我有一个div，它将存储从JSON
解析的DB中的值<div id='nsnt' class="huge"> </div>
我有一个getdata.php来自mysqldb的getdata
访问getdata.php
<?php
$objConnect = mysql_connect("localhost","xxxxxx","xxxxx") or die(mysql_error());
$objDB = mysql_select_db("musicstore");
$strSQL = "SELECT count(song_id) as cnt FROM song ";
$objQuery = mysql_query($strSQL) or die (mysql_error());
$intNumField = mysql_num_fields($objQuery);
$resultArray = array();
while($obResult = mysql_fetch_array($objQuery))
{
$arrCol = array();
for($i=0;$i<$intNumField;$i++)
{
$arrCol[mysql_field_name($objQuery,$i)] = $obResult[$i];
}
array_push($resultArray,$arrCol);
}
mysql_close($objConnect);
echo json_encode($resultArray);
?>
我在$ resultArray上使用var_dump它完全返回数据
在我的index.php上我有一个jQuery函数从getdata.php返回数据并在<div id='nsnt' class="huge"> </div>上显示这样
<script>
function getDataFromDb()
{
$.ajax({
url: "~/getdata.php" ,
type: "POST",
data: ''
})
.success(function(result) {
var obj = jQuery.parseJSON(result);
if(obj != '')
{
//$("#myTable tbody tr:not(:first-child)").remove();
$("#nsnt").empty();
$.each(obj, function(key, val) {
var m = val["cnt"];
$('#nsnt').append( m );
});
}
}
setInterval(getDataFromDb, 1000); // 1000 = 1 second
</script>
它不会返回任何内容
答案 0 :(得分：1)
我认为Success应该是ajax属性之一，否则请使用} else if (line.startsWith("go ")) {
String dir = line.substring(3);
Room next = current.getNextRoom(dir);
if (next == null) {
System.out.println("You cannot go " + dir + " from here.");
} else {
if (next.isLocked() && inventory.contains(next.requiredKey())) {
current = next;
System.out.println("You use the " + next.requiredKey() + " to unlock the next room...");
current.describe();
} else if (next.isLocked()) {
System.out.println("That room is locked and you don't have the required key");
} else {
current = next;
current.describe();
}
}
} else if (line.startsWith("take ")) {
，试试这个：
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Game {
private Room yard;
private Room frontdoor;
private Room hallway;
private Room bathroom;
private Room lounge;
private Room kitchen;
private Room bedroom;
private Room basementdoor;
private Room basement;
private Room exit;
private Room current;
//create an inventory
private ArrayList<String> inventory = new ArrayList<String>();
public Game() {
yard = new Room("You're standing in open area.\n"
+ "There is a house to the north.\n");
frontdoor = new Room("You come to an old timber door, but it's locked.\n"
+ "There's a key on the ground. Talk about security...\n"
+ "There's a yard to the south.\n");
frontdoor.setKey("Front door key");
hallway = new Room("A hall stretches out into darkness.\n"
+ "There is a small flicker of light to the North.\n"
+ "There's a faint dripping sound to the west"
+ "There's a strange smell comming from the east");
bathroom = new Room("You enter what looks like a bathroom. It doesn't look like anyones cleaned it it months.\n"
+ "There's four numbers scratched into the wall - '1517'.\n"
+ "The hall is to the east.");
kitchen = new Room("You come into a kitchen, there's moldy food still in grocery bags on the bench.\n"
+ "You see a sandwhich and pick it up to investigate. Fortunately it looks fresh, and you're pretty hungry.\n"
+ "The hall is back to the west.");
kitchen.addItem("Mouldy Sandwhich?");
lounge = new Room("You come to a dimly lit loungeroom.\n"
+ "The couches have been toppled over, a book case lies fallen on the floor. The embers are still hot and flickering in the fireplace.\n"
+ "There's a door on the western wall.");
bedroom = new Room("You walk into a bedroom.\n"
+ "There's snoring comming from a huddled lump on the bed. Better be quiet.\n"
+ "There's a large metal door on the southern wall");
basementdoor = new Room("There's no breaking through this thing, it's too solid.\n"
+ "There's a small keypad next to the door. Hmm?\n");
basement = new Room("The code unlocks the door. You climb down a dimly lit staircase into what looks like a basement.\n"
+ "Suddenly, you hear some yelling from upstairs and some footsteps making their way down the staircase!\n"
+ "There's a window to north, quick!\n");
exit = new Room("You crawl through the window, out into the open and run down the street.\n"
+ "Why did you even go into that house in first place?\n");
current = yard;
//Connect the rooms
yard.connectNorth(frontdoor);
frontdoor.connectNorth(hallway);
hallway.connectNorth(lounge);
hallway.connectWest(bathroom);
kitchen.connectWest(hallway);
lounge.connectWest(bedroom);
basementdoor.connectNorth(bedroom);
basement.connectNorth(basementdoor);
basement.connectNorth(exit);
}
/**
* Play the interactive text game.
