptBytes);
    }

    /**
     * 将base 64 code AES解密
     *
     * @param encryptStr 待解密的base 64 code
     * @param decryptKey 解密密钥
     * @return 解密后的string
     */
    public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
        return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
    }
}

import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

public class RSAEncryptUtil {

    private static Map<Integer, String> keyMap = new HashMap<Integer, String>();  //用于封装随机产生的公钥与私钥

    /**
     * 随机生成密钥对
     * @throws NoSuchAlgorithmException
     */
    public static Map<String,String> genKeyPair() throws NoSuchAlgorithmException {
        // KeyPairGenerator类用于生成公钥和私钥对，基于RSA算法生成对象
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
        // 初始化密钥对生成器，密钥大小为96-1024位
        keyPairGen.initialize(1024,new SecureRandom());
        // 生成一个密钥对，保存在keyPair中
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();   // 得到私钥
        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();  // 得到公钥
        String publicKeyString = new String(Base64.encodeBase64(publicKey.getEncoded()));
        // 得到私钥字符串
        String privateKeyString = new String(Base64.encodeBase64((privateKey.getEncoded())));
        // 将公钥和私钥保存到Map
        keyMap.put(0,publicKeyString);  //0表示公钥
        keyMap.put(1,privateKeyString);  //1表示私钥
        Map<String, String> map = new HashMap<>();
        map.put("publicKeyString", publicKeyString);
        map.put("privateKeyString", privateKeyString);
        return map;
    }
    /**
     * RSA公钥加密
     *
     * @param str   加密字符串
     * @param publicKey 公钥
     * @return 密文
     * @throws Exception 加密过程中的异常信息
     */
    public static String encrypt( String str, String publicKey ) throws Exception{
        //base64编码的公钥
        byte[] decoded = Base64.decodeBase64(publicKey);
        RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
        //RSA加密
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.ENCRYPT_MODE, pubKey);
        String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));
        return outStr;
    }

    /**
     * RSA私钥解密
     *
     * @param str 加密字符串
     * @param privateKey 私钥
     * @return 密文
     * @throws Exception 解密过程中的异常信息
     */
    public static String decrypt(String str, String privateKey) throws Exception{
        //64位解码加密后的字符串
        byte[] inputByte = Base64.decodeBase64(str.getBytes("UTF-8"));
        //base64编码的私钥
        byte[] decoded = Base64.decodeBase64(privateKey);
        RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
        //RSA解密
        //Cipher cipher = Cipher.getInstance("RSA");
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        cipher.init(Cipher.DECRYPT_MODE, priKey);
        String outStr = new String(cipher.doFinal(inputByte));
        return outStr;
    }
}

id生成

import cn.hutool.core.lang.Snowflake;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.Date;
import java.util.concurrent.TimeUnit;

/**
 * id生成工具类
 */
@Slf4j
@Component
public class IdUtil {

    @Value("${redis_prefix}")
    private static String redisPrefix;

    private static final String PREFIX = "SF";

    // 默认redisKey
    private static final String DEFAULT_KEY = redisPrefix + IdUtil.class.getSimpleName() + "_";

    // 默认有序序号长度
    private static final int DEFAULT_LENGTH = 6;

    // 天的毫秒值
    private static final long DAY = 24 * 60 * 60 * 1000;

    @Resource
    private RedisUtil redisUtil;

    @Resource
    private Snowflake snowflake;

    // 获取当前时间年月日字符串
    private static String getNowDateStr() {
        return DateUtils.format(new Date(), "yyyyMMdd");
    }

    /**
     * 获取随机雪花id
     *
     * @return 获取随机雪花id
     */
    public String randomId() {
        return String.valueOf(snowflake.nextId());
    }

    /**
     * 获取随机UUID
     *
     * @return 随机UUID
     */
    public static String randomUUID() {
        return UUID.randomUUID().toString();
    }

    /**
     * 简化的UUID，去掉了横线
     *
     * @return 简化的UUID，去掉了横线
     */
    public static String simpleUUID() {
        return UUID.randomUUID().toString(true);
    }

    /**
     * 获取随机UUID，使用性能更好的ThreadLocalRandom生成UUID
     *
     * @return 随机UUID
     * @since 4.1.19
     */
    public static String fastUUID() {
        return UUID.fastUUID().toString();
    }

