Interceptor、Filter
通过上方这个图我们可以知道，在 Filter 和 Inteceptor 中间有一层Servlet。而Servlet就是提交request的地方。所以我们要重写HttpServletRequest方法只能在Servlet之前。也就是filter 中。
区别：
- servlet请求，顺序：Filter ——> interceptor。
- Filter的作用是对所有进行过滤，包括接口或者静态资源，interceptor 仅拦截 请求。
- Filter对请求或者资源进行过滤，筛选合适的请求或者资源。interceptor，仅对不符合的请求拦截。
- Filter基于回调函数，我们需要实现的filter接口中doFilter方法就是回调函数，而interceptor则基于 java本身的反射机制,这是两者最本质的区别。
- Filter是依赖于servlet容器的，即只能在servlet容器中执行，很显然没有servlet容器就无法来回调doFilter方法。而interceptor与servlet容器无关。
filter：目的就是可以以流的方式多次获取请求参数。
Interceptor：对回调接口进行统一的验证签名。
回调接口都需要验证签名，而且签名规则一样，所以想拿到拦截器处理。
如果签名或者ip地址不符合条件，直接就返回了。而具体的接口只要专注业务处理，不需要验证签名了。
下面贴一下在springboot中的使用：
一、Filter
如果请求是GET方法，可以直接通过getParameter(String param)方法读取指定参数，可读取多次；
而POST方法的参数是存储在输入流中，只能读一次，不能多次读取。
有时需要在filter里打印请求参数，因而在filter里读取post请求里的输入流后，会导致具体的controller里拿不到请求参数。
解决方法：
1、采用ThreadLocal，在filter里把读取到的post参数存入ThreadLocal里，而controller就可以再从ThreadLocal里把请求参数读取出来。
2、使用servlet提供的HttpServletRequestWrapper类，重写相关ServletRequest方法，实现多次读取的能力。
1.1 ThreadLocal方法
public class ThreadCache {
// ThreadLocal里只存储了简单的String对象，也可以自己定义对象，存储更加复杂的参数
private static ThreadLocal<String> threadLocal = new ThreadLocal<String>();
public static String getPostRequestParams{
return threadLocal.get();
}
public static void setPostRequestParams(String postRequestParams){
threadLocal.set(postRequestParams);
}
public static void removePostRequestParams(){
threadLocal.remove();
}
}
一个简单的filter：
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebFilter(value = {"/test/threadLocal/*"})
public class SimpleFilter implements Filter {
private static Logger log = LoggerFactory.getLogger(SimpleFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse res = (HttpServletResponse) response;
try {
if ("POST".equals(req.getMethod().toUpperCase())) {
// 获取请求参数
byte[] bytes = IOUtils.toByteArray(request.getInputStream());
String params = new String(bytes, req.getCharacterEncoding());
ThreadCache.setPostRequestParams(params);
log.info("filer-post请求参数:[params={}]", params);
} else {
log.info("非post请求");
}
chain.doFilter(request, response);
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
@Override
public void destroy() {
}
}
简单的测试controller
import com.sankuai.xm.ems.auth.filter.ThreadCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/test")
public class TestController {
private static Logger log = LoggerFactory.getLogger(TestController.class);
@RequestMapping(value = "/threadLocal/getPostRequestParams",method = RequestMethod.POST)
@ResponseBody
public void getPostRequestParams() {
String params = ThreadCache.getPostRequestParams();
log.info("controller-post请求参数:[params={}]", params);
}
}
这里我们只保存了post参数，从ThreadLocal中反复读取，而get方法的还需要从request里获取。
1.2 HttpServletRequestWrapper方法
方式一
- 实现一个HttpServletRequestWrapper子类
import org.apache.commons.io.IOUtils;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.*;
public class WrappedHttpServletRequest extends HttpServletRequestWrapper {
private byte[] bytes;
private WrappedServletInputStream wrappedServletInputStream;
public WrappedHttpServletRequest(HttpServletRequest request) throws IOException {
super(request);
// 读取输入流里的请求参数，并保存到bytes里
bytes = IOUtils.toByteArray(request.getInputStream());
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
this.wrappedServletInputStream = new WrappedServletInputStream(byteArrayInputStream);
// 很重要，把post参数重新写入请求流
reWriteInputStream();
}
/**
* 把参数重新写进请求里
*/
public void reWriteInputStream() {
wrappedServletInputStream.setStream(new ByteArrayInputStream(bytes != null ? bytes : new byte[0]));
