被MappedByteBuffer打开的文件只有在垃圾收集时才会被关闭,而这个点是不确定的。在javadoc里是这么说的:A mapped byte buffer and the file mapping that it represents remain valid until the buffer itself is garbage-collected. 这里提供一种解决方案: AccessController.doPrivileged(newPrivilegedAction() {publicObje...
我发现FileReader的编码为CP1252,即使文本为UTF-8编码也是如此。但是java.io.FileReader的JavaDoc说: 此类的构造函数假定默认字符编码和默认字节缓冲区大小是适当的。 这是否意味着如果我使用FileReader,则不需要我自己设置字符编码?但是我目前确实得到了错误的编码数据,应对情景的正确方法是什么?谢谢。
没有。BufferedReader.close()根据javadoc为BufferedReader和InputStreamReader 关闭流以及FileReader.close()做。 0 0 0 慕的地10843 正如其他人指出的那样,您只需要关闭外包装即可。BufferedReader reader = new BufferedReader(new FileReader(fileName));如果BufferedReader构造函数抛出异常(例如OutOfMemoryError),则...
根据javadoc为BufferedReader和InputStreamReader 关闭流
JDK1.1 See Also: InputStreamReader,FileInputStream Field Summary Fields inherited from class java.io.Reader lock Constructor Summary Constructors ConstructorDescription FileReader(Filefile) Creates a newFileReader, given theFileto read from. FileReader(FileDescriptorfd) ...
问如何修复读取csv文件时getCause指向空的FileReader错误？EN我用e.printStackTrace()替换了System.err....
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import java.io.BufferedReader; // Work with /File1 on the system eniac. AS400 system = new AS400("eniac"); IFSFile file = new IFSFile(system, "/File1"); BufferedReader reader = new BufferedReader(new IFSFileReader(file)); // Read the first line of the file, converting characters....
public class IFSFileReader extends java.io.Reader Convenience class for reading character files in the integrated file system. The behavior of this class is comparable to java.io.FileReader. IFSFileReader is meant for reading streams of characters. For reading streams of raw bytes, use IFSFileInp...