工具类
- 获取ip
- MD5加密
- 获取验证码随机数
- 获取当前时间戳
- 获取随机长度的串
- 响应json数据给前端
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.security.MessageDigest;
import java.util.Random;
import java.util.UUID;
@Slf4j
public class CommonUtil {
/**
* 获取ip
*
* @param request
* @return
*/
public static String getIpAddr(HttpServletRequest request) {
String ipAddress = null;
try {
ipAddress = request.getHeader("x-forwarded-for");
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getHeader("Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getHeader("WL-Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getRemoteAddr();
if (ipAddress.equals("127.0.0.1")) {
// 根据网卡取本机配置的IP
InetAddress inet = null;
try {
inet = InetAddress.getLocalHost();
} catch (UnknownHostException e) {
e.printStackTrace();
}
ipAddress = inet.getHostAddress();
}
}
// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
if (ipAddress != null && ipAddress.length() > 15) {
// "***.***.***.***".length()
// = 15
if (ipAddress.indexOf(",") > 0) {
ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
}
}
} catch (Exception e) {
ipAddress = "";
}
return ipAddress;
}
/**
* MD5加密
*
* @param data
* @return
*/
public static String MD5(String data) {
try {
java.security.MessageDigest md = MessageDigest.getInstance("MD5");
byte[] array = md.digest(data.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte item : array) {
sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString().toUpperCase();
} catch (Exception exception) {
}
return null;
}
/**
* 获取验证码随机数
*
* @param length
* @return
*/
public static String getRandomCode(int length) {
String sources = "0123456789";
Random random = new Random();
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; j++) {
sb.append(sources.charAt(random.nextInt(9)));
}
return sb.toString();
}
/**
* 获取当前时间戳
*
* @return
*/
public static long getCurrentTimestamp() {
return System.currentTimeMillis();
}
/**
* 生成UUID
*
* @return
*/
public static String generateUUID() {
return UUID.randomUUID().toString().replaceAll("-", "").substring(0, 32);
}
/**
* 获取随机长度的串
*
* @param length
* @return
*/
private static final String ALL_CHAR_NUM = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
public static String getStringNumRandom(int length) {
Random random = new Random();
StringBuilder saltString = new StringBuilder(length);
for (int i = 0; i < length; i++) {
saltString.append(ALL_CHAR_NUM.charAt(random.nextInt(ALL_CHAR_NUM.length())));
}
return saltString.toString();
}
/**
* 响应json数据给前端
*
* @param response
* @param obj
*/
public static void sendJsonMessage(HttpServletResponse response, Object obj) {
ObjectMapper objectMapper = new ObjectMapper();
response.setContentType("application/json; charset=utf-8");
try (PrintWriter writer = response.getWriter()) {
writer.print(objectMapper.writeValueAsString(obj));
response.flushBuffer();
} catch (IOException e) {
log.warn("响应前端json数据给前端异常:{}", e);
}
}
}
接口统一协议 JsonData工具类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class JsonData {
/**
* 状态码 0 表示成功，1表示处理中，-1表示失败
*/
private Integer code;
/**
* 数据
*/
private Object data;
/**
* 描述
*/
private String msg;
/**
* 成功，传入数据
* @return
*/
public static JsonData buildSuccess() {
return new JsonData(0, null, null);
}
/**
* 成功，传入数据
* @param data
* @return
*/
public static JsonData buildSuccess(Object data) {
return new JsonData(0, data, null);
}
/**
* 失败，传入描述信息
* @param msg
* @return
*/
public static JsonData buildError(String msg) {
return new JsonData(-1, null, msg);
}
/**
* 自定义状态码和错误信息
* @param code
* @param msg
* @return
*/
public static JsonData buildCodeAndMsg(int code, String msg) {
return new JsonData(code, null, msg);
}
/**
* 传入枚举，返回信息
* @param codeEnum
* @return
*/
public static JsonData buildResult(BizCodeEnum codeEnum){
return JsonData.buildCodeAndMsg(codeEnum.getCode(),codeEnum.getMessage());
}
}
自定义全局异常 处理器开发
/**
* 全局异常处理
*/
@Data
public class BizException extends RuntimeException {
private Integer code;
private String msg;
public BizException(Integer code, String message) {
super(message);
this.code = code;
this.msg = message;
}
public BizException(BizCodeEnum bizCodeEnum) {
super(bizCodeEnum.getMsg());
this.code = bizCodeEnum.getCode();
this.msg = bizCodeEnum.getMsg();
}
}
@ControllerAdvice
@Slf4j
public class ExceptionHandle {
/**
* 自定义异常处理器
*/
@ExceptionHandler(value = Exception.class)
@ResponseBody
public JsonData Handle(Exception e) {
if (e instanceof BizException) {
BizException bizException = (BizException) e;
log.info("[业务异常]{}", e);
return JsonData.buildError(bizException.getMsg(), bizException.getCode());
} else {
log.info("[系统异常]{}", e);
return JsonData.buildError("全局异常，未知错误");
}
}
}
邮箱工具类正则
public class CheckUtil {
/**
* 邮箱正则
*/
private static final Pattern MAIL_PATTERN = Pattern.compile("^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$");
/**
* 手机号正则，暂时未用
*/
private static final Pattern PHONE_PATTERN = Pattern.compile("^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$");
/**
* @param email
* @return
*/
public static boolean isEmail(String email) {
if (null == email || "".equals(email)) {
return false;
}
Matcher m = MAIL_PATTERN.matcher(email);
return m.matches();
}
/**
* 暂时未用
* @param phone
* @return
*/
public static boolean isPhone(String phone) {
if (null == phone || "".equals(phone)) {
return false;
}
Matcher m = PHONE_PATTERN.matcher(phone);
return m.matches();
}
}
