java中将map集合写入txt文本

public static void main(String[] args)

{

// TODO Auto-generated method stub

Map map = new HashMap();

map.put("k1","v1");

map.put("k2","v2");

map.put("k3","v3");

try {

String line = System.getProperty("line.separator");

StringBuffer str = new StringBuffer();

FileWriter fw = new FileWriter("D:\\1.txt", true);

Set set = map.entrySet();

Iterator iter = set.iterator();

while(iter.hasNext()){

Map.Entry entry = (Map.Entry)iter.next();

str.append(entry.getKey()+" : "+entry.getValue()).append(line);

}

fw.write(str.toString());

fw.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}