每天多一点之字符流、java压缩文件

package com.demo.zip;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

/**
*
* @Description 测试zip压缩
* @author HackerD
* @version 1.0
* @CreateAt 2013-5-22 下午4:11:09
*/
public class TestZipFile {
private int[] no = { 1, 3, 4, 5, 7, 9, 12 };
private double[] scores = { 77.4, 67.5, 88.3, 78.8, 98.5, 78.4, 76.4 };

/**
*
* @Description 将人数学号成绩按照格式：人数-学号1;学号2...-成绩1;成绩2... 写入文本文件
* @author HackerD
* @CreateAt   2013-5-22 下午7:40:49
* @version V1.0
* @ModificationHistory<BR>
* Date         Author       Version      Description <BR>
* ----------------------------------------------
*
*/
public void writeData() {
FileWriter fw = null;
BufferedWriter bfw = null;
try {
fw = new FileWriter("Score.txt");
bfw = new BufferedWriter(fw);
String noStr = "";
String scoreStr = "";
// 拼凑学号跟成绩
for (int i = 0; i < no.length; i++) {
noStr += no[i] + ";";
scoreStr += scores[i] + ";";
}
// 写入文件
bfw.write(no.length + "-" + noStr.substring(0, noStr.length() - 1)
+ "-" + scoreStr.substring(0, scoreStr.length() - 1));
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
bfw.close();
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

/**
*
* @Description 根据写入的格式从Score.txt中找出最高成绩和对应学号
* @author HackerD
* @CreateAt   2013-5-22 下午7:41:01
* @version V1.0
* @ModificationHistory<BR>
* Date         Author       Version      Description <BR>
* ----------------------------------------------
*
*/
public void findMaxScore() {
FileReader fr = null;
BufferedReader bfr = null;
String info = "";
String temp = "";
double maxScore = 0;
int pos = 0;
try {
fr = new FileReader("Score.txt");
bfr = new BufferedReader(fr);

// 读取信息存放在info中
while ((temp = bfr.readLine()) != null) {
info += temp;
}

// 拆分信息
String[] infoarr = info.split("-");
// 拆分出成绩
String[] scores = infoarr[2].split(";");
// 拆分出学号
String[] no = infoarr[1].split(";");

// 找出最高成绩
for (int i = 0; i < scores.length; i++) {
if (Double.parseDouble(scores[i]) > maxScore) {
maxScore = Double.parseDouble(scores[i]);
pos = i;
}
}
// 打印结果
System.out.println("最高成绩为:" + maxScore + ";学号为:" + no[pos]);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
bfr.close();
fr.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

/**
*
* @Description 将Score.txt压缩Score.zip
* @author HackerD
* @CreateAt   2013-5-22 下午7:41:13
* @version V1.0
* @ModificationHistory<BR>
* Date         Author       Version      Description <BR>
* ----------------------------------------------
*
*/
public void scoreZip() {
try {
InputStream is = new FileInputStream("Score.txt");
OutputStream os = new FileOutputStream("Score.zip");
ZipOutputStream zf = new ZipOutputStream(os);
// 添加条目
zf.putNextEntry(new ZipEntry("Score.txt"));

int n = 0;
// 写入压缩包
while ((n = is.read()) != -1) {
zf.write(n);
}

zf.close();
os.close();
is.close();
} catch (Exception e) {
e.printStackTrace();
}
}

/**
*
* @Description 将Socre.zip解压到test文件夹里
* @author HackerD
* @CreateAt   2013-5-22 下午7:41:25
* @version V1.0
* @ModificationHistory<BR>
* Date         Author       Version      Description <BR>
* ----------------------------------------------
*
*/
public void scoreUnzip() {
try {
ZipFile zf = new ZipFile("Score.zip");
// 返回指定 ZIP 文件条目。
ZipEntry zEntry = zf.getEntry("Score.txt");
// 返回输入流以读取指定 ZIP 文件条目的内容。
InputStream is = zf.getInputStream(zEntry);
OutputStream os = new FileOutputStream("test/Score.txt");
int n = 0;
// 解压
while ((n = is.read()) != -1) {
os.write(n);
}

os.close();
is.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
TestZipFile testZipFile = new TestZipFile();
testZipFile.writeData();
testZipFile.findMaxScore();
testZipFile.scoreZip();
testZipFile.scoreUnzip();
}

}