读取写入文本文件

publicclassReadWriteFile{
publicBufferedReaderbufread;
publicBufferedWriterbufwriter;
Filewritefile;
Stringfilepath,filecontent,read;
StringreadStr="";
//从文本文件中读取内容
publicStringread(Stringpath)
{
try{
filepath=path;//得到文本文件的路径
Filefile=newFile(filepath);
FileReaderfileread=newFileReader(file);
bufread=newBufferedReader(fileread);
while((read=bufread.readLine())!=null){
read=read+"/r/n";
readStr=readStr+read;
}
}catch(Exceptiond){
System.out.println(d.getMessage());
}
returnreadStr;//返回从文本文件中读取内容
}
//向文本文件中写入内容
publicvoidwrite(Stringpath,Stringcontent,booleanappend){
try{
booleanaddStr=append;//通过这个对象来判断是否向文本文件中追加内容
filepath=path;//得到文本文件的路径
filecontent=content;//需要写入的内容
writefile=newFile(filepath);
if(writefile.exists()==false)//如果文本文件不存在则创建它
{
writefile.createNewFile();
writefile=newFile(filepath);//重新实例化
}
FileWriterfilewriter=newFileWriter(writefile,addStr);
//删除原有文件的内容
java.io.RandomAccessFilefile=newjava.io.RandomAccessFile(path,"rw");
file.setLength(0);
//写入新的文件内容
filewriter.write(filecontent);
filewriter.close();
filewriter.flush();
}catch(Exceptiond){
System.out.println(d.getMessage());
}
}
publicstaticvoidmain(String[]args)throwsException{
ReadWriteFilert=newReadWriteFile();
Stringfilecontent=rt.read("c:/test.xml");
rt.write("c:/test.xml",true);
}
}