}
@Override
public ServletInputStream getInputStream() throws IOException {
return wrappedServletInputStream;
}
@Override
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(wrappedServletInputStream));
}
/**
* 获取post参数，可以自己再转为相应格式
*/
public String getRequestParams() throws IOException {
return new String(bytes, this.getCharacterEncoding());
}
private class WrappedServletInputStream extends ServletInputStream {
public void setStream(InputStream stream) {
this.stream = stream;
}
private InputStream stream;
public WrappedServletInputStream(InputStream stream) {
this.stream = stream;
}
@Override
public int read() throws IOException {
return stream.read();
}
@Override
public boolean isFinished() {
return true;
}
@Override
public boolean isReady() {
return true;
}
@Override
public void setReadListener(ReadListener readListener) {
}
}
}
- 实现另一个filter
import com.sankuai.xm.ems.utils.wrap.WrappedHttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
@WebFilter(value = {"/test/wrapped/*"})
public class SimpleWrappedFilter implements Filter {
private static Logger log = LoggerFactory.getLogger(SimpleWrappedFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
try {
WrappedHttpServletRequest requestWrapper = new WrappedHttpServletRequest((HttpServletRequest) request);
if ("POST".equals(requestWrapper.getMethod().toUpperCase())) {
// 获取请求参数
String params = requestWrapper.getRequestParams();
log.info("filer-post请求参数:[params={}]", params);
} else {
log.info("非post请求");
}
// 这里doFilter传入我们实现的子类
chain.doFilter(requestWrapper, response);
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
@Override
public void destroy() {
}
}
方式二
- 实现一个HttpServletRequestWrapper子类
import org.springframework.util.StreamUtils;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* @Author: huangyibo
* @Date: 2023/1/5 15:10
* @Description: 处理无法重复读取stream流,使之可以在一个stream流中多次读取同一个request值
*/
public class HttpServletRequestWrapperImpl extends HttpServletRequestWrapper {
//用于将流保存下来
private final byte[] requestBody;
/**
* Constructs a request object wrapping the given request.
* @param request The request to wrap
* @throws IllegalArgumentException if the request is null
*/
public HttpServletRequestWrapperImpl(HttpServletRequest request) throws IOException {
super(request);
requestBody = StreamUtils.copyToByteArray(request.getInputStream());
}
@Override
public ServletInputStream getInputStream() {
final ByteArrayInputStream bais = new ByteArrayInputStream(requestBody);
return new ServletInputStream() {
@Override
public int read() {
// 读取 requestBody 中的数据
return bais.read();
}
@Override
public boolean isFinished() {
return false;
}
@Override
public boolean isReady() {
return false;
}
@Override
public void setReadListener(ReadListener readListener) {
}
};
}
@Override
public BufferedReader getReader(){
return new BufferedReader(new InputStreamReader(getInputStream()));
}
}
- 实现另一个filter
import org.springframework.stereotype.Component;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
* @Author: huangyibo
* @Date: 2023/1/5 15:36
* @Description:
*/
@Component
public class WrapperReplacedFilterConfig implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
ServletRequest requestWrapper = null;
if (request instanceof HttpServletRequest) {
requestWrapper = new HttpServletRequestWrapperImpl((HttpServletRequest) request);
}
if (requestWrapper == null) {
chain.doFilter(request, response);
} else {
chain.doFilter(requestWrapper, response);
}
}
}
我们在上面的TestController里加入一个新的处理方法
