HashMap同时遍历key与value

遍历整体Object 使用entrySet
for(Iterator iter = hp.entrySet().iterator();iter.hasNext();){
Map.Entry element = (Map.Entry)iter.next();
Object strKey = element.getKey();
Object strObj = element.getValue();
}

遍历key 使用keySet
for(Iterator iter = hp.keySet().iterator();iter.hasNext();){
iter
Object key = iterator.next();
}
遍历value 使用values()
for(Iterator iter = hp.values().iterator();iter.hasNext();){
iter
Object key = iterator.next();
}

附加：
对文件夹中每个文件进行遍历
File file = new File("src/form/"); // 根目录
String[] filelist = file.list(); // 目录下的文件列表
for (int i = 0; i < filelist.length; i++) {
File fPatter = new File("src/form/" + filelist[i]);
InputStreamReader readPatter = new InputStreamReader (new FileInputStream(fPatter),"UTF-8");
}