JAvaローカルフォルダ内のファイルを読み込み、並べ替え
まずクラスを定義します.ファイルのソートに使用
class SortFile {
public long size;
public long date;
public String name;
public SortFile(String name, long date, long size) {
this.name = name;
this.date = date;
this.size = size;
}
public static SortFile[] sort(SortFile[] src, String mark, boolean rule) {
if (rule) {//
for (int i = src.length; i > 1; i--) {
for (int j = 0; j < i - 1; j++) {
boolean change = false;
if (mark.equals("name")) {
if (src[j].name.compareTo(src[j + 1].name) > 0) {
change = true;
}
}
else if (mark.equals("date")) {
if (src[j].date > src[j + 1].date) {
change = true;
}
}
else {
if (src[j].size > src[j + 1].size) {
change = true;
}
}
if (change) {
SortFile temp = src[j];
src[j] = src[j + 1];
src[j + 1] = temp;
}
}
}
}
else { //
for (int i = src.length; i > 1; i--) {
for (int j = 0; j < i - 1; j++) {
boolean change = false;
if (mark.equals("name")) {
if (src[j].name.compareTo(src[j + 1].name) < 0) {
change = true;
}
}
else if (mark.equals("date")) {
if (src[j].date < src[j + 1].date) {
change = true;
}
}
else {
if (src[j].size < src[j + 1].size) {
change = true;
}
}
if (change) {
SortFile temp = src[j];
src[j] = src[j + 1];
src[j + 1] = temp;
}
}
}
}
return src;
}
//
ArrayList al = new ArrayList();
File f = new File("E:\\test");
String[] names = f.list();
for (int i = 0; i < names.length; i++) {
File fs = new File(f, names[i]);
SortFile sf = new SortFile(names[i],fs.lastModified(), fs.length());
al.add(sf); }
//
SortFile[] sfSrc = new SortFile[al.size()];
for(int i=0;i<al.size();i++){
sfSrc[i] = (SortFile) al.get(i);
System.out.println(sfSrc[i].name+" "+sfSrc[i].size+" "+sfSrc[i].date);
}
// date ,name ,size
SortFile[] forName = SortFile.sort(sfSrc,"date",true);
//true ,false
for(int i=0;i<forName.length;i++){
System.out.println(forName[i].name+" "+forName[i].size+" "+forName[i].date);
}