problem json \n unicode to string java

The Apache Commons Lang StringEscapeUtils.unescapeJava() can decode it properly.

import org.apache.commons.lang.StringEscapeUtils;

@Test
public void testUnescapeJava() {
    String sJava="\\u0048\\u0065\\u006C\\u006C\\u006F";
    System.out.println("StringEscapeUtils.unescapeJava(sJava):\n" + StringEscapeUtils.unescapeJava(sJava));
}


 output:
 StringEscapeUtils.unescapeJava(sJava):

utf-8 problem



108down vote


Mind that the utf8 declaration used in your connect-string is reported to be not working. In the comments on php.net I frequently see this alternative:
$dbHandle = new PDO("mysql:host=$dbHost;dbname=$dbName;charset=utf8", $dbUser, $dbPass,
                    array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES 'utf8'"));

 Hello



up vote11down voteaccepted


Technically doing:
String myString = "\u0048\u0065\u006C\u006C\u006F World";

automatically converts it to "Hello World", so I assume you are reading in the string from some file. In order to convert it to "Hello" you'll have to parse the text into the separate unicode digits, (take the \uXXXX and just get XXXX) then do Integer.ParseInt(XXXX, 16) to get a hex value and then case that to char to get the actual character.

Edit: Some code to accomplish this:

String str = myString.split(" ")[0];

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

String[] arr = str.split("u");

String text = "";

for(int i = 1; i < arr.length; i++){

    int hexVal = Integer.parseInt(arr[i], 16);

    text += (char)hexVal;

}

// Text will now have Hello

problem json \n unicode to string java

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