inputstream输出为String

import java.io.IOException; 
import java.io.InputStream;
import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

    public void test() throws ClientProtocolException, IOException{
        RequestConfig config = RequestConfig.custom()
                .setConnectionRequestTimeout(40000).setConnectTimeout(40000)
                .setSocketTimeout(40000).build();
        
        HttpGet httpGet = new HttpGet("http://iphone.myzaker.com/zaker/article_telecom.php?app_id=1&for=delong");
        
        httpGet.setConfig(config);
        
        CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(null).build();//设置进去
        
        HttpClients.createDefault();
        
        CloseableHttpResponse  response = null;
        response = httpClient.execute(httpGet); 
        
        HttpEntity entity = response.getEntity();
        InputStream in =  entity.getContent();
        // 开始读取内容
        StringBuffer out = new StringBuffer();  
        byte[] b = new byte[4096];  
        for (int n; (n = in.read(b)) != -1;) {  
            out.append(new String(b, 0, n));  
        }  
    }