使用java实现在文件中添加字符串
2008-01-05 08:29:01 来源:WEB开发网import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
public class FileWriterTest {
public static void main(String[] args) {
FileOutputStream stream ;
OutputStreamWriter writer;
try {
//主要是使用了FileOutputStream的构造函数FileOutputStream(File file, boolean append)
//这里参数append为true表示可以添加,具体使用参考JDK帮助文档资料.
stream = new FileOutputStream("C:\\WINDOWS\\system32\\drivers\\etc\\hosts", true);
writer = new OutputStreamWriter(stream);
writer.write("202.206.219.246 rsgl_dbserve");
writer.close();
stream.close();
} catch (IOException e) {
e.PRintStackTrace();
}
}
}
以上代码在eclipse上调试成功!
为了增加代码的重用性,可以编写一个方法如下:
public void appendToFile(String str, String filename) throws Exception
{
// Open up an outputstreamwriter to the file, and append str to it.
FileOutputStream stream;//provides file access
OutputStreamWriter writer;//writes to the file
try
{
stream = new FileOutputStream(filename, true);
writer = new OutputStreamWriter(stream);
writer.write(str);
writer.close();
stream.close();
}
catch(Exception e)
{
throw e;
}
}//appendToFile
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