//壓縮文件(防止中文亂碼----使用apache的ZipOutputStream包)
private static void writeZip(String[] strs,String zipname,String temppath) throws IOException {
String[] files = strs;
OutputStream os = new BufferedOutputStream(new FileOutputStream(temppath+"//"+zipname));
ZipOutputStream zos = new ZipOutputStream(os);
byte[] buf = new byte[8192];
int len;
for (int i=0;i<files.length;i++) {
File file = new File(files[i]);
if ( !file.isFile() ) continue;
ZipEntry ze = new ZipEntry( file.getName() );
zos.putNextEntry(ze);
BufferedInputStream bis = new BufferedInputStream( new FileInputStream( file ) );
while ( ( len = bis.read( buf ) ) > 0 ) {
zos.write( buf, 0, len );
}
zos.closeEntry();
bis.close();
}
zos.setEncoding("GBK");
for(int i=0;i<files.length;i++){
File file= new File(files[i]);
file.delete();
}
zos.closeEntry();
zos.close();
os.close();
}
/**
* 遞歸查找文件
* @param baseDirName 查找的文件夾路徑
* @param targetFileName 需要查找的文件名
* @param fileList 查找到的文件集合
*/
public static void findFiles(String baseDirName, String targetFileName, List fileList) {
File baseDir = new File(baseDirName); // 創建一個File對象
if (!baseDir.exists() || !baseDir.isDirectory()) { // 判斷目錄是否存在
System.out.println("文件查找失敗:" + baseDirName + "不是一個目錄!");
}
String tempName = null;
//判斷目錄是否存在
File tempFile;
File[] files = baseDir.listFiles();
for (int i = 0; i < files.length; i++) {
tempFile = files[i];
if(tempFile.isDirectory()){
findFiles(tempFile.getAbsolutePath(), targetFileName, fileList);
}else if(tempFile.isFile()){
tempName = tempFile.getName();
if(wildcardMatch(targetFileName, tempName)){
// 匹配成功,將文件名添加到結果集
fileList.add(tempFile.getAbsoluteFile());
}
}
}
}
/**
* 刪除zip
*/
public void deleteZip(String path) {
/* String[] sos = abpath.split("/");
String name = ss[ss.length - 1];
String path = abpath.replace("/" + name, "");*/
File file = new File(path);// 里面輸入特定目錄
File temp = null;
File[] filelist = file.listFiles();
for (int i = 0; i < filelist.length; i++) {
temp = filelist[i];
if (temp.getName().endsWith("zip"))// 獲得文件名,如果后綴為“”,這個你自己寫,就刪除文件
{
temp.delete();// 刪除文件}
}
}
}
導出zip
Date now = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss");//可以方便地修改日期格
String tm= dateFormat.format(new Date());
String zipname=tm+".zip";
writeZip(fils,zipname,temppath);//服務端生成zip文件
InputStream in = in = new FileInputStream(temppath+"//"+zipname); //獲取文件的流
OutputStream os = response.getOutputStream();
int len = 0;
byte buf[] = new byte[1024];//緩存作用
response.setCharacterEncoding("UTF-8");
response.setContentType("application/octet-stream; charset=UTF-8");
response.addHeader("Content-Disposition", "attachment; filename=\""+new String(zipname.getBytes("GB2312"),"ISO8859-1")+"\";");//
os = response.getOutputStream();//輸出流
while( (len = in.read(buf)) > 0 ) //切忌這后面不能加 分號 ”;“
{
os.write(buf, 0, len);//向客戶端輸出,實際是把數據存放在response中,然后web服務器再去response中讀取
}
in.close();
os.close();
deleteZip(temppath);//導出后刪除zip
/**
* 追加文件:使用FileWriter---寫入
*/
public static void appendMethodB(String fileName, StringBuffer content) {
try {
//打開一個寫文件器,構造函數中的第二個參數true表示以追加形式寫文件
FileWriter writer = new FileWriter(fileName, true);
/*OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(fileName, true),"UTF-8");
osw.write(content);
osw.close();*/
writer.write(content.toString());
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 功能:Java讀取txt文件的內容
* 步驟:1:先獲得文件句柄
* 2:獲得文件句柄當做是輸入一個字節碼流,需要對這個輸入流進行讀取
* 3:讀取到輸入流后,需要讀取生成字節流
* 4:一行一行的輸出。readline()。
* 備注:需要考慮的是異常情況
* @param filePath
*/
public static ArrayList<String> readTxtFile(String filePath){
ArrayList<String> readList = new ArrayList<String>();
try {
String encoding="GBK";
File file=new File(filePath);
if(file.isFile() && file.exists()){ //判斷文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file),encoding);//考慮到編碼格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while((lineTxt = bufferedReader.readLine()) != null){
readList.add(lineTxt);
}
read.close();
}else{
System.out.println("找不到指定的文件");
}
} catch (Exception e) {
System.out.println("讀取文件內容出錯");
e.printStackTrace();
}
return readList;
}