java bufferreader乱码,javaBufferdReader读取文件乱码以下为读取文件方法123456789101112131415161718192021222324252627pri...
javaBufferdReader读取文件乱码
以下为读取文件方法1
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27private static void putIdGame(){
URL.setURLStreamHandlerFactory(new FsUrlStreamHandlerFactory());
int count = 0;
try {
URL url = new URL(HDFS + path);
InputStream gameList = url.openStream();
BufferedReader reader_url = new BufferedReader(new InputStreamReader(gameList,"UTF-8"));
String inString_RL = reader_url.readLine();
while (inString_RL != null && count < 50) {
int userId;
String[] str = inString_RL.split(",");
count ++;
map.put(str[1], str[0]);
System.out.println(str[0]);
inString_RL = reader_url.readLine();
}
reader_url.close();
} catch (FileNotFoundException e) {
System.out.println("未找文件！");
} catch (IOException e1) {
System.out.println("文件读写错误！");
}
}
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26static
URL.setURLStreamHandlerFactory(new FsUrlStreamHandlerFactory());
int count = 0;
try {
URL url = new URL(HDFS + path);
InputStream gameList = url.openStream();
BufferedReader reader_url = new BufferedReader(new InputStreamReader(gameList,"UTF-8"));newBufferedReadernew
String inString_RL = reader_url.readLine();
while (inString_RL != null && count < 50) {null
int userId;
String[] str = inString_RL.split(",");strsplit
count ++;
map.put(str[1], str[0]);str1str
System.out.println(str[0]);str
inString_RL = reader_url.readLine();
}
reader_url.close();
} catch (FileNotFoundException e) {
System.out.println("未找文件！");
} catch (IOException e1) {
System.out.println("文件读写错误！");
}
在InputStreamReader中加入”UTF-8”即可
Java读取文件时第一行出现乱码“？”问号
在windows 环境下，使用java文件流读取文本文件时，会出现第一个字符为未知字符”?” ,其他字符完整。而且第一个字符显示为？但是用equals比对发现并非是”?”号,google之，了解到bom编码标记。使用 16进制打印输出结果：
只要出现该头的16进制编码为这种字符便可以断定该文本文件的编码方式了。
bom编码标记：
bom全称是：byte order mark，汉语意思是标记字节顺序码。只是出现在：unicode字符集中，只有unicode字符集，存储时候，要求指定编码，如果不指定，windows还会用默认的：ANSI读取。常见的bom头是：
UTF-8 ║ EF BB BF
UTF-16LE ║ FF FE (小尾)
UTF-16BE ║ FE FF (大尾)
UTF-32LE ║ FF FE 00 00
UTF-32BE ║ 00 00 FE FF
解决方法：工具将txt文件另存为UTF-8无BOM格式
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17String
StringBuffer strBuff = new StringBuffer();
String temp = null;
BufferedReader reader = new BufferedReader(new InputStreamReader(in,Charset.forName("utf-8")));BufferedReadernewInputStreamReaderin
while ((temp = reader.readLine()) != null) {
byte[] by = temp.getBytes();
String header = Integer.toHexString(by[0]).toUpperCase();
if (header.equalsIgnoreCase("FFFFFFEF") || header.equalsIgnoreCase("3F")) {"FFFFFFEF"
strBuff.append(temp.substring(1) + "n");
continue;
}
strBuff.append(temp + "n");
}
reader.close();
in.close();
return strBuff.toString();