@RequestMapping(value = "/wrapped/getPostRequestParams",method = RequestMethod.POST)
@ResponseBody
//public void getPostRequestParams(@RequestBody String params) {
public void getPostRequestParams(HttpServletRequest request) throws Exception{
byte[] bytes = IOUtils.toByteArray(request.getInputStream());
String params = new String(bytes, request.getCharacterEncoding());
log.info("controller-post请求参数:[params={}]", params);
}
这种方法里，我们在SimpleWrappedFilter里一个实现了WrappedHttpServletRequest类，其构造器自动读取了servletRequest里的输入流，并把数据保存了下来，最后又把数据重新写入servletRequest里，使得cotroller可以再次从request里读取到输入参数。
二、Interceptor
PlatformInterceptor.java
import java.util.Map;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import com.alibaba.fastjson.JSONObject;
import com.test.test.config.ConfigProperties;
import com.test.test.constants.IMsgEnum;
import com.test.test.filter.ThreadCache;
import com.test.test.resp.BaseResp;
import com.test.test.security.SignCheck;
import com.test.test.utils.DESTools;
import com.test.test.utils.JsonUtil;
import com.test.test.utils.LogUtils;
import com.test.test.utils.NetworkUtil;
import com.test.test.utils.ReflectUtil;
/**
* ClassName: PlatformInterceptor date: 2015年12月30日 下午2:13:24 Description: 拦截器
*
* @author xiaozhan
* @version
* @since JDK 1.8
*/
@Component
public class PlatformInterceptor implements HandlerInterceptor {
private static final Log logger = LogFactory.getLog(PlatformInterceptor.class);
@Autowired
private SignCheck signCheck;
@Autowired
private ConfigProperties configProperties;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
logger.info(LogUtils.getRequestLog(request));
// 获取自定义注解
String allowOrigin = null;
String servletPath = request.getServletPath();
boolean isDeprecated = false;
BaseResp baseResp = new BaseResp();
ServletOutputStream out = response.getOutputStream();
if (handler instanceof HandlerMethod) {
HandlerMethod handlerMethod = (HandlerMethod) handler;
Deprecated deprecated = handlerMethod.getMethodAnnotation(Deprecated.class);
if (deprecated != null) {
isDeprecated = true;
}
}
String method = request.getMethod();
if (!method.equals(RequestMethod.POST.name())) {
baseResp.getMsg().setRstcode(IMsgEnum.PARAM_REQUEST_METHOD_FALSE.getMsgCode());
baseResp.getMsg().setRsttext(IMsgEnum.PARAM_REQUEST_METHOD_FALSE.getMsgText());
logger.info("----- " + IMsgEnum.PARAM_REQUEST_METHOD_FALSE.getMsgText() + " -----");
out.write(JSONObject.toJSONString(baseResp).getBytes("UTF-8"));
return false;
}
String clientIp = NetworkUtil.getIpAddress(request);
logger.info("------ client Ip is ---》" + clientIp);
// 判断是否是ip白名单
if (!signCheck.checkIpAddress(clientIp)) {
baseResp.getMsg().setRstcode(IMsgEnum.PARAM_IP_ADDRESS_FALSE.getMsgCode());
baseResp.getMsg().setRsttext(IMsgEnum.PARAM_IP_ADDRESS_FALSE.getMsgText());
logger.info("----- " + IMsgEnum.PARAM_IP_ADDRESS_FALSE.getMsgText() + " -----");
out.write(JSONObject.toJSONString(baseResp).getBytes("UTF-8"));
return false;
}
// 验证签名
String params = ThreadCache.getPostRequestParams();
logger.info("interceptor-post请求参数:[params={}]" + params);
Map<String, Object> map = ReflectUtil.getDecodeParamMap(params);
String sign = (String) map.get("sign");
if (map.containsKey("sign")) {
map.remove("sign");
}
// 签名校验
if (!SignCheck.checkSign(map, sign, configProperties.getPrivateKey())) {
baseResp.getMsg().setRstcode(IMsgEnum.PARAM_SIGN_FALSE.getMsgCode());
baseResp.getMsg().setRsttext(IMsgEnum.PARAM_SIGN_FALSE.getMsgText());
logger.info("----- " + IMsgEnum.PARAM_SIGN_FALSE.getMsgText() + " -----");
out.write(JSONObject.toJSONString(baseResp).getBytes("UTF-8"));
