Java convert Windows-1252 to UTF-8, some letters are wrong

问题

I receive data from external Microsoft SQL 2008 Data base (I make Queries with MyBatis). In theroy I receive data encoding on "Windows-1252".

I try decoded data with this code:

String textoFormado = ...value from MyBatis... ;

String s = new String(textoFormado.getBytes("Windows-1252"), "UTF-8");

Almost all the String is correctly decoded. But some letter with acents not.

For Example:

I Receive from Data base this String: "Ã�vila"
I use the above code and this make this String: "�?vila"
I expected this String: "Ávila"

回答1:

Obviously, textoFormado is a variable of type String. This means that the bytes were already decoded. Java then internally uses a 16-bit Unicode representation. What you did, is to encode your string with Windows-1252 followed by reading the resulting bytes with an UTF-8 encoding. That does not work.

What you need is the correct encoding when reading the bytes:

byte[] sourceBytes = getRawBytes();
String data = new String(sourceBytes , "Windows-1252");

For using this string inside your program, you do not need to do anything. Simply use it. If - however - you want to write the data back to a file for example, you need to encode again:

byte[] destinationBytes = data.getBytes("UTF-8");
// write bytes to destination file here

回答2:

I solved it thanks to all.

I have the next project structure:

MyBatisQueries: I have a query with a "select" which gives me the String
Pojo to save the String (which gave me the String with conversion problems)
The class which uses the query and the Pojo object with data (that showed me bad decoded)

at first I had (MyBatis and Spring inject dependencies and params):

public class Pojo {
    private String params;
    public void setParams(String params) {
        try {
            this.params = params;
        }
    }

}

The solution:

public class Pojo {
    private String params;
    public void setParams(byte[] params) {
        try {
            this.params = new String(params, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            this.params = null;
        }
    }

}

来源：https://stackoverflow.com/questions/23082522/java-convert-windows-1252-to-utf-8-some-letters-are-wrong

标签

java

utf-8

utf8-decode

windows-1252