SpringBoot：基于redis自定义注解实现后端接口防重复提交校验
SpringBoot：基于redis自定义注解实现后端接口防重复提交校验
一、添加依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-redis</artifactId>
<version>1.4.4.RELEASE</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>3.6.3</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.75</version>
</dependency>二、代码实现
1.构建可重复读取inputStream的request
package com.hl.springbootrepetitionsubmit.servlet;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.nio.charset.StandardCharsets;
/**
* 构建可重复读取inputStream的request
*/
public class RepeatedlyRequestWrapper extends HttpServletRequestWrapper {
private final String body;
public RepeatedlyRequestWrapper(HttpServletRequest request, ServletResponse response) throws IOException {
super(request);
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
body = getBodyString(request);
}
@Override
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(getInputStream()));
}
public String getBody() {
return body;
}
@Override
public ServletInputStream getInputStream() throws IOException {
final ByteArrayInputStream bais = new ByteArrayInputStream(body.getBytes(StandardCharsets.UTF_8));
return new ServletInputStream() {
@Override
public int read() throws IOException {
return bais.read();
}
@Override
public int available() throws IOException {
return body.length();
}
@Override
public boolean isFinished() {
return false;
}
@Override
public boolean isReady() {
return false;
}
@Override
public void setReadListener(ReadListener readListener) {
}
};
}
/**
* 获取Request请求body内容
*
* @param request
* @return
*/
private String getBodyString(ServletRequest request) {
StringBuilder sb = new StringBuilder();
BufferedReader reader = null;
try (InputStream inputStream = request.getInputStream()) {
reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
String line = "";
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return sb.toString();
}
}2.重写request
package com.hl.springbootrepetitionsubmit.filter;
import com.hl.springbootrepetitionsubmit.servlet.RepeatedlyRequestWrapper;
import org.springframework.http.MediaType;
import org.springframework.util.StringUtils;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
* 过滤器（重写request）
*/
public class RepeatableFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
ServletRequest requestWrapper = null;
//将原生的request变为可重复读取inputStream的request
if (request instanceof HttpServletRequest
&& StringUtils.startsWithIgnoreCase(request.getContentType(), MediaType.APPLICATION_JSON_VALUE)) {
requestWrapper = new RepeatedlyRequestWrapper((HttpServletRequest) request, response);
}
if (null == requestWrapper) {
chain.doFilter(request, response);
} else {
chain.doFilter(requestWrapper, response);
}
}
}3.自定义注解
/**
* 自定义注解防止表单重复提交
*/
@Inherited
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface RepeatSubmit {
}4.创建防止重复提交拦截器
package com.hl.springbootrepetitionsubmit.interceptor;
import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSONObject;
import com.hl.springbootrepetitionsubmit.annotation.RepeatSubmit;
import com.hl.springbootrepetitionsubmit.config.RedisUtil;
import com.hl.springbootrepetitionsubmit.servlet.RepeatedlyRequestWrapper;
import org.springframework.beans.factory.annotation.*;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.*;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.*;
import java.util.concurrent.TimeUnit;
/**
* 防止重复提交拦截器
*/
@Component
public class RepeatSubmitInterceptor implements HandlerInterceptor {
public final String REPEAT_PARAMS = "repeatParams";
public final String REPEAT_TIME = "repeatTime";
/**
* 防重提交 redis key
*/
public final String REPEAT_SUBMIT_KEY = "repeat_submit:";
// 令牌自定义标识
@Value("${token.header}")
private String header;
@Autowired
private RedisUtil redisUtil;
/**
* 间隔时间，单位:秒
* <p>
