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分享java高手请入 数据算法
已知一变量
输入：String s="jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
如果将这一变量转换为(格式说明[id,pid,name]:id:序号:pid:上级目录,name:名称)写一算法
输出：s=" [[1,0,"jar.bat"],[2,0,"temp"],[3,2,"jar.bat"],[4,2,"rr.txt"],[5,2,"aa"],[6,5,"44.txt"],[7,5,"bb"]] ";
输入：String s="jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
如果将这一变量转换为(格式说明[id,pid,name]:id:序号:pid:上级目录,name:名称)写一算法
输出：s=" [[1,0,"jar.bat"],[2,0,"temp"],[3,2,"jar.bat"],[4,2,"rr.txt"],[5,2,"aa"],[6,5,"44.txt"],[7,5,"bb"]] ";
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zimo_1993 2018-06-22
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String s="jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
class EntityA {
int id;
int pid;
String name;
public String toString() {
return "["+this.id+","+this.pid+",\""+this.name+"\"]";
}
}
String array[]=s.split(",");
List<EntityA> entityList = new ArrayList<EntityA>();
for(int i=0; i<array.length; i++) {
EntityA a =new EntityA();
a.id=i+1;
String nameArray[] = array[i].split("/");
int len = nameArray.length;
if (len == 1) {
a.name=nameArray[0];
} else {
a.name=nameArray[len-1];
for (int j=0; j<entityList.size(); j++) {
EntityA pEntity = entityList.get(j);
if (pEntity.name.equals(nameArray[len-2])) {
a.pid=j+1;
break;
}
}
}
entityList.add(a);
}
StringBuilder builder = new StringBuilder("[");
for (EntityA entity : entityList) {
builder.append(entity.toString()).append(",");
}
String out= builder.toString();
System.out.println(out.substring(0, out.length()-1)+"]");
class EntityA {
int id;
int pid;
String name;
public String toString() {
return "["+this.id+","+this.pid+",\""+this.name+"\"]";
}
}
String array[]=s.split(",");
List<EntityA> entityList = new ArrayList<EntityA>();
for(int i=0; i<array.length; i++) {
EntityA a =new EntityA();
a.id=i+1;
String nameArray[] = array[i].split("/");
int len = nameArray.length;
if (len == 1) {
a.name=nameArray[0];
} else {
a.name=nameArray[len-1];
for (int j=0; j<entityList.size(); j++) {
EntityA pEntity = entityList.get(j);
if (pEntity.name.equals(nameArray[len-2])) {
a.pid=j+1;
break;
}
}
}
entityList.add(a);
}
StringBuilder builder = new StringBuilder("[");
for (EntityA entity : entityList) {
builder.append(entity.toString()).append(",");
}
String out= builder.toString();
System.out.println(out.substring(0, out.length()-1)+"]");
guohui_chn 2018-05-29
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import java.util.*;
public class PathConverter {
private final static String FILE_SEPARATOR = "/";
private final static String PATH_SEPARATOR = ",";
private static class Node{
private static int _ID = 0;
private int id;
private int pid;
private String name;
private String absoluteName;
private boolean bFile;
private Map<String,Node> children;
private Node(int pid,boolean bFile,String path, String name){
this.id = _ID++;
this.pid = pid;
this.absoluteName = path;
this.name = name;
this.children = new HashMap<>();
this.bFile = bFile;
}
@Override
public String toString(){
return String.format("[%d,%d,\"%s\"]",id,pid,bFile?absoluteName:name);
}
}
public String convert(String src){
if(src == null || src.length() == 0){
return "";
}
Node root = new Node(0,false,"","");
for(String path : src.split(PATH_SEPARATOR)){
addNode(root,path);
}
Node._ID = 0;
List<Node> nodes = new ArrayList<>();
visitChildren(nodes,root);
nodes.remove(root);
Collections.sort(nodes, new Comparator<Node>() {
@Override
public int compare(Node o1, Node o2) {
return o1.id - o2.id;
}
});
return join(nodes,",");
}
private void addNode(Node root, String path){
String[] parts = path.split(FILE_SEPARATOR);
Node tmp = root;
Pnnnnnjh<String> visitedParts = new ArrayList<>();
for(int i = 0 ; i < parts.length ; i++){
String part = parts[i];
boolean bFile = false;
