如何在Java中用引号替换子字符串？

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]]]}"

"{\"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("\\",""); 

和获取错误：

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

好的，我说。另一个愿望是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：

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]]]}"

"{\"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]]]"

只删除了最后一个

}

---

我在这段代码中做错了什么？

您是否尝试过

str.replaceAll（“\\\\”，”）？
（请参阅）
您是否尝试过
str.replaceAll（“\\\\”，”）？
（请参阅）
使用其中一种

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

或

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
点（.
来转义它。因此，最后，您需要将
“\\\\”
或
“\\\。”
作为模式来匹配单个反斜杠。
使用其中一个

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

       System.out.println(str.replaceAll("\\\\", ""));

或

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
点（.
来转义它，所以最后，您需要将
“\\\\”
或
“\\\\。”
作为模式来匹配单个反斜杠

       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]，[60.67749022592629,56.834478841097273]，[60.677938980978993,56.834449959232998]]

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]，[60.67749022592629,56.834478841097273]，[60.677938980978993,56.834449959232998]]

对你的案子很好

public String replace(CharSequence target,CharSequence replacement)

取代
此字符串的子字符串，该字符串将文字目标序列与指定的文字替换序列相匹配

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

它会打印出以下内容-

abc\def

\是字符串和正则表达式中的转义字符

对你的案子很好

public String replace(CharSequence target,CharSequence replacement)

取代
此字符串的子字符串，该字符串将文字目标序列与指定的文字替换序列相匹配

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

它会打印出以下内容-

abc\def

\是字符串和正则表达式中的转义字符
 我认为\\\\->\\因为它没有帮助。你能提供一段源代码吗？使用您的示例，我不知道您的字符串是否真的包含反斜杠，或者它们是否用于转义Java字符串中的引号……我认为\\\\->\\n因为这没有帮助。您能提供一段源代码吗？使用您的示例，我不知道您的字符串是否真的包含反斜杠，或者它们是否用于转义Java字符串中的引号……我认为\\\\->\\becouse它没有帮助我认为\\\\->\\becouse它没有帮助help@KliverMaxstr.replaceAll（）；接受正则表达式。仅尝试str.replace（“\\”，”）；该函数适用于所有字符序列，但我不能仅对
/
@KliverMax\执行任何操作。该\在字符串和正则表达式中都是转义字符。让我们@KliverMax str.replaceAll（）；接受正则表达式。仅尝试str.replace（“\\”，”）；该函数适用于所有字符序列，但我不能仅对
/
@KliverMax\执行任何操作。该\在字符串和正则表达式中都是转义字符