* 两次相同参数的请求，如果间隔时间大于该参数，系统不会认定为重复提交的数据
*/
@Value("${repeatSubmit.intervalTime}")
private int intervalTime;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
if (handler instanceof HandlerMethod) {
HandlerMethod handlerMethod = (HandlerMethod) handler;
Method method = handlerMethod.getMethod();
RepeatSubmit annotation = method.getAnnotation(RepeatSubmit.class);
if (annotation != null) {
if (this.isRepeatSubmit(request)) {
//返回重复提交提示
Map<String, Object> resultMap = new HashMap<>();
resultMap.put("code", "500");
resultMap.put("msg", request.getRequestURI() + "不允许重复提交，请稍后再试");
try {
response.setStatus(200);
response.setContentType("application/json");
response.setCharacterEncoding("utf-8");
response.getWriter().print(JSONObject.toJSONString(resultMap));
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
}
return true;
} else {
return preHandle(request, response, handler);
}
}
/**
* 验证是否重复提交由子类实现具体的防重复提交的规则
*/
public boolean isRepeatSubmit(HttpServletRequest request) {
String nowParams = "";
if (request instanceof RepeatedlyRequestWrapper) {
RepeatedlyRequestWrapper repeatedlyRequest = (RepeatedlyRequestWrapper) request;
nowParams = repeatedlyRequest.getBody();
}
// body参数为空，获取Parameter的数据
if (StrUtil.isBlank(nowParams)) {
nowParams = JSONObject.toJSONString(request.getParameterMap());
}
Map<String, Object> nowDataMap = new HashMap<String, Object>();
nowDataMap.put(REPEAT_PARAMS, nowParams);
nowDataMap.put(REPEAT_TIME, System.currentTimeMillis());
// 请求地址（作为存放cache的key值）
String url = request.getRequestURI();
// 唯一值（没有消息头则使用请求地址）
String submitKey = request.getHeader(header);
if (StrUtil.isBlank(submitKey)) {
submitKey = url;
}
// 唯一标识（指定key + 消息头）
String cacheRepeatKey = REPEAT_SUBMIT_KEY + submitKey;
Object sessionObj = redisUtil.getCacheObject(cacheRepeatKey);
if (sessionObj != null) {
Map<String, Object> sessionMap = (Map<String, Object>) sessionObj;
if (sessionMap.containsKey(url)) {
Map<String, Object> preDataMap = (Map<String, Object>) sessionMap.get(url);
if (compareParams(nowDataMap, preDataMap) && compareTime(nowDataMap, preDataMap)) {
return true;
}
}
}
Map<String, Object> cacheMap = new HashMap<String, Object>();
cacheMap.put(url, nowDataMap);
redisUtil.setCacheObject(cacheRepeatKey, cacheMap, intervalTime, TimeUnit.SECONDS);
return false;
}
/**
* 判断参数是否相同
*/
private boolean compareParams(Map<String, Object> nowMap, Map<String, Object> preMap) {
String nowParams = (String) nowMap.get(REPEAT_PARAMS);
String preParams = (String) preMap.get(REPEAT_PARAMS);
return nowParams.equals(preParams);
}
/**
* 判断两次间隔时间
*/
private boolean compareTime(Map<String, Object> nowMap, Map<String, Object> preMap) {
long time1 = (Long) nowMap.get(REPEAT_TIME);
long time2 = (Long) preMap.get(REPEAT_TIME);
if ((time1 - time2) < (this.intervalTime * 1000L)) {
return true;
}
return false;
}
}5.redis配置
package com.hl.springbootrepetitionsubmit.config;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import java.time.Duration;
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
//配置redis的过期时间
private static final Duration TIME_TO_LIVE = Duration.ZERO;
@Bean(name = "jedisPoolConfig")
public JedisPoolConfig jedisPoolConfig() {
JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
//控制一个pool可分配多少个jedis实例
jedisPoolConfig.setMaxTotal(500);
//最大空闲数
jedisPoolConfig.setMaxIdle(200);
//每次释放连接的最大数目，默认是3
jedisPoolConfig.setNumTestsPerEvictionRun(1024);
//逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1
jedisPoolConfig.setTimeBetweenEvictionRunsMillis(30000);
//连接的最小空闲时间 默认1800000毫秒(30分钟)
jedisPoolConfig.setMinEvictableIdleTimeMillis(-1);
jedisPoolConfig.setSoftMinEvictableIdleTimeMillis(10000);
//最大建立连接等待时间。如果超过此时间将接到异常。设为-1表示无限制。
jedisPoolConfig.setMaxWaitMillis(1500);
jedisPoolConfig.setTestOnBorrow(true);
