对于使用java.net 包下的 HttpURLConnection获取图片流 下载图片,个别图片打开显示图片损坏的,可以使用 HttpClients工具类试试。代码如下。
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import java.io.*;
public class downimage {
public static void main(String[] args) throws Exception {
CloseableHttpClient httpClient = null;
InputStream inputStream = null;
File file = null;
try {
httpClient = HttpClients.createDefault();
HttpGet method = new HttpGet("http://d.lanrentuku.com/down/png/1807/10yuanshuiguo-png/if_apple_2003193.png");
HttpResponse result = httpClient.execute(method);
inputStream = result.getEntity().getContent();
//得到图片的二进制数据,以二进制封装得到数据,具有通用性
byte[] data = readInputStream(inputStream);
//new一个文件对象用来保存图片,默认保存当前工程根目录
File imageFile = new File("d://haha.png");
//创建输出流
FileOutputStream outStream = new FileOutputStream(imageFile);
//写入数据
outStream.write(data);
//关闭输出流
outStream.close();
} catch (IOException e) {
} finally {
try {
inputStream.close();
} catch (IOException e) {
}
try {
httpClient.close();
} catch (IOException e) {
}
}
}
public static byte[] readInputStream(InputStream inStream) throws Exception{
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
//创建一个Buffer字符串
byte[] buffer = new byte[1024];
//每次读取的字符串长度,如果为-1,代表全部读取完毕
int len = 0;
//使用一个输入流从buffer里把数据读取出来
while( (len=inStream.read(buffer)) != -1 ){
//用输出流往buffer里写入数据,中间参数代表从哪个位置开始读,len代表读取的长度
outStream.write(buffer, 0, len);
}
//关闭输入流
inStream.close();
//把outStream里的数据写入内存
return outStream.toByteArray();
}
}
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