if(i==parts.length-1 && !path.endsWith(FILE_SEPARATOR)){
bFile = true;
}
visitedParts.add(part);
if(!tmp.children.containsKey(part)){
Node newNode = new Node(tmp.id,bFile,join(visitedParts,FILE_SEPARATOR),part);
tmp.children.put(newNode.name,newNode);
}
tmp = tmp.children.get(part);
}
}
private String join(Collection<?> col, String delim) {
StringBuilder sb = new StringBuilder();
Iterator<?> iter = col.iterator();
if (iter.hasNext())
sb.append(iter.next().toString());
while (iter.hasNext()) {
sb.append(delim);
sb.append(iter.next().toString());
}
return sb.toString();
}
private void visitChildren(List<Node> nodes,Node node){
nodes.add(node);
if(node.children.size() > 0){
for(Node childNode : node.children.values()) {
visitChildren(nodes, childNode);
}
}
}
public static void main(String[] args){
PathConverter pathConverter = new PathConverter();
System.out.println(pathConverter.convert("jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/"));
//[1,0,"jar.bat"],[2,0,"temp"],[3,2,"aa"],[4,2,"temp/jar.bat"],[5,2,"temp/rr.txt"],[6,3,"temp/aa/44.txt"],[7,3,"bb"]
System.out.println(pathConverter.convert("1.zip(1002.00B),1/jar.bat(26.00B),1/temp/jar.bat(26.00B),1/temp/rr.txt(0 B),1/temp/aa/44.txt(0 B)"));
//[1,0,"1.zip(1002.00B)"],[2,0,"1"],[3,2,"1/jar.bat(26.00B)"],[4,2,"temp"],[5,4,"1/temp/jar.bat(26.00B)"],[6,4,"1/temp/rr.txt(0 B)"],[7,4,"aa"],[8,7,"1/temp/aa/44.txt(0 B)"]
System.out.println(pathConverter.convert("jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)"));
//[1,0,"jar.bat(26.00B)"],[2,0,"temp"],[3,2,"temp/jar.bat(26.00B)"],[4,2,"temp/rr.txt(0 B)"],[5,2,"aa"],[6,5,"temp/aa/44.txt(0 B)"]
}
}
weixin_42138479 2018-05-04
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小白 来看看专家怎么说：思路：先用split方法转换为char[]数组；遍历数组的每个元素，正则表达式search看有没有"."，没有就是文件夹，否则是文件，点号后面的东西就是文件类型；本来想写一个树，但是其实不用，对于每个用绝对路径表示的文件，调用split方法，除掉最后一个元素就是它的父亲，在判断父亲的同时判断孩子（比如已经判断出a是b的父亲，那同时记下b是a的孩子，这是两个不同的概念，一个是存储的a结点，另一个是存储在b结点中）。这样一想，嗯，还是要写一个树，或者至少写一个类来表示链表结构好了。
放开那禽兽冲我来 2018-05-04
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import java.util.*;
public class PathConverter {
private final static String FILE_SEPARATOR = "/";
private final static String PATH_SEPARATOR = ",";
private static class Node{
private static int _ID = 0;
private int id;
private int pid;
private String name;
private String absoluteName;
private boolean bFile;
private Map<String,Node> children;
private Node(int pid,boolean bFile,String path, String name){
this.id = _ID++;
this.pid = pid;
this.absoluteName = path;
this.name = name;
this.children = new HashMap<>();
this.bFile = bFile;
}
@Override
public String toString(){
return String.format("[%d,%d,\"%s\"]",id,pid,bFile?absoluteName:name);
}
}
public String convert(String src){
if(src == null || src.length() == 0){
return "";
}
Node root = new Node(0,false,"","");
for(String path : src.split(PATH_SEPARATOR)){
addNode(root,path);
}
Node._ID = 0;
List<Node> nodes = new ArrayList<>();
visitChildren(nodes,root);
nodes.remove(root);
Collections.sort(nodes, new Comparator<Node>() {
@Override
public int compare(Node o1, Node o2) {
return o1.id - o2.id;
}
});
return join(nodes,",");
}
private void addNode(Node root, String path){
String[] parts = path.split(FILE_SEPARATOR);
Node tmp = root;
List<String> visitedParts = new ArrayList<>();
for(int i = 0 ; i < parts.length ; i++){
String part = parts[i];
boolean bFile = false;
if(i==parts.length-1 && !path.endsWith(FILE_SEPARATOR)){
bFile = true;
}
visitedParts.add(part);
if(!tmp.children.containsKey(part)){
Node newNode = new Node(tmp.id,bFile,join(visitedParts,FILE_SEPARATOR),part);
tmp.children.put(newNode.name,newNode);
}
tmp = tmp.children.get(part);
}
}
private String join(Collection<?> col, String delim) {
StringBuilder sb = new StringBuilder();
Iterator<?> iter = col.iterator();
