文件读取

package cn.test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.apache.commons.lang.StringUtils;

public class FileUtils {
	 public static final String TEMPLATE_PATH  = "c:\\FileUtils.java";
	 public static final String TEMPLATE_OUTPATH  = "c:\\out.txt";
	 public static final String TEMPLATE_INPATH  = "cn/test.txt";
	
	public  String getFileContent(String path,String charset){
		StringBuffer sb=new StringBuffer();
		String line;
		BufferedReader br=null;
		try {
			br=new BufferedReader(new InputStreamReader(new FileInputStream(path),charset));
			
			while((line=br.readLine())!=null){
				sb.append(line);
				sb.append("\n");
			}
		} catch (UnsupportedEncodingException e) {
			System.out.println("读取文件有误！");
			//e.printStackTrace();
		} catch (IOException e) {
			System.out.println("读取文件有误！");
			//e.printStackTrace();
		}finally{
			
			if(!StringUtils.isEmpty(br.toString())){
				try {
					br.close();
				} catch (IOException e) {
					System.out.println("关闭文件有误");
					e.printStackTrace();
				}
			}
			
		}
		
		return sb.toString();
		
	}
	public String fileReadToString(String path){
		StringBuffer sb=new StringBuffer();
		String line;
		BufferedReader br=null;
		try {
			//ClassLoader.getSystemResourceAsStream(path)中的path路径是类路径下的文件
			//如包cn下有test.txt文件，则路径是"cn/test.txt"。
			br=new BufferedReader(new InputStreamReader(ClassLoader.getSystemResourceAsStream(path),"UTF-8"));
			while((line=br.readLine())!=null){
				sb.append(line);
				sb.append("\n");
			}
		} catch (UnsupportedEncodingException e) {
			System.out.println("读取文件有误！");
			//e.printStackTrace();
		} catch (IOException e) {
			System.out.println("读取文件有误！");
			//e.printStackTrace();
		}finally{
			
			if(!StringUtils.isEmpty(br.toString())){
				try {
					br.close();
				} catch (IOException e) {
					System.out.println("关闭文件有误");
					e.printStackTrace();
				}
			}
			
		}
		
		return sb.toString();
	}
	
	public void stringWriteToTxt(String str,String path){
		BufferedWriter bw=null;
		try {
			bw=new BufferedWriter(new FileWriter(path));
			bw.write(str);
		} catch (IOException e) {
			System.out.println("写文件时有错误！");
			e.printStackTrace();
		}finally{
			if(bw!=null){
				try {
					bw.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
	}
	
	public static void main(String[] args) throws FileNotFoundException{
		FileUtils fileUtils=new FileUtils();
		String str=fileUtils.fileReadToString(TEMPLATE_INPATH);
		System.out.println(str);
		fileUtils.stringWriteToTxt(str, TEMPLATE_OUTPATH);
		File file=new File(TEMPLATE_OUTPATH);
		FileInputStream is=new FileInputStream(file);
		ClassLoader.getSystemResourceAsStream(TEMPLATE_INPATH);
		
	}
}

评论

1 楼 zy_zhangyuan88 2012-07-03  

发给对方过放电