Question

我输入了字符串，如下所示

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

我想在输出中将以上字符串转换为如下...，想要在字符串中添加引号（键，值对）。

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

请提前帮助..谢谢..

    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);
    }

如果输入字符串如上所示，上面的代码有问题

{key：BDTV，价值：非洲有限公司|注册号：433323240833-C23441，GffBLAB |增值税号：4746660239035
等级6}

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......

Answer 2

You have to escape characters

How do I escape a string in Java?

例如：
String s =＆＃34; {\＆＃34; key \＆＃34;：\＆＃34; IsReprint \＆＃34;＆＃34 ;; //将打印为{＆＃34; key＆＃34;：＆＃34; IsReprint＆＃34;

Answer 3

双引号字符必须使用Java字符串文字中的反斜杠进行转义。其他需要特殊处理的角色包括：

回车和换行：“\ r”和“\ n” 反斜杠：“\” 单引号：“\'” 水平制表符和换页符：“\ t”和“\ f”。

Answer 4

这可以提供您想要的确切结果！

{
  "consul": [],
  "redis": [],
  "postgresql": [
    "primary",
    "secondary"
  ]
}

Answer 5

这是一个使用正则表达式将输入拆分为键/值对，然后使用您希望的格式聚合结果的解决方案：

// Split key value pairs
final String regexp = "\\{(.*?)\\}";
final Pattern p = Pattern.compile(regexp);
final Matcher m = p.matcher(input);
final List<String[]> keyValuePairs = new ArrayList<>();
while (m.find())
{
    final String[] keyValue = input.substring(m.start() + 1, m.end() - 1) // "key: IsReprint, value:COPY"
        .substring(5) // "IsReprint, value:COPY"
        .split(", value:"); // ["IsReprint", "COPY"]
    keyValuePairs.add(keyValue);
}

// Aggregate
final List<String> newKeyValuePairs = keyValuePairs.stream().map(keyValue ->
{
    return "{\"key\": \"" + keyValue[0] + "\", \"value\":\"" + keyValue[1] + "\"}";
}).collect(Collectors.toList());

System.out.println(StringUtils.join(newKeyValuePairs.toArray(), ";"));

以下输入字符串的结果

final String input = "{key: IsReprint, value:COPY};{key: IsCancelled, value:CANCELLED};{key: BDTV, value:Africa Ltd | Reg No: 433323240833-C23441,GffBLAB | VAT No: 4746660239035<br />Level 6}";

是{"key": "IsReprint", "value":"COPY"};{"key": "IsCancelled", "value":"CANCELLED"};{"key": "BDTV", "value":"Africa Ltd | Reg No: 433323240833-C23441,GffBLAB | VAT No: 4746660239035<br />Level 6"}

Answer 6

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

public class NewClass {
    public static void main(String[] args) {
        String input="{key: IsReprint, value:COPY};{key: IsCancelled, value:CANCELLED};{key: BDTV,value:Africa Ltd | Reg No: 433323240833-C23441,GffBLAB | VAT No: 4746660239035 Level 6}";
        Matcher m1 = Pattern.compile("key:" + "(.*?)" + ",\\s*value:").matcher(input);
        Matcher m2 = Pattern.compile("value:" + "(.*?)" + "}").matcher(input);
        StringBuilder sb = new StringBuilder();
        while(m1.find() && m2.find()){
              sb.append("{\"key\": ")
                .append("\"")
                .append(m1.group(1).trim())
                .append("\", \"value\":")
                .append("\"")
                .append(m2.group(1).trim())
                .append("\"};");
        }
        String output = sb.deleteCharAt(sb.length()-1).toString();
        System.out.println(output);
    }    
}

带引号

6 个答案: