Introduction to the solution to Chinese garbled characters when reading files in Java

Java reads text files (such as csv files, txt files, etc.), and when encountering Chinese, it becomes garbled. (Recommended: java video tutorial)

Read the code as follows:

List<string> lines=new ArrayList<string>();    
BufferedReader br = new BufferedReader(new FileReader(fileName));  
String line = null;  
while ((line = br.readLine()) != null) {   
      lines.add(line);  
}  
br.close();</string></string>

Principle:

Java's I/O class processing is as follows Figure:

The Reader class is the parent class for reading characters in Java's I/O, and the InputStream class is the parent class for reading bytes. The InputStreamReader class is the bridge that associates bytes to characters. It is responsible for reading characters in I/O. The O process handles the conversion of read bytes into characters, and the specific decoding of bytes into characters is implemented by StreamDecoder. In the decoding process of StreamDecoder, the user must specify the Charset encoding format. It is worth noting that if you do not specify Charset, the default character set in the local environment will be used. For example, in the Chinese environment, GBK encoding will be used.

Summary: When Java reads the data stream, you must specify the encoding method of the data stream, otherwise the default character set in the local environment will be used.

After the above analysis, the modified code is as follows:

List<string> lines=new ArrayList<string>();  
BufferedReader br=new BufferedReader(new InputStreamReader(new FileInputStream(fileName),"UTF-8"));  
String line = null;  
while ((line = br.readLine()) != null) {  
      lines.add(line);  
}  
br.close();</string></string>

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