0

我有一个字符串：

str="{\"type\":\"Polygon\",\"coordinates\":[[[60.677938980978993,56.834449959232998],
[60.680103564162927,56.834305549577387],[60.679971577383398,56.833005837614643],
[60.679813193248009,56.832846980836457],[60.678546120164683,56.832760331400671],
[60.678229351893869,56.831850500219574],[60.677622212708137,56.831893826015182],
[60.676830292031028,56.832139337910085],[60.67624955020122,56.832818097713471],
[60.676275947556981,56.833655699235088],[60.676328742268893,56.834724336044253],
[60.677411033860842,56.834695454369324],[60.677490225928629,56.834478841097273],
[60.677938980978993,56.834449959232998]]]}"

现在我想删除所有\：

str.replaceAll("\\","");

并得到错误：

java.util.regex.PatternSyntaxException: Unexpected internal error near index 1
\

好吧，我说。另一个希望删除第一个和最后一个引号：

str.substring(str.indexOf("\""),str.lastIndexOf("\""));

我得到一个字符串：

"{\"type\":\"Polygon\",\"coordinates\":[[[60.677938980978993,56.834449959232998],
[60.680103564162927,56.834305549577387],[60.679971577383398,56.833005837614643],
[60.679813193248009,56.832846980836457],[60.678546120164683,56.832760331400671],
[60.678229351893869,56.831850500219574],[60.677622212708137,56.831893826015182],
[60.676830292031028,56.832139337910085],[60.67624955020122,56.832818097713471],
[60.676275947556981,56.833655699235088],[60.676328742268893,56.834724336044253],
[60.677411033860842,56.834695454369324],[60.677490225928629,56.834478841097273],
[60.677938980978993,56.834449959232998]]]"

只有最后一个}被删除。

我在这段代码片段中做错了什么？

4

4 回答 4

3

你试过str.replaceAll("\\\\","");吗？（见https://stackoverflow.com/a/3640386/500478）

于 2013-01-22T11:02:36.990 回答
1

使用其中之一，

str.replaceAll("\\.", "");

或者 

 str.replaceAll("\\\\", "");

当您键入 时"\\"，这实际上是一个反斜杠（由于转义 Java 字符串中的特殊字符）。

正则表达式也使用反斜杠作为特殊字符，您需要使用另一个反斜杠或使用 a 对其进行转义，DOT(.)所以最后，您需要传递"\\\\"or "\\."作为模式来匹配单个反斜杠。

于 2013-01-22T11:04:54.243 回答
1 
       System.out.println(str.replaceAll("\\\\", ""));

输出：

{ “类型”： “多边形”， “坐标”：[[[60.677938980978993,56.834449959232998]，[60.680103564162927,56.834305549577387]，[60.679971577383398,56.833005837614643]，[60.679813193248009,56.832846980836457]，[60.678546120164683,56.832760331400671]，
[60.678229351893869,56.831850500219574] [60.677622212708137,56.831893826015182]，
[60.676830292031028,56.832139337910085]，[60.67624955020122,56.832818097713471]，
[60.676275947556981,56.833655699235088]，[60.676328742268893,56.834724336044253]，[60.677411033860842,56.834695454369324]，[60.677490225928629,56.834478841097273]，[60.677938980978993,56.834449959232998]]] }

于 2013-01-22T11:05:04.853 回答
1 
str.replace("\\", "");

适用于您的情况。

public String replace(CharSequence target,CharSequence replacement)

用指定的文字替换序列替换 此字符串中与文字目标序列匹配的每个子字符串。

String s = "abc" + "\\" + "def";
System.out.println(s);

它打印出以下内容 -

abc\def

\ 是字符串和正则表达式中的转义字符。

于 2013-01-22T11:07:17.840 回答