if (iter.hasNext())
sb.append(iter.next().toString());
while (iter.hasNext()) {
sb.append(delim);
sb.append(iter.next().toString());
}
return sb.toString();
}
private void visitChildren(List<Node> nodes,Node node){
nodes.add(node);
if(node.children.size() > 0){
for(Node childNode : node.children.values()) {
visitChildren(nodes, childNode);
}
}
}
public static void main(String[] args){
PathConverter pathConverter = new PathConverter();
System.out.println(pathConverter.convert("jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/"));
//[1,0,"jar.bat"],[2,0,"temp"],[3,2,"aa"],[4,2,"temp/jar.bat"],[5,2,"temp/rr.txt"],[6,3,"temp/aa/44.txt"],[7,3,"bb"]
System.out.println(pathConverter.convert("1.zip(1002.00B),1/jar.bat(26.00B),1/temp/jar.bat(26.00B),1/temp/rr.txt(0 B),1/temp/aa/44.txt(0 B)"));
//[1,0,"1.zip(1002.00B)"],[2,0,"1"],[3,2,"1/jar.bat(26.00B)"],[4,2,"temp"],[5,4,"1/temp/jar.bat(26.00B)"],[6,4,"1/temp/rr.txt(0 B)"],[7,4,"aa"],[8,7,"1/temp/aa/44.txt(0 B)"]
System.out.println(pathConverter.convert("jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)"));
//[1,0,"jar.bat(26.00B)"],[2,0,"temp"],[3,2,"temp/jar.bat(26.00B)"],[4,2,"temp/rr.txt(0 B)"],[5,2,"aa"],[6,5,"temp/aa/44.txt(0 B)"]
}
}
zhaoht_2218 2018-05-03
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/**
* @date 2018/5/3
*/
public class Test {
public static void main(String[] args) {
String s = "jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
String a = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
Test t = new Test();
System.out.println(t.format(a));
}
private String format(String s) {
StringBuilder sb = new StringBuilder();
sb.append("[");
String[] newStrings = s.split(",");
for (int i = 0; i < newStrings.length; i++) {
sb.append("[");
if (!newStrings[i].contains("/")) {
sb.append(i + 1).append(",").append(0).append(",").append("\"").append(newStrings[i]).append("\"");
} else {
String[] childStrings = newStrings[i].split("/");
if (childStrings[childStrings.length - 1].contains(".")) {
sb.append(i + 1).append(",").append(childStrings.length).append(",").append("\"").append(childStrings[childStrings.length - 1]).append("\"");
} else {
if (childStrings.length >= 2) {
sb.append(i + 1).append(",").append(childStrings.length).append(",").append("\"").append(childStrings[childStrings.length - 1]).append("\"");
} else {
sb.append(i + 1).append(",").append(0).append(",").append("\"").append(childStrings[childStrings.length - 1]).append("\"");
}
}
}
if (i == newStrings.length - 1) {
sb.append("]");
} else {
sb.append("],");
}
}
sb.append("]");
return sb.toString();
}
}
zhaoht_2218 2018-05-03
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/**
* @date 2018/5/3
*/
public class Test {
public static void main(String[] args) {
String s = "jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
String a = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
Test t = new Test();
System.out.println(t.format(a));
}
private String format(String s) {
StringBuilder sb = new StringBuilder();
sb.append("[");
String[] newStrings = s.split(",");
for (int i = 0; i < newStrings.length; i++) {
sb.append("[");
if (!newStrings[i].contains("/")) {
sb.append(i + 1).append(",").append(0).append(",").append("\"").append(newStrings[i]).append("\"");
} else {
String[] childStrings = newStrings[i].split("/");
if (childStrings[childStrings.length - 1].contains(".")) {
sb.append(i + 1).append(",").append(childStrings.length).append(",").append("\"").append(childStrings[childStrings.length - 1]).append("\"");
} else {
if (childStrings.length >= 2) {
sb.append(i + 1).append(",").append(childStrings.length).append(",").append("\"").append(childStrings[childStrings.length - 1]).append("\"");
} else {
