PROGRAMMING
Php
Ajax App
Create a new Spring Web project.
package com.example.ajaxapp;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
... 3 lines 
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
document.addEventListener('DOMContentLoaded', function() {
function crono() {
setTimeout(function() {
$.ajax({
url: "http://localhost:8080/getcurrtime"
}).then(function(data){
$("#crono").html(data.time);
});
crono();
}, 1000);
}
crono();
});
function start() {
$.ajax({
url: "http://localhost:8080/start"
});
}
function stop() {
$.ajax({
url: "http://localhost:8080/stop"
});
}
</script>
</head>
<body>
Get current time (with Ajax):
<a href='javascript: start();'>Start</a> |
<a href='javascript: stop();'>Stop</a>
<div id='crono'></div>
</body>
</html>
package com.example.ajaxapp;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class CronoController {
private Boolean start = true;
private SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
private String lastTime = dateFormat.format(new Date());
@GetMapping("/getcurrtime")
public Crono crono() {
if (start) {
String time = dateFormat.format(new Date());
lastTime = time;
}
return new Crono(lastTime);
}
@GetMapping("/start")
public void start() {
this.start = true;
}
@GetMapping("/stop")
public void stop() {
this.start = false;
}
}
/**
* Data representation class (to return as JSON)
*/
class Crono {
private final String time;
public Crono(String time) {
this.time = time;
}
public String getTime() {
return time;
}
}
... 33 lines
./mvnw spring-boot:run
http://localhost:8080/
#15:56:30
➥ Questions
