how to replace “(double quotes) in a string with \” in java

问题

I have string variable strVar with value as ' "value1" ' and i want to replace all the double quotes in the value with ' \" '. So after replacement value would look like ' \"value1\" '

How to do this in java? Kindly help me.

回答1:

You are looking for

strVar = strVar.replace("\"", "\\\"")

DEMO

I would avoid using replaceAll since it uses regex syntax in description of what to replace and how to replace, which means that \ will have to be escaped in string "\\" but also in regex \\ (needs to be written as "\\\\" string) which means that we would need to use

replaceAll("\"", "\\\\\"");

or probably little cleaner:

replaceAll("\"", Matcher.quoteReplacement("\\\""))

With replace we have escaping mechanism added automatically.

回答2:

actually it is: strVar.replaceAll("\"", "\\\\\"");

回答3:

For example take a string which has structure like this--->>>

String obj = "hello"How are"you";

And you want replace all double quote with blank value or in other word,if you want to trim all double quote.

Just do like this,

String new_obj= obj.replaceAll("\"", "");

回答4:

Strings are formatted with double quotes. What you have is single quotes, used for chars. What you want is this:

String foo = " \"bar\" ";

回答5:

This should give you what you want;

System.out.println("'\\\" value1 \\\"'");

回答6:

To replace double quotes

str=change condition to"or"      

str=str.replace("\"", "\\"");

After Replace:change condition to\"or\"

To replace single quotes

str=change condition to'or'      

str=str.replace("\'", "\\'");

After Replace:change condition to\'or\'

来源：https://stackoverflow.com/questions/19299788/how-to-replace-double-quotes-in-a-string-with-in-java