sb.append(i + 1).append(",").append(0).append(",").append("\"").append(childStrings[childStrings.length - 1]).append("\"");
}
}
}
if (i == newStrings.length - 1) {
sb.append("]");
} else {
sb.append("],");
}
}
sb.append("]");
return sb.toString();
}
}
reyoreyoreyo 2018-05-02
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发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
[/quote]你在存temp/jar.bat之前不应该先存在temp/吗？[/quote]
你没注意看问题，是发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
Exception in thread "main" java.lang.NullPointerException
at reyo.sdk.utils.test.Test.getMenu(Test.java:48)
at reyo.sdk.utils.test.Test.main(Test.java:30)[/quote]
报异常的原因是因为在处理temp/jar.bat文件时要存pid也就是temp/的id
但是你给的字符串中并没有temp/所以报空指针，pid也就不存在[/quote]
要的就是算法？如果给了pid还是算法？
AMX50B 2018-04-27
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发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
[/quote]你在存temp/jar.bat之前不应该先存在temp/吗？[/quote]
你没注意看问题，是发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
Exception in thread "main" java.lang.NullPointerException
at reyo.sdk.utils.test.Test.getMenu(Test.java:48)
at reyo.sdk.utils.test.Test.main(Test.java:30)[/quote]
报异常的原因是因为在处理temp/jar.bat文件时要存pid也就是temp/的id
但是你给的字符串中并没有temp/所以报空指针，pid也就不存在
reyoreyoreyo 2018-04-27
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发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
[/quote]你在存temp/jar.bat之前不应该先存在temp/吗？[/quote]
你没注意看问题，是发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
Exception in thread "main" java.lang.NullPointerException
at reyo.sdk.utils.test.Test.getMenu(Test.java:48)
at reyo.sdk.utils.test.Test.main(Test.java:30)
AMX50B 2018-04-27
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发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
[/quote]你在存temp/jar.bat之前不应该先存在temp/吗？
reyoreyoreyo 2018-04-26
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同问，输出好像是有问题的？[/quote]
同问，输出好像是有问题的？[/quote]
已知一变量
输入：String s="jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
如果将这一变量转换为(格式说明[id,pid,name]:id:序号:pid:上级目录,name:名称)写一算法
输出：[[1,0,"jar.bat"],[2,0,"temp"],[3,2,"aa"],[4,2,"jar.bat"],[5,2,"rr.txt"],[6,3,"44.txt"],[7,3,"bb"]]
reyoreyoreyo 2018-04-26
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发现bug当
String s = "jar.bat(26.00B),temp/jar.bat(26.00B),temp/rr.txt(0 B),temp/aa/44.txt(0 B)";
程序错误
reyoreyoreyo 2018-04-26
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非常感觉您的及时回复。
再有一进阶的要求，多一判断如果为文件 加上全路径如
源字符串：1.zip(1002.00B),1/jar.bat(26.00B),1/temp/jar.bat(26.00B),1/temp/rr.txt(0 B),1/temp/aa/44.txt(0 B)
输出结果：[[1,0,"1.zip(1002.00B)"],[2,0,"1"],[3,2,"1/jar.bat(26.00B)"],[4,2,"temp"],[5,4,"1/temp/jar.bat(26.00B)"],[6,4,"1/temp/rr.txt(0 B)"],[7,4,"aa"],[8,7,"1/temp/aa/44.txt(0 B)"]]
AMX50B 2018-04-26
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public class Test {
public static void main(String[] args) {
String s="jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
String[] tar = s.split(",");
List<Model> list = new ArrayList();
Map<String,Integer> files = new HashMap<String,Integer>();
for(int i=0;i<tar.length;i++){
Model model = new Model();
model.setId(i+1);
getMenu(model,files,tar[i]);
list.add(model);
}
System.out.println(pasList(list));
}
public static void getMenu(Model model,Map<String,Integer> map,String menu){
String[] key = menu.split("/");
if(key.length==1){
model.setPid(0);
model.setTarget(key[0]);
}else {
String parent = "";
model.setTarget(key[key.length-1]);
for(int i=0;i<key.length-1;i++){
parent+=(key[i]+"/");
}
model.setPid(map.get(parent));
}
if(menu.endsWith("/"))
map.put(menu,model.getId());
}
public static String pasList(List<Model> list){
String ss = "[";
for(Model model:list){
ss+=model.toString()+",";
}
return ss.substring(1,ss.length()-1)+"]";
}
}
class Model{
private int id;
private int pid;
private String target;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
