Question

我想从网址导入xml文件。

我的代码是：

URL url = new URL(partnersEntity.getUrl());

            URLConnection urlConnection = url.openConnection();
            urlConnection.setReadTimeout(55000);


            File file = new File(fileURL);


            FileWriter writer = new FileWriter(file);

            IOUtils.copy(urlConnection.getInputStream(), writer);

问题是，XML文件有60000行，但我的导出只保存了11000行。

问题出在哪里？

我可以设置内容长度吗？

Answer 1

所有输入输出对象都是应该关闭的资源，否则您将有资源泄漏或丢失未刷新的缓冲区（您的情况）。它应该在try-finally块中完成。对于您的场景：

URL url = new URL(partnersEntity.getUrl());
URLConnection urlConnection = url.openConnection();
urlConnection.setReadTimeout(55000);

InputStream is = urlConnection.getInputStream();    
try
{
    File file = new File(fileURL);
    FileWriter writer = new FileWriter(file);
    try
    {
        IOUtils.copy(is, writer);
    }
    finally
    {
        IOUtils.closeQuietly(writer);
    }
}
finally
{
    IOUtils.closeQuietly(is);
}

在Java 7中，您可以使用新的try-syntax：

URL url = new URL(partnersEntity.getUrl());
URLConnection urlConnection = url.openConnection();
urlConnection.setReadTimeout(55000);


File file = new File(fileURL);

try(
    InputStream is = urlConnection.getInputStream();
    FileWriter writer = new FileWriter(file);
)
{
    IOUtils.copy(is, writer);
}

OpenConnection不会导入完整内容

1 个答案: