关于修改前端请求原生request加锁问题

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正常情况后端获取前端的request请求：（原生已加锁，修改失效 校验）

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<em id="__mceDel">Map<String, String[]> parameterMap = req.getParameterMap();   ......   报错：错误：java.lang.IllegalStateException: No modifications are allowed to a locked ParameterMap at org.apache.catalina.util.ParameterMap.remove(ParameterMap.java)            解决办法：重新在堆里创建新的对象  Map<String,String[]> parameterMap = new HashMap<>(req.getParameterMap());           String[] superQueryArr = parameterMap.get("superQueryParams");           String[] newSuperQueryArr = new String[superQueryArr.length];           int arrSize = superQueryArr.length;           if(arrSize>0) {               int index = 0;               for (String s : superQueryArr) {                 //专门对日期类型高级查询比较进行设置（eg:审核日期大于查询日期，实际获取的应该是查询日期之前的数据）                 if ((s.contains("date") || s.contains("datetime"))) {                     if (s.contains("gt")) {                         s.replace("gt", "lt");                     } else if (s.contains("lt")) {                         s.replace("lt", "gt");                     } else if (s.contains("ge")) {                         s.replace("ge", "le");                     } else if (s.contains("le")) {                         s.replace("le", "ge");                     }                 }                 newSuperQueryArr[index++] = s;             }         }             parameterMap.put("superQueryParams",newSuperQueryArr); </em>