Spring中处理JSON请求通常使用@RequestBody和@ResponseBody注解，针对JSON请求加解密和过滤字符串，Spring提供了RequestBodyAdvice和ResponseBodyAdvice两个接口
具体使用
1、解密：
import com.hive.util.AESOperator;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.RequestBodyAdvice;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
/**
* 请求数据解密
*/
@ControllerAdvice(basePackages = "com.hive")
public class MyRequestBodyAdvice implements RequestBodyAdvice {
private final static Logger logger = LoggerFactory.getLogger(MyResponseBodyAdvice.class);
@Override
public boolean supports(MethodParameter methodParameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {
return true;
}
@Override
public Object handleEmptyBody(Object body, HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {
return body;
}
@Override
public HttpInputMessage beforeBodyRead(HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) throws IOException {
try {
return new MyHttpInputMessage(inputMessage);
} catch (Exception e) {
e.printStackTrace();
return inputMessage;
}
}
@Override
public Object afterBodyRead(Object body, HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {
return body;
}
class MyHttpInputMessage implements HttpInputMessage {
private HttpHeaders headers;
private InputStream body;
public MyHttpInputMessage(HttpInputMessage inputMessage) throws Exception {
this.headers = inputMessage.getHeaders();
this.body = IOUtils.toInputStream(AESOperator.getInstance().decrypt(IOUtils.toString(inputMessage.getBody(), "UTF-8")), "UTF-8");
}
@Override
public InputStream getBody() throws IOException {
return body;
}
@Override
public HttpHeaders getHeaders() {
return headers;
}
}
}2、加密：
package com.hive.core.json;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.hive.util.AESOperator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
/**
* 返回数据加密
*/
@ControllerAdvice(basePackages = "com.hive")
public class MyResponseBodyAdvice implements ResponseBodyAdvice {
private final static Logger logger = LoggerFactory.getLogger(MyResponseBodyAdvice.class);
private final static String KEY = "!QA2Z@w1sxO*(-8L";
@Override
public boolean supports(MethodParameter returnType, Class converterType) {
return true;
}
@Override
public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
boolean encode = false;
if (returnType.getMethod().isAnnotationPresent(SerializedField.class)) {
//获取注解配置的包含和去除字段
SerializedField serializedField = returnType.getMethodAnnotation(SerializedField.class);
//是否加密
encode = serializedField.encode();
}
if (encode) {
logger.info("对方法method :" + returnType.getMethod().getName() + "返回数据进行加密");
ObjectMapper objectMapper = new ObjectMapper();
try {
String result = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(body);
return AESOperator.getInstance().encrypt(result);
} catch (JsonProcessingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
return body;
}
}
注解类：
package com.hive.core.json;
import org.springframework.web.bind.annotation.Mapping;
import java.lang.annotation.*;
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Mapping
public @interface SerializedField {
/**
* 是否加密
* @return
*/
boolean encode() default true;
}
}
默认是true，我这边使用false。注解类中还可以定义需要过滤的字符串
AES加密类
package com.hive.util;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
/**
* AES CBC加密
*/
public class AESOperator {
/*
* 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。
*/
private String KEY = "!QA2Z@w1sxO*(-8L";
private String VECTOR = "!WFNZFU_{H%M(S|a";
private static AESOperator instance = null;
private AESOperator() {
}
public static AESOperator getInstance() {
return Nested.instance;
}
//于内部静态类只会被加载一次，故该实现方式时线程安全的！
static class Nested {
private static AESOperator instance = new AESOperator();
}
/**
* 加密
*
* @param content
* @return
* @throws Exception
*/
public String encrypt(String content) throws Exception {
return encrypt(content, KEY, VECTOR);
}
/**
* 加密
*
* @param content
* @return
* @throws Exception
*/
public String encrypt(String content,String key) throws Exception {
return encrypt(content, key, VECTOR);
}
/**
* 加密
*
* @param content
* @param key
* @param vector
* @return
* @throws Exception
*/
public String encrypt(String content, String key, String vector) throws Exception {
if (key == null) {
return null;
}
if (key.length() != 16) {
return null;
}
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
IvParameterSpec iv = new IvParameterSpec(vector.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(content.getBytes("UTF-8"));
return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。
}
/**
* 解密
*
* @param content
* @return
* @throws Exception
*/
public String decrypt(String content) throws Exception {
return decrypt(content, KEY, VECTOR);
}
/**
* 解密
*
* @param content
* @return
* @throws Exception
*/
public String decrypt(String content,String key) throws Exception {
return decrypt(content, key, VECTOR);
}
/**
* 解密
*
* @param content
* @param key
* @param vector
* @return
* @throws Exception
*/
public String decrypt(String content, String key, String vector) throws Exception {
try {
if (key == null) {
return null;
}
if (key.length() != 16) {
return null;
}
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
IvParameterSpec iv = new IvParameterSpec(vector.getBytes());
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = new BASE64Decoder().decodeBuffer(content);// 先用base64解密
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original, "UTF-8");
return originalString;
} catch (Exception ex) {
return null;
}
}
public static void main(String[] args) throws Exception {
// 需要加密的字串
String cSrc = "我爱你";
// 加密
long lStart = System.currentTimeMillis();
String enString = AESOperator.getInstance().encrypt(cSrc,"!QA2Z@w1sxO*(-8L");
System.out.println("加密后的字串是：" + enString);
long lUseTime = System.currentTimeMillis() - lStart;
System.out.println("加密耗时：" + lUseTime + "毫秒");
// 解密
lStart = System.currentTimeMillis();
String DeString = AESOperator.getInstance().decrypt(enString);
System.out.println("解密后的字串是：" + DeString);
lUseTime = System.currentTimeMillis() - lStart;
System.out.println("解密耗时：" + lUseTime + "毫秒");
}
}