return false;
}
try {
if (isDeprecated) {
logger.error(LogUtils.getCommLog(String.format("该接口已停止使用,%s", servletPath)));
}
} catch (Exception e) {
baseResp.getMsg().setRstcode(IMsgEnum.PARAMETER_INVALID.getMsgCode());
baseResp.getMsg().setRsttext(IMsgEnum.PARAMETER_INVALID.getMsgText());
logger.info("----- " + IMsgEnum.PARAMETER_INVALID.getMsgText() + " -----");
out.write(JSONObject.toJSONString(baseResp).getBytes("UTF-8"));
return false;
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
}
}
我这里用到拦截器的作用是对回调接口进行统一的验证签名。
回调接口都需要验证签名，而且签名规则一样，所以想拿到拦截器处理。
如果签名或者ip地址不符合条件，直接就返回了。而具体的接口只要专注业务处理，不需要验证签名了。
分享一下用的工具类:ip和签名校验：
signCheck.java
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import com.alibaba.fastjson.JSONObject;
import com.test.test.config.ConfigProperties;
import com.test.test.interceptor.PlatformInterceptor;
import com.test.test.utils.Signature;
import org.springframework.stereotype.Service;
/**
* 类说明 :校验签名和ip
*/
@Service(value="signCheck")
public class SignCheck{
private static final Log logger = LogFactory.getLog(PlatformInterceptor.class);
@Autowired
private ConfigProperties configProperties;
@Bean
public SignCheck getSignCheck(){
return new SignCheck();
}
/**
* 校验签名
* @Description:
* @author:
* @throws IllegalAccessException
* @time:2018年3月1日 上午10:38:09
*/
public static Boolean checkSign(Map params, String sign,String privateKey) throws IllegalAccessException {
if(StringUtils.isBlank(sign)) {
logger.info("*********************sign is null*********************");
return false;
}else {
String signAfter = Signature.getSign(params,privateKey);
System.out.println("sign:"+sign);
System.out.println("signAfter:"+signAfter);
if(!sign.equals(signAfter)) {
logger.info("*********************sign is not equal signAfter*********************");
return false;
}
}
return true;
}
/**
* 校验ip
* @Description:
* @author:
* @throws IllegalAccessException
* @time:2018年3月1日 上午10:38:09
*/
public Boolean checkIpAddress(String ip) throws IllegalAccessException {
String ipWhite = configProperties.getRequestUrl();
System.out.println(ipWhite);
String[] ipWhiteArray = ipWhite.split(",");
List<String> ipWhiteList = Arrays.asList(ipWhiteArray);
if(!ipWhiteList.contains(ip)) {
logger.info("*********************ip is not in ipWhiteList*********************");
return false;
}
return true;
}
}
NetworkUtil.java
获取ip地址工具类
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
/**
* 常用获取客户端信息的工具
*
*/
public final class NetworkUtil {
/**
* Logger for this class
*/
private static Logger logger = Logger.getLogger(NetworkUtil.class);
/**
* 获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址;
*
* @param request
* @return
* @throws IOException
*/
public final static String getIpAddress(HttpServletRequest request) throws IOException {
// 获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址
String ip = request.getHeader("X-Forwarded-For");
if (logger.isInfoEnabled()) {
logger.info("getIpAddress(HttpServletRequest) - X-Forwarded-For - String ip=" + ip);
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
if (logger.isInfoEnabled()) {
logger.info("getIpAddress(HttpServletRequest) - Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
if (logger.isInfoEnabled()) {
logger.info("getIpAddress(HttpServletRequest) - WL-Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
if (logger.isInfoEnabled()) {
logger.info("getIpAddress(HttpServletRequest) - HTTP_CLIENT_IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
if (logger.isInfoEnabled()) {
