删除{}之间的空格

Question

<#if  {   cntry  }  =  "FI"  >  <#if  {   addr2  }  =  " "  >" "  <#else> ${  addr2   }    </#if>  ${   addr1  }    ${   zipcd  }   ${   city  }      <#else> <#if  {   addr2  }  =  " "  >" "  <#else> ${  addr2   }    </#if>  ${   addr1  }    ${   addr2  }   ${   addr3  }    ${   cntry_desc  }  ok fine  </#if>

我希望输出为

<#if  {cntry}  =  "FI"  >  <#if  {addr2}  =  " "  >" "  <#else> ${addr2}    </#if>  ${addr1}    ${zipc}   ${city}      <#else> <#if  {addr2}  =  " "  >" "  <#else> ${addr2}    </#if>  ${addr1}    ${addr2}   ${addr3}    ${cntry_desc}  ok fine  </#if>

只想删除{}

之间的空格

Answer 1

你可以做到

str = str.replaceAll("\\{\\s*", "{")
         .replaceAll("\\s*\\}", "}")

Answer 2

或者您可以使用

\{\s+([\w]+)\s+\}

并使用

{$1}

作为替代品。

所以，这段代码

String raw = "<#if  {   cntry  }  =  \"FI\"  >  <#if  {   addr2  }  =  \" \"  >\" \"  <#else> ${  addr2   }    </#if>  ${   addr1  }    ${   zipcd  }   ${   city  }      <#else> <#if  {   addr2  }  =  \" \"  >\" \"  <#else> ${  addr2   }    </#if>  ${   addr1  }    ${   addr2  }   ${   addr3  }    ${   cntry_desc  }  ok fine  </#if>";
raw.replaceAll("\\{\\s+([\\w]+)\\s+\\}", "{$1}");

将返回

<#if  {cntry}  =  "FI"  >  <#if  {addr2}  =  " "  >" "  <#else> ${addr2}    </#if>  ${addr1}    ${zipcd}   ${city}      <#else> <#if  {addr2}  =  " "  >" "  <#else> ${addr2}    </#if>  ${addr1}    ${addr2}   ${addr3}    ${cntry_desc}  ok fine  </#if>

Answer 3

只要{和}未嵌套，您就可以使用此正则表达式进行搜索：

" +(?=[^{]*})"

并将其用于替换：

""

Java代码：

String repl = input.replaceAll(" +(?=[^{]*})", "");

RegEx Demo