java - 带引号的字符串输出

Question

我输入字符串如下

{key: IsReprint, value:COPY};{key: IsCancelled, value:CANCELLED}

我想在我的输出中将上面的字符串转换为如下所示...，想为字符串添加引号(键，值对)。

{"key": "IsReprint", "value":"COPY"};{"key": "IsCancelled", "value":"CANCELLED"}

请协助..提前致谢..

    String input="{key: IsReprint, value:COPY};{key: IsCancelled,value:CANCELLED}";
    if(input.contains("key:") && input.contains("value:") ){
        input=input.replaceAll("key", "\"key\"");       
        input=input.replaceAll("value", "\"value\"");       
        input=input.replaceAll(":", ":\""); 
        input=input.replaceAll("}", "\"}"); 
        input=input.replaceAll(",", "\","); 
        //System.out.println("OUTPUT----> "+input);
    }       

如果输入字符串如下，我上面的代码有问题

{key: BDTV, value:Africa Ltd |注册号:433323240833-C23441，GffBLAB |增值税号:4746660239035
6级

Answer 1

您可以使用正则表达式来完成相同的操作，但更简洁:

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class JsonScanner {

    private final static String JSON_REGEX = "\\{key: (.*?), value:(.*?)(\\};|\\}$)";

    /**
     * Splits the JSON string into key/value tokens.
     * 
     * @param json  the JSON string to format
     * @return  the formatted JSON string
     */
    private String findMatched(String json) {
        Pattern p = Pattern.compile(JSON_REGEX);
        Matcher m = p.matcher(json);
        StringBuilder result = new StringBuilder();

        while (m.find()) {
            result.append("\"key\"=\"" + m.group(1) + "\", ");
            result.append("\"value\"=\"" + m.group(2) + "\" ; ");
            System.out.println("m.group(1)=" + m.group(1) + " ");
            System.out.println("m.group(2)=" + m.group(2) + " ");
            System.out.println("m.group(3)=" + m.group(3) + "\n");
        }

        return result.toString();
    }

    public static void main(String... args) {
        JsonScanner jsonScanner = new JsonScanner();
        String result = jsonScanner.findMatched("{key: TVREG, value:WestAfrica Ltd | VAT No: 1009034324829/{834324}<br/>Plot No.56634773,Road};{key: REGISTRATION, value:SouthAfricaLtd | VAT No: 1009034324829/{834324}<br />Plot No. 56634773, Road}");
        System.out.println(result);
    }

}

您可能需要调整正则表达式或输出字符串以满足您的确切要求，但这应该让您了解如何开始......