java输入输出流读写文件

经常会用到输入输出流读写文件，所以就写了一个工具类，方法如下：

public static String readFile(String filePath){

String result="";

try{

FileReader fr=new FileReader(filePath);

char[] data=new char[1024];

int num=fr.read(data);

StringBuffer sb=new StringBuffer();

while(num!=-1){

String str=new String(data,0,num);

sb.append(str);

num=fr.read(data);

}

result=sb.toString();

}catch(IOException e){

System.out.println("读取文件失败");

}

 

return result;

}

public static boolean writeFile(String str,String filePath){

boolean result=true;

try{

//FileWriter fw=new FileWriter(filePath);

Writer fw = new OutputStreamWriter(new FileOutputStream (filePath),"UTF-8");

 

fw.write(str);

fw.close();

}catch(IOException e){

result=false;

System.out.println("写文件失败");

}

return result;

}