logger.info("getIpAddress(HttpServletRequest) - HTTP_X_FORWARDED_FOR - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
if (logger.isInfoEnabled()) {
logger.info("getIpAddress(HttpServletRequest) - getRemoteAddr - String ip=" + ip);
}
}
} else if (ip.length() > 15) {
String[] ips = ip.split(",");
for (int index = 0; index < ips.length; index++) {
String strIp = (String) ips[index];
if (!("unknown".equalsIgnoreCase(strIp))) {
ip = strIp;
break;
}
}
}
return ip;
}
}
Signature.java
加密解密工具类
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import com.alibaba.fastjson.JSONObject;
public class Signature {
/**
* 签名算法
* @param o 要参与签名的数据对象
* @return 签名
* @throws IllegalAccessException
*规则:签名,将筛选的参数按照第一个字符的键值ASCII码递增排序（字母升序排序），如果遇到相同字符则按照第二个字符的键值ASCII码递增排序，以此类推,形成key=value& * skey的字符串MD5加密; (必填)
*/
public static String getSign(Object o) throws IllegalAccessException {
ArrayList<String> list = new ArrayList<String>();
Class cls = o.getClass();
Field[] fields = cls.getDeclaredFields();
for (Field f : fields) {
f.setAccessible(true);
if (f.get(o) != null && f.get(o) != "") {
list.add(f.getName() + "=" + f.get(o) + "&");
}
}
int size = list.size();
String [] arrayToSort = list.toArray(new String[size]);
Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
StringBuilder sb = new StringBuilder();
for(int i = 0; i < size; i ++) {
sb.append(arrayToSort[i]);
}
String result = sb.toString();
System.out.println(result);
result = MD5Util.MD5Encode(result).toUpperCase();
System.out.println(result);
return result;
}
public static String getSign(Map<String,Object> map,String privateKey){
ArrayList<String> list = new ArrayList<String>();
for(Map.Entry<String,Object> entry:map.entrySet()){
if(entry.getValue()!=""){
list.add(entry.getKey() + "=" + entry.getValue() + "&");
}
}
int size = list.size();
String [] arrayToSort = list.toArray(new String[size]);
Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
StringBuilder sb = new StringBuilder();
for(int i = 0; i < size; i ++) {
sb.append(arrayToSort[i]);
}
sb.append(privateKey);
String result = sb.toString();
System.out.println(result);
result = MD5Util.MD5Encode(result).toUpperCase();
return result;
}
public static void main(String[] args) {
/*
* */
Map<String,Object> map=new HashMap();
map.put("uuid","PC0000000056");
String result= getSign(map,"aaaaa!aaa");
System.out.println(result);
map.put("sign", result);//sign
DESTools desTools = new DESTools();
String s = JSONObject.toJSONString(map);
System.out.println(s);
String param= desTools.getEncString(s);
String str= HttpUtil.doPost("http://localhost:8111/test/test", param);
System.out.println(str);
}
}
DESTools.java
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import org.apache.commons.codec.binary.Base64;
public class DESTools {
public static DESTools instance;
public static DESTools getInstace()
{
if(instance == null)
{
instance = new DESTools();
}
return instance;
}
Key key;
/**
* **
*/
private static byte[] BOSS_SECRET_KEY = { 0x0b, 0x13, (byte) 0xe7,
(byte) 0xb2, 0x51, 0x0d, 0x75, (byte) 0xc2, 0x4e, (byte) 0xdd,
(byte) 0x4b, (byte) 0x51, 0x24, 0x36, (byte) 0xa8, (byte) 0x28,
0x0b, 0x13, (byte) 0xe2, (byte) 0xb2, 0x31, 0x0d, 0x75, (byte) 0xc1 };
public DESTools() {
setKey(BOSS_SECRET_KEY);
}
/**
* 根据参数生成KEY
*/
public void setKey(byte[] strKey) {
try {
DESKeySpec dks = new DESKeySpec(BOSS_SECRET_KEY);
SecretKeyFactory keyFactory;
keyFactory = SecretKeyFactory.getInstance("DES");
this.key = keyFactory.generateSecret(dks);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing DESTOOLS class. Cause: " + e);