jedisPoolConfig.setTestWhileIdle(true);
jedisPoolConfig.setTestOnReturn(false);
jedisPoolConfig.setJmxEnabled(true);
jedisPoolConfig.setBlockWhenExhausted(false);
return jedisPoolConfig;
}
@Bean("connectionFactory")
public JedisConnectionFactory connectionFactory() {
RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
redisStandaloneConfiguration.setHostName("127.0.0.1");
redisStandaloneConfiguration.setDatabase(0);
// redisStandaloneConfiguration.setPassword(RedisPassword.of("123456"));
redisStandaloneConfiguration.setPort(6379);
//获得默认的连接池构造器
JedisClientConfiguration.JedisPoolingClientConfigurationBuilder jpcb =
(JedisClientConfiguration.JedisPoolingClientConfigurationBuilder) JedisClientConfiguration.builder();
//指定jedisPoolConifig来修改默认的连接池构造器（真麻烦，滥用设计模式！）
jpcb.poolConfig(jedisPoolConfig());
//通过构造器来构造jedis客户端配置
JedisClientConfiguration jedisClientConfiguration = jpcb.build();
//单机配置 + 客户端配置 = jedis连接工厂
return new JedisConnectionFactory(redisStandaloneConfiguration, jedisClientConfiguration);
}
@Bean("jedisPool")
public JedisPool jedisPool(){
return new JedisPool(jedisPoolConfig(),"127.0.0.1",6379);
}
@Bean
public RedisTemplate<Object, Object> redisTemplate(JedisConnectionFactory connectionFactory) {
RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(connectionFactory);
GenericJackson2JsonRedisSerializer jackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
//初始化参数和初始化工作
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
/**
* 缓存对象集合中，缓存是以key-value形式保存的,
* 当不指定缓存的key时，SpringBoot会使用keyGenerator生成Key。
*/
@Override
@Bean
public KeyGenerator keyGenerator() {
return (target, method, params) -> {
StringBuilder sb = new StringBuilder();
//类名+方法名
sb.append(target.getClass().getName());
sb.append(method.getName());
for (Object obj : params) {
sb.append(obj.toString());
}
return sb.toString();
};
}
/**
* 缓存管理器
* @param connectionFactory 连接工厂
* @return cacheManager
*/
@Bean
public CacheManager cacheManager(JedisConnectionFactory connectionFactory) {
//新建一个Jackson2JsonRedis的redis存储的序列化方式
GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();
//解决查询缓存转换异常的问题
// 配置序列化（解决乱码的问题）
//entryTtl设置过期时间
//serializeValuesWith设置redis存储的序列化方式
RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(TIME_TO_LIVE)
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(genericJackson2JsonRedisSerializer))
.disableCachingNullValues();
//定义要返回的redis缓存管理对象
return RedisCacheManager.builder(connectionFactory).cacheDefaults(config).build();
}
}6.redis工具类
package com.hl.springbootrepetitionsubmit.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import java.util.*;
import java.util.concurrent.TimeUnit;
@Component
public class RedisUtil {
@Autowired
private RedisTemplate redisTemplate;
/**
* 缓存基本的对象，Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
*/
public <T> void setCacheObject(final String key, final T value) {
redisTemplate.opsForValue().set(key, value);
}
/**
* 缓存基本的对象，Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
* @param timeout 时间
* @param timeUnit 时间颗粒度
*/
public <T> void setCacheObject(final String key, final T value, final Integer timeout, final TimeUnit timeUnit) {
redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @return true=设置成功；false=设置失败
*/
public boolean expire(final String key, final long timeout) {
return expire(key, timeout, TimeUnit.SECONDS);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @param unit 时间单位
* @return true=设置成功；false=设置失败
*/
public boolean expire(final String key, final long timeout, final TimeUnit unit) {
return redisTemplate.expire(key, timeout, unit);
}
/**
* 获得缓存的基本对象。
*
* @param key 缓存键值
* @return 缓存键值对应的数据
*/
public <T> T getCacheObject(final String key) {
ValueOperations<String, T> operation = redisTemplate.opsForValue();
return operation.get(key);
}
