java 往csv文件写入内容乱码

在往csv文件中写入内容的时候，习惯性的指定了utf-8编码，原以为啥事都没有，但是打开文件的时候，一下子就懵逼了
具体代码如下：
     

public static void main(String[] args) throws Exception {
File file = new File( "D:/country.csv");
if (! file.exists()) {
file.createNewFile();
}
OutputStreamWriter out = new OutputStreamWriter( new FileOutputStream(file ), "UTF-8" );
BufferedWriter bw = new BufferedWriter( out);
try {
String path = writeCSV.class .getResource("LocList.xml" ).getPath();
SAXReader reader = new SAXReader();
try {
Document document = reader.read(path);
Element rootElement = document.getRootElement();
Iterator< Element> iterator = rootElement.elementIterator();
Element ele = null;
while ( iterator.hasNext()) {
ele = iterator.next();
String country = ele.attributeValue( "Name");
List< Element> provinces = ele.elements();
if ( provinces == null || provinces.isEmpty()) {
writeCSVLine(country, country, country, bw);
continue;
}
for ( Element pe : provinces) {
String province = pe.attributeValue( "Name");
if ( StringUtils.isEmpty(province)) {
province = country;
}
List< Element> cities = pe.elements();
if ( cities == null || cities.isEmpty()) {
writeCSVLine(country, province, province, bw);
continue;
}
for ( Element ce : cities) {
String city = ce.attributeValue( "Name");
if ( StringUtils.isEmpty(city)) {
city = province;
}
writeCSVLine(country, province, city, bw);
}
}
}
System. out.println( "写入成功!" );
}
catch (Exception e) {
return;
}
}
finally {
bw.close();
}
}

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public static void writeCSVLine(String country, String province, String city, BufferedWriter bw)
throws IOException {
StringBuilder sb = new StringBuilder();
sb.append( country).append( ',').append( province).append( ',').append( city);
bw.write(sb.toString());
bw.newLine();
}

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[align=left]既然utf-8不行，那我们试试gb2312？[/align]
[align=left]说干就干，修改代码如下：[/align]
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OutputStreamWriter out = new OutputStreamWriter( new FileOutputStream(file), "gb2312" );

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[align=left]run as...然而，现实又一次无情的摧残着我，还是不行，没办法，那就挨个都试一遍吧，试试gbk[/align]
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OutputStreamWriter out = new OutputStreamWriter( new FileOutputStream(file), "gbk" );

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[align=left]等待着，终于，打开文件的那刹那，没看到乱码，欧耶~[/align]
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[align=left]那么问题来了，为什么要用gbk呢？这三者有什么区别？[/align]
[align=left]http://www.cnblogs.com/xiaomia/archive/2010/11/28/1890072.html  这篇文章很详细的解释了这几者的区别和联系。[/align]