*
* Reads commands from the given input, line by line.
*
* @param in
*/
private void take(String item) {
if (current.contains(item) == true) {
current.removeItem(item); // can't get this to work
inventory.add(item);
System.out.println("You picked up the " + item + "and stashed it away");
} else {
System.out.println("Unknown object '" + item + "'.");
}
}
private void drop(String item) {
if (current.contains(item) == true) {
inventory.remove(item);
current.addItem(item); // or this
System.out.println("You dropped the " + item + "and left it in the " + current);
} else {
System.out.println("Unknown object '" + item + "'.");
}
}
public void play(Scanner in) {
current.describe();
while (current != exit) {
String line = in.nextLine().toLowerCase();
if (line.equals("quit")) {
System.out.println("You gave up!");
break;
} else if (line.startsWith("go ")) {
String dir = line.substring(3);
Room next = current.getNextRoom(dir);
if (next == null) {
System.out.println("You cannot go " + dir + " from here.");
} else {
if (next.isLocked() && inventory.contains(next.requiredKey())) {
current = next;
System.out.println("You use the " + next.requiredKey() + " to unlock the next room...");
current.describe();
} else if (next.isLocked()) {
System.out.println("That room is locked and you don't have the required key");
} else {
current = next;
current.describe();
}
}
} else if (line.startsWith("take ")) {
take(line.substring(5));
} else if (line.startsWith("print inventory")) {
System.out.print(inventory);
} else {
System.out.println("Unknown command '" + line + "'. Try go/take/quit.");
}
}
}
/**
* Starts the whole game.
*/
public static void main(String[] args) {
Game game = new Game();
game.play(new Scanner(System.in));
}
public class Room {
private String description;
private Room north;
private Room east;
private Room south;
private Room west;
//add a list of empty items to each room
private ArrayList<String> items = new ArrayList<>();
private String key; //null means no key
public Room(String desc) {
description = desc;
}
public void setKey(String key) {
this.key = key;
}
/**
* Connect the west exit of this room to the 'other' room. It automatically
* makes the connection in both directions.
*
* @param other
*/
public void connectWest(Room other) {
this.west = other;
other.east = this;
}
public void connectNorth(Room other) {
this.north = other;
other.south = this;
}
/**
* Prints a description of this room and its contents.
*/
public void describe() {
final StringBuilder itemsString = new StringBuilder("");
for (String item : items) {
itemsString.append(" ").append(item);
}
System.out.println(itemsString.toString());
System.out.println(description);
}
public boolean isLocked() {
return key != null;
}
public String requiredKey() {
return key;
}
/**
* Try to move in the given direction from this room.
*
* @param dir Should be "north", "east", "south" or "west".
* @return the new room.
*/
public Room getNextRoom(String dir) {
Room nextRoom = null;
if (dir.equals("north")) {
nextRoom = north;
} else if (dir.equals("east")) {
nextRoom = east;
} else if (dir.equals("south")) {
nextRoom = south;
} else if (dir.equals("west")) {
nextRoom = west;
} else {
System.out.println("Error: unknown direction " + dir);
}
return nextRoom;
}
public boolean contains(String item) {
return items.contains(item);
}
public void addItem(String item) {
items.add(item);
}
public void removeItem(String item) {
items.remove(item);
}
}
}
或
.done()