java指定路径写、读文件

package com.util;import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;/**
* @ClassName: IOUtill
* @Description: I/O工具类
* @author 无名
* @date 2016-5-20 下午9:00:18
* @version 1.0
 */
public final class IOUtill
{
    private IOUtill(){}    public static void writeByUrl(String url,String content)
    {
        File file = new File(url);
        if (!file.getParentFile().exists())
        {
           file.getParentFile().mkdirs();
        }
        try
        {
           file.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
           FileWriter fw = new FileWriter(file, true);
           BufferedWriter bw = new BufferedWriter(fw);
           bw.write(content);
           bw.flush();
           bw.close();
           fw.close();
        } catch (IOException e) {
           e.printStackTrace();
        }
    }    public static String readByUrl(String url)
    {
        File file = new File(url);
        if (!file.getParentFile().exists())
        {
           file.getParentFile().mkdirs();
        }
        String content = "";
        try
        {
            FileReader fr = new FileReader(file);
            BufferedReader br = new BufferedReader(fr);
            try
            {
                String line = br.readLine();
                content += line;
                while(line != null)
                {
                    line = br.readLine();
                    content += line;
                }
            }catch (IOException ex) {
                ex.printStackTrace();
            }
        }catch(FileNotFoundException e){
            e.printStackTrace();
        }
        return content;
    }
}