摘要：//求类型为1的总和SUM( CASE a.problemType WHEN 1 THEN 1 ELSE 0 END ) case 字段 when 条件 then 值1 else 值2 end 语句 阅读全文

摘要：public String demo(HttpServletRequest request,String carnum) //转码 String test1 = URLEncoder.encode(carnum,"UTF-8") //解码 String test2 = URLDecoder.deco 阅读全文

摘要：//get请求方式 private String getInfo(Map<String, Object> params,String URL) { // 创建Httpclient对象 CloseableHttpClient httpclient = HttpClients.createDefault 阅读全文

摘要：public Map<String, String> fileUpload(HttpServletRequest request, User user) throws IOException { String uploadBasePath = UploadConstant.FILE_UPLOAD_B 阅读全文