    /**
     * 简化的UUID，去掉了横线，使用性能更好的ThreadLocalRandom生成UUID
     *
     * @return 简化的UUID，去掉了横线
     * @since 4.1.19
     */
    public static String fastSimpleUUID() {
        return UUID.fastUUID().toString(true);
    }

    /**
     * 获取下一个自增有序id
     *
     * @param key 自增id的key，不同的key之间自增长数不会互相影响
     * @return 自增有序id
     */
    public String nextId(String key) {
        return nextId(key, DEFAULT_LENGTH);
    }

    /**
     * 获取融资申请编号
     * @return
     */
    public String applyNo(){
        // 获取当前年月日字符串
        String newDateStr = getNowDateStr();
        // redis键值（关键字+当前时间年月日）
        String redisKey = DEFAULT_KEY + PREFIX + newDateStr;
        // 自增数
        Long count = redisUtil.increment(redisKey, 1);

        if (redisUtil.getExpire(redisKey) == -1) {
            redisUtil.expire(redisKey, DAY, TimeUnit.MILLISECONDS);
        }

        return PREFIX + newDateStr + "-" + StringUtils.leftPad(String.valueOf(count), 4, "0");
    }

    /**
     * 获取下一个自增有序id
     *
     * @param key 自增id的key，不同的key之间自增长数不会互相影响
     * @param length 自增有序id长度（不是返回id的长度）
     * @return 自增有序id
     */
    public String nextId(String key, int length) {
        // 获取当前年月日字符串
        String newDateStr = getNowDateStr();
        // redis键值（关键字+当前时间年月日）
        String redisKey = DEFAULT_KEY + key + newDateStr;
        // 自增数
        Long count = redisUtil.increment(redisKey, 1);
        String serialNumber = StringUtils.leftPad(String.valueOf(count), length, "0");
        String nextId = DateUtils.format(new Date(), "yyyyMMddHHmmssSSS")
                + RandomUtil.randomInt(100000) + serialNumber;
        if (redisUtil.getExpire(redisKey) == -1) {
            redisUtil.expire(redisKey, DAY, TimeUnit.MILLISECONDS);
        }
        return nextId;
    }
}

ExceptionUtil

@Slf4j
public class ExceptionUtil {
    private ExceptionUtil() {
    }

    /**
     * 获取异常信息
     *
     * @param e 异常
     */
    public static String getErrorMessage(Exception e) {
        StringWriter sw = null;
        PrintWriter pw = null;
        try {
            sw = new StringWriter();
            pw = new PrintWriter(sw);
            // 将出错的栈信息输出到printWriter中
            e.printStackTrace(pw);
            pw.flush();
            sw.flush();
        } finally {
            if (sw != null) {
                try {
                    sw.close();
                } catch (IOException e1) {
                    log.info(e1.getMessage());
                }
            }
            if (pw != null) {
                pw.close();
            }
        }
        return sw.toString();
    }
    /**
     * 异常信息-->json
     *
     */
    /*public static String resultOf(ResultStatusCode resultStatusCode) {
        SerializeConfig config = new SerializeConfig();
        config.configEnumAsJavaBean(ResultStatusCode.class);
        return JSON.toJSONString(resultStatusCode, config);
    }*/
}

public class commonUtils {

public static boolean prosHandle(Object source, Object target, String type) {
        log.info("type={}",type);
        if (Objects.equals(type, "remove") && source == null) {
            return false;
        }
        if (Objects.equals(type, "copy")) {
            if (!(target != null && source != null)) {
                return false;
            }
            String oName = source.getClass().getName();
            String o1Name = target.getClass().getName();
            log.info("oName={},o1Name={},type={}", oName, o1Name, type);
            if (!oName.equals(o1Name)) {
                return false;
            }
        }
        
        Field[] fields = source.getClass().getDeclaredFields();
        for (int i = 0; i < fields.length; i++) {
            Field f = fields[i];
            try {
                switch (type) {
                    case "remove": f.set(source, null);break;
                    case "copy": f.set(target, f.get(source));break;
                }
            } catch (Exception e) {
                //return false;
            }
        }
        return true;
    }

}

最后

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