public String getTarget() {
return target;
}
public void setTarget(String target) {
this.target = target;
}
@Override
public String toString() {
return "[" +
id +
"," + pid +
",\"" + target + '\"' +
']';
}
}
shayebuhui0 2018-04-26
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public class Test {
static Map<String,Integer> hash = new HashMap<String,Integer>();
static List<TmpObject> list = new ArrayList<TmpObject>();
public static void main(String[] args){
String s="jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
String[] arr = s.split(",");
for(String tmp : arr){
Integer root_id = 0;
String [] tarr = tmp.split("/");
for(String name: tarr){
root_id = findOrCreateRoot(name,root_id);
}
}
System.out.println(Arrays.toString(list.toArray()));
}
public static Integer findOrCreateRoot(String name,Integer root_id){
Integer id = hash.get(name+root_id);
if(null == id){
TmpObject t = new TmpObject();
t.setId(list.size() + 1);
t.setName(name);
t.setRoot_id(root_id);
id = t.getId();
list.add(t);
hash.put(t.getName()+root_id, t.getId());
}
return id;
}
}
public class TmpObject {
private Integer id;
private Integer root_id;
private String name;
public TmpObject(){
this.root_id = 0;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getRoot_id() {
return root_id;
}
public void setRoot_id(Integer root_id) {
this.root_id = root_id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String toString() {
return "["+this.id+","+this.root_id+",\""+this.name+"\"]";
}
}
jian_j_z 2018-04-25
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同问，输出好像是有问题的？
reyoreyoreyo 2018-04-25
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<!DOCTYPE html>
<html>
<head>
<title></title>
<style>
textarea{
font-size: 16px;
outline: none;
border-radius: 5px;
border:1px solid #ccc;
width: 50%;
height: 80px;
}
.button{
width: 60px;
height: 30px;
line-height: 30px;
text-align: center;
border-radius: 5px;
border: 1px solid #ccc;
cursor: pointer;
font-size: 13px;
}
.button:hover{
background: #eee;
}
</style>
</head>
<body>
<textarea id="text"></textarea>
<div class="button" onclick="analysis()">解析</div>
<div id="result"></div>
<script>
// const s="jar.bat,temp/,temp/aa/,temp/jar.bat,temp/rr.txt,temp/aa/44.txt,temp/aa/bb/";
const s="1.zip(1002.00B),1/jar.bat(26.00B),1/temp/jar.bat(26.00B),1/temp/rr.txt(0 B),1/temp/aa/44.txt(0 B)";
document.querySelector('#text').value = s;
function analysis(){
let text = document.querySelector('#text').value;
let arr = text.split(','),//将源字符串以逗号隔开,转换成数组
result = [];//最终输出的结果集
/** 遍历转换的数组 **/
for(var i in arr){
var tempArr = arr[i].split('/'),//将数组的每一项用斜杠拆分
len = tempArr.length;//每一项拆分后数组的长度
if(len > 1){//如果长度大于1，表示有二级或以上目录
for(var k in tempArr){
k = k * 1;//乘以1是将k转化成数字
//查找最终数组中是否已经存在当前项(tempArr[k - 1]表示取上一个“/”中的内容，即父及目录)
let aa = result.find(function(x){return x[2]==tempArr[k - 1]});
//存在，则该项的父及id就是上一个目录的id，不存在，则默认为0
let parentId = aa ? aa[0] : 0;
if(tempArr[k]){//该判断是为了防止空数据出现，比如:temp/，以斜杠拆分后边就多了个空字符串
//如果当前项名称(tempArr[k])跟最终结果的名称相同，并且父及id也相同，则判定重复
var repeatList = result.find(function(x){return x[2]==tempArr[k] && x[1]==parentId})
//如果不重复,则添加到最终的结果集中
!repeatList && result.push([result.length + 1,parentId,tempArr[k]]);
}
}
}else{//只有一级目录，直接添加到结果集
result.push([result.length + 1,0,tempArr[0]]);
}
}
result = JSON.stringify(result);
let html = `<p>源字符串：${text}</p><p>输出结果：${result}</p>`;
document.querySelector('#result').innerHTML = html;
}
</script>
</body>
</html>
reyoreyoreyo 2018-04-25
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java 混合list不可能实现，望高手出手相助
reyoreyoreyo 2018-04-24
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这个看个人的算法，排序方法 不一样 序号不一样
shayebuhui0 2018-04-24
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为什么第三个输出的是 [3,2,"jar.bat"] 而不是[3,2,"aa"]