这个线程怎么返回数据？

Question

action：
public String dWeather() {
WeatherThreadTask weatherThreadTask=new WeatherThreadTask(ip);
weatherThreadPool.execute(weatherThreadTask);
System.err.println(weatherThreadTask.getWeatherInfo());
return "dwea";
}

线程类：
class WeatherThreadTask implements Runnable,Serializable{

private static final long serialVersionUID = 1L;

protected String ip;

private WeatherInfo weatherInfo;

public WeatherInfo getWeatherInfo() {
    return weatherInfo;
}

public void setWeatherInfo(WeatherInfo weatherInfo) {
    this.weatherInfo = weatherInfo;
}

public WeatherThreadTask(String ip){
    this.ip=ip;
}

public void run() {
    try{
        IWeatherPlugin plugin=PluginManager.getWeatherPlugin();
        WeatherInfo weatherinfo=plugin.getToday(ip);
        setWeatherInfo(weatherinfo);
    }catch(Exception e){
        e.printStackTrace();
    }
}

}

我想在action获取weatherinfo数据？
怎么做？

Answer 1

1、将WeatherThreadTask 实现Callable接口
class WeatherThreadTask implements Callable,Serializable{

private static final long serialVersionUID = 1L; 

protected String ip; 
private WeatherInfo weatherInfo; 

public WeatherInfo getWeatherInfo() { 
return weatherInfo; 
} 

public void setWeatherInfo(WeatherInfo weatherInfo) { 
this.weatherInfo = weatherInfo; 
} 


public WeatherThreadTask(String ip){ 
this.ip=ip; 
} 

public Object call() throws Exception {
    WeatherInfo weatherinfo=null;
    try{ 
        IWeatherPlugin plugin=PluginManager.getWeatherPlugin(); 
        =plugin.getToday(ip); 
        setWeatherInfo(weatherinfo); 
        }catch(Exception e){ 
        e.printStackTrace(); 
        } 
    return weatherinfo;
} 

}

2、main方法调用
public static void main(String[] args) {
WeatherThreadTask wt=new WeatherThreadTask("");
ExecutorService es=Executors.newCachedThreadPool();
Future future=es.submit(wt);
WeatherInfo info=future.get();
}