[英]java String replaceAll “ to \\”
I want to replace " in my string to \\" for later use by Javascript JSON.parse(...), I try the following test我想将我的字符串中的“替换为\\”以供Javascript JSON.parse(...)以后使用,我尝试以下测试
String name = "\"ab\"c";
System.out.println("name before escape="+name);
String name1 = name.replaceAll("\"", "\\\"");
System.out.println("name1="+name1);
String name2 = name.replaceAll("\"", "\\\\\"");
System.out.println("name2="+name2);
String name3 = name.replaceAll("\"", "\\\\\\\"");
System.out.println("name3="+name3);
and result as follow:结果如下:
name before escape="ab"c
name1="ab"c
name2=\"ab\"c
name3=\"ab\"c
so all fail, and I don't understand the output result所以都失败了,我不明白 output 结果
[Update1} [更新1}
for question 2, I found the following work对于问题2,我发现了以下工作
System.out.println("name4=" + name.replaceAll("\"", Matcher.quoteReplacement("\\\\\"")));
Although I feel lost for the reason it works...虽然我因为它起作用的原因而感到迷茫......
It's better to use replace()
instead of replaceAll()
:最好使用
replace()
而不是replaceAll()
:
String name = "\"ab\"c";
System.out.println("name before escape=" + name);
System.out.println("name1=" + name.replace("\"", "\\\\\""));
Output: Output:
name before escape="ab"c
name1=\\"ab\\"c
Don't use replaceAll
, use replace
: name.replace("\"", "\\\"");
不要使用
replaceAll
,使用replace
: name.replace("\"", "\\\"");
The reason is that replaceAll
uses regex and it can mess all your formatting up.原因是
replaceAll
使用正则表达式,它会弄乱你所有的格式。
class Main {
public static void main(String[] args) {
String name = "\"ab\"c";
String name1 = name.replace("\"", "\\\\\"");
System.out.println(name1); // Prints: \\"ab\\"c
}
}
use replaceAll need to escape \ and "使用 replaceAll 需要转义 \ 和 "
String name = "\"ab\"c";
System.out.println("name before escape="+name);
String name1 = name.replaceAll("\\\"", "\\\\\\\\\"");
System.out.println("name1="+name1);
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