}
}
/**
* 加密String明文输入,String密文输出
*/
public String getEncString(String strMing) {
byte[] byteMi = null;
byte[] byteMing = null;
String strMi = "";
Base64 base64en = new Base64();
try {
byteMing = strMing.getBytes("UTF8");
byteMi = this.getEncCode(byteMing);
strMi = base64en.encodeAsString(byteMi);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing DESTOOLS class. Cause: " + e);
} finally {
base64en = null;
byteMing = null;
byteMi = null;
}
return strMi;
}
/**
* 解密 以String密文输入,String明文输出
* @param strMi
* @return
*/
public String getDesString(String strMi) {
Base64 base64De = new Base64();
byte[] byteMing = null;
byte[] byteMi = null;
String strMing = "";
try {
byteMi = base64De.decode(strMi);
byteMing = this.getDesCode(byteMi);
strMing = new String(byteMing, "UTF8");
} catch (Exception e) {
throw new RuntimeException("Error initializing DESTOOLS class. Cause: " + e);
} finally {
base64De = null;
byteMing = null;
byteMi = null;
}
return strMing;
}
/**
* 加密以byte[]明文输入,byte[]密文输出
* @param byteS
* @return
*/
private byte[] getEncCode(byte[] byteS) {
byte[] byteFina = null;
Cipher cipher;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byteFina = cipher.doFinal(byteS);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing DESTOOLS class. Cause: " + e);
} finally {
cipher = null;
}
return byteFina;
}
/**
* 解密以byte[]密文输入,以byte[]明文输出
* @param byteD
* @return
*/
private byte[] getDesCode(byte[] byteD) {
Cipher cipher;
byte[] byteFina = null;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byteFina = cipher.doFinal(byteD);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing DESTOOLS class. Cause: " + e);
} finally {
cipher = null;
}
return byteFina;
}
}
ConfigProperties.java
获取yml文件的值
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;
@Configuration
@Component
public class ConfigProperties {
@Value("${test.test.privateKey}")
private String privateKey;
@Value("${test.test.requestUrl}")
private String requestUrl;
public String getPrivateKey() {
return privateKey;
}
public void setPrivateKey(String privateKey) {
this.privateKey = privateKey;
}
public String getRequestUrl() {
return requestUrl;
}
public void setRequestUrl(String requestUrl) {
this.requestUrl = requestUrl;
}
}
yml文件如图
springboot 2.x 过滤器和拦截器 放行某个路径(静态资源)
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import xxx.xxxx.interceptor.PlatformInterceptor;
@EnableWebMvc
@Configuration
@Component
public class WebMvcConfig implements WebMvcConfigurer {
@Autowired
PlatformInterceptor passportInterceptor;
/**
* 处理拦截器 拦截路径(暂时无效)
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
// 多个拦截器组成一个拦截器链
registry.addInterceptor(passportInterceptor).addPathPatterns("/**")
.excludePathPatterns("notify","/static/**");
WebMvcConfigurer.super.addInterceptors(registry);
}
/**
* 处理过滤器 静态资源放行
*/
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
WebMvcConfigurer.super.addResourceHandlers(registry);
}
/**
* 利用fastjson替换掉jackson，且解决中文乱码问题
* @param converters
*/
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
FastJsonConfig fastJsonConfig = new FastJsonConfig();
fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
//处理中文乱码问题
List<MediaType> fastMediaTypes = new ArrayList<>();
fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
fastConverter.setSupportedMediaTypes(fastMediaTypes);
fastConverter.setFastJsonConfig(fastJsonConfig);
converters.add(fastConverter);
WebMvcConfigurer.super.configureMessageConverters(converters);
}
}
参考：
https://www.freesion.com/article/1790501924/
