regex java模式从mapper生成的字符串中清除其他字符周围的引号

Question

我需要将json映射器生成的字符串序列替换为fallow：

:"{ -> :{   
}"} -> }} 

你会怎么看呢

更新：完整字符串示例

{"method":"createInvoice","params":"{"btcDue":null,"btcPaid":null,
                        "btcPrice":null,"currency":"PLN","currentTime":null,
                        "exceptionStatus":null,"expirationTime":null,
                        "guid":"99250130","id":null,"invoiceTime":null,
                        "paymentUrls":null,"price":1.23,"rate":null,
                        "status":null,"transactions":null,"url":null
}"} 

但假设我们将有更多实例需要替换，比如2:）

澄清：安卓字符串方法

 public String replace(CharSequence target, CharSequence replacement) {
    String replacementStr = replacement.toString();
    String targetStr = target.toString();
    // Special case when target == "". 
    // .. cut 
    // This is the "regular" case.
    int lastMatch = 0;
    StringBuilder sb = null;
    for (;;) {
        int currentMatch = indexOf(this, targetStr, lastMatch);
        if (currentMatch == -1) {
            break;
        }
        if (sb == null) {
            sb = new StringBuilder(count);
        }
        sb.append(this, lastMatch, currentMatch);
        sb.append(replacementStr);
        lastMatch = currentMatch + targetStr.count;
    }

    if (sb != null) {
        sb.append(this, lastMatch, count);
        return sb.toString();
    } else {
        return this;
    }
 }

 public String replaceAll(String regex, String replacement) {
    return Pattern.compile(regex).matcher(this).replaceAll(replacement);
}

Answer 1

您可以使用lookahead/lookbehind结构匹配:+{和}+}包围的所有引号：

(?<=})"(?=})|(?<=:)"(?={)

将此消息传递给replaceAll以删除引号（demo）

Answer 2

没什么难事：

String result = "{\"method\":\"createInvoice\",\"params\":\"{\"btcDue\":null,\"btcPaid\":null,\"btcPrice\":null,\"currency\":\"PLN\",\"currentTime\":null,\"exceptionStatus\":null,\"expirationTime\":null,\"guid\":\"99250130\",\"id\":null,\"invoiceTime\":null,\"paymentUrls\":null,\"price\":1.23,\"rate\":null,\"status\":null,\"transactions\":null,\"url\":null}\"}"
    .replace(":\"{", ":{")
    .replace("}\"}", "}}");
System.out.println(result);

Answer 3

按搜索

\"

然后将其替换为“

原文

:"{   
}"}

结果

:{
}}

JAVA代码

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

final String regex = "\\\"";
final String string = ":\"{ -> :{   \n"
     + "}\"} -> }} ";
final String subst = "";

final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);

// The substituted value will be contained in the result variable
final String result = matcher.replaceAll(subst);

System.out.println("Substitution result: " + result);