/**
* 删除单个对象
*
* @param key
*/
public boolean deleteObject(final String key) {
return redisTemplate.delete(key);
}
/**
* 删除集合对象
*
* @param collection 多个对象
* @return
*/
public long deleteObject(final Collection collection) {
return redisTemplate.delete(collection);
}
/**
* 缓存List数据
*
* @param key 缓存的键值
* @param dataList 待缓存的List数据
* @return 缓存的对象
*/
public <T> long setCacheList(final String key, final List<T> dataList) {
Long count = redisTemplate.opsForList().rightPushAll(key, dataList);
return count == null ? 0 : count;
}
/**
* 获得缓存的list对象
*
* @param key 缓存的键值
* @return 缓存键值对应的数据
*/
public <T> List<T> getCacheList(final String key) {
return redisTemplate.opsForList().range(key, 0, -1);
}
/**
* 缓存Set
*
* @param key 缓存键值
* @param dataSet 缓存的数据
* @return 缓存数据的对象
*/
public <T> BoundSetOperations<String, T> setCacheSet(final String key, final Set<T> dataSet) {
BoundSetOperations<String, T> setOperation = redisTemplate.boundSetOps(key);
Iterator<T> it = dataSet.iterator();
while (it.hasNext()) {
setOperation.add(it.next());
}
return setOperation;
}
/**
* 获得缓存的set
*
* @param key
* @return
*/
public <T> Set<T> getCacheSet(final String key) {
return redisTemplate.opsForSet().members(key);
}
/**
* 缓存Map
*
* @param key
* @param dataMap
*/
public <T> void setCacheMap(final String key, final Map<String, T> dataMap) {
if (dataMap != null) {
redisTemplate.opsForHash().putAll(key, dataMap);
}
}
/**
* 获得缓存的Map
*
* @param key
* @return
*/
public <T> Map<String, T> getCacheMap(final String key) {
return redisTemplate.opsForHash().entries(key);
}
/**
* 往Hash中存入数据
*
* @param key Redis键
* @param hKey Hash键
* @param value 值
*/
public <T> void setCacheMapValue(final String key, final String hKey, final T value) {
redisTemplate.opsForHash().put(key, hKey, value);
}
/**
* 获取Hash中的数据
*
* @param key Redis键
* @param hKey Hash键
* @return Hash中的对象
*/
public <T> T getCacheMapValue(final String key, final String hKey) {
HashOperations<String, String, T> opsForHash = redisTemplate.opsForHash();
return opsForHash.get(key, hKey);
}
/**
* 获取多个Hash中的数据
*
* @param key Redis键
* @param hKeys Hash键集合
* @return Hash对象集合
*/
public <T> List<T> getMultiCacheMapValue(final String key, final Collection<Object> hKeys) {
return redisTemplate.opsForHash().multiGet(key, hKeys);
}
/**
* 获得缓存的基本对象列表
*
* @param pattern 字符串前缀
* @return 对象列表
*/
public Collection<String> keys(final String pattern) {
return redisTemplate.keys(pattern);
}
}7.配置拦截器
/**
* 防重复提交配置
*/
@Configuration
public class RepeatSubmitConfig implements WebMvcConfigurer {
@Autowired
private RepeatSubmitInterceptor repeatSubmitInterceptor;
/**
* 添加防重复提交拦截
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(repeatSubmitInterceptor).addPathPatterns("/**");
}
/**
* 生成防重复提交过滤器（重写request）
* @return FilterRegistrationBean
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
@Bean
public FilterRegistrationBean<?> createRepeatableFilter() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new RepeatableFilter());
registration.addUrlPatterns("/*");
registration.setName("repeatableFilter");
registration.setOrder(FilterRegistrationBean.LOWEST_PRECEDENCE);
return registration;
}
}8.controller
@RestController
@RequestMapping("/repeatSubmit")
public class RepeatSubmitController {
/**
* 保存Param
* @param name
* @return
*/
@RepeatSubmit
@PostMapping("/saveParam/{name}")
public String saveParam(@PathVariable("name")String name){
return "保存Param成功";
}
/**
* 保存Param
* @param name
* @return
*/
@RepeatSubmit
@PostMapping("/saveBody")
public String saveBody(@RequestBody List<String> name){
return "保存Body成功";
}
}三、测试
param传参：
body传参：
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原文链接 : https://blog.csdn.net/weixin_43296313/article/details/122626305
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