java - 系统资源不足，无法完成请求的服务

Question

尝试使用下载大数据时出现上述错误HttpGet

String uri = "";
getMethod = executeGet(uri);
httpClient.executeMethod(getMethod);
InputStream istream  = getMethod.getResponseBodyAsStream();
byte[] data = IOUtils.toByteArray(istream);
FileUtils.writeByteArraytoFile(new  File("xxx.zip"),data)

Answer 1

您正在使用可能是问题原因的临时字节数组。您可以直接将流的内容写入文件。

String uri = "";
getMethod = executeGet(uri);
httpClient.executeMethod(getMethod);
InputStream istream  = getMethod.getResponseBodyAsStream();
IOUtils.copy(istream, new FileOutputStream(new  File("xxx.zip"));

Answer 2

您正在将整个响应读入byte[]（内存）。相反，您可以在读取输出时流式传输输出，istream例如，

File f = new  File("xxx.zip");
try (OutputStream os = new BufferedOutputStream(new FileOutputStream(f));) {
    int c = -1;
    while ((c = istream.read()) != -1) {
        os.write(c);
    }
} catch (Exception e) {
    e.printStackTrace();
}