java - 使用 Java 拆分复杂的 String 对象并将值填充到 DTO 中

Question

我有一个复杂的字符串，需要分别用分隔符“&”和“=”将其分割两次。然后我需要在Java POJO类中设置值。我需要为pojo中的requestTimestamp字段设置2020-08-11+15%3A11%3A49之类的值，在channelResponseCode中设置0036.....对于所有字段都是如此。由于每个字段的所有值都被设置。请帮忙。 我的代码如下:

public static void main(String[] args) {
        
        String strMain = "request_timestamp=2020-08-11+15%3A11%3A49&channel_response_code=0036&channel_response_desc=Payment+is+cancelled.&sub_merchant_list=";
        String arrSplit[] = strMain.split("&");
        // [request_timestamp=2020-08-11+15%3A11%3A49, channel_response_code=0036, channel_response_desc=Payment+is+cancelled.,_4=, user_defined_5=, .....]
        //  System.out.println(Arrays.toString(arrSplit));            
        Payment p = new Payment();
        for (String s : arrSplit) {
            String[] t =s.split("=");
        System.out.println(Arrays.toString(t));
      if(t.length >1) {
      p.setRequest_timestamp(t[1]); 
      }
      else { p.setRequest_timestamp(""); }
     
            System.out.println("Hiii"+p.getRequest_timestamp());
      }
    }

Answer 1

您可以使用 StringTokenizer 来实现此目的。

       private static final String CHANEL_RESPONSE_CODE = "channel_response_code";
private static final String CHANEL_RESPONSE_DESC = "channel_response_desc";
private static final String REQUEST_TIME_STMP = "request_timestamp";
private static final String MERCHANT_LIST = "sub_merchant_list";

public static void main(String[] args) {

    String strMain = "request_timestamp=2020-08-11+15%3A11%3A49&channel_response_code=0036&channel_response_desc=Payment+is+cancelled.&sub_merchant_list=";


    StringTokenizer tokenizer = new StringTokenizer(strMain, "&");



    while (tokenizer.hasMoreElements()){
           String element = tokenizer.nextElement().toString();
           if(element.contains(CHANEL_RESPONSE_CODE)){
               String chanelReponseCodeValue[] = element.split("=");
               if(chanelReponseCodeValue.length>=2){
                   System.out.println(chanelReponseCodeValue[1]);
               }
              
           }
           if(element.contains(CHANEL_RESPONSE_DESC)){
               String chanelReponseDescValue[] = element.split("=");
               if(chanelReponseDescValue.length>=2) {
                   System.out.println(chanelReponseDescValue[1]);
               }
           }
           if(element.contains(REQUEST_TIME_STMP)){
               String  requestTimeStmp[] = element.split("=");
               if(requestTimeStmp.length>=2){
                   System.out.println(requestTimeStmp[1]);
               }

           }
           if(element.contains(MERCHANT_LIST)){
               String  merchantList[] = element.split("=");
               if(merchantList.length>=2) {
                   System.out.println(merchantList[1]);
               }
           }

    }

}