在Java中将ANSI字符转换为UTF-8 [英] Convert ANSI characters to UTF-8 in Java

问题描述

有一种方法可以使用Java将ANSI字符串转换为UTF。

我有一个自定义序列化程序，使用readUTF& writeUTF方法的DataInputStream类反序列化和serialze字符串。如果我收到一个字符串编码的ANSI和太长，〜100000字符长我得到错误;

导致：
java.io.UTFDataFormatException：
编码字符串太长：106958字节

但是在我的Junit测试中，我可以创建一个包含120000'a'

我已检查以下帖子，但仍有错误;

• 将UTF-8转换为ISO -8859-1 in Java - how to keep it as single byte


• 
  

解决方案

此错误不是由字符编码引起的。这意味着UTF数据的长度是错误的。

编辑：只是意识到这是一个写错误，而不是读错误。

UTF长度只有2个字节，因此它只能保存64K个UTF-8字节。

这个限制是硬编码的，没有办法解决这个问题，

  if（utflen> 65535）
 throw new UTFDataFormatException（
encoded string too long：+ utflen +bytes 
  

Is there a way to convert an ANSI string to UTF using Java.

I have a custom serializer that uses readUTF & writeUTF methods of the DataInputStream class to deserialize and serialze string. If i receive a string encoded in ANSI and is too long, ~100000 chars long i get the error;

Caused by: java.io.UTFDataFormatException: encoded string too long: 106958 bytes

However in my Junit tests i'm able create a string with 120000 'a's and it works perfectly

I have checked the following posts but still having errors;

• Converting UTF-8 to ISO-8859-1 in Java - how to keep it as single byte
• How do I replace accented Latin characters in Ruby?

解决方案

This error is not caused by character encoding. It means the length of the UTF data is wrong.

EDIT: Just realized this is a writing error, not reading error.

The UTF length is only 2 bytes so it can only hold 64K UTF-8 bytes. You are trying to writing 100K, it's not going to work.

This limit is hardcoded and no way to get around this,

if (utflen > 65535)
    throw new UTFDataFormatException(
            "encoded string too long: " + utflen + " bytes");

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