文件操作(全类型通用)

布满荆棘的人生 2022-05-23 11:53 206阅读 0赞

**下载**

import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.OutputStream;
    
    
    import com.common.Parse_HtmlContentType;
    
    public class DownloadFileUtil {
    	
    	private String filePath;
    	private String fileName;
    	private HttpServletResponse response;
    	private HttpServletRequest request;
    	private String fileExtensions;
    	private byte [] b;
    
    	private DownloadFileUtil(){}
    	
    	/**
    	 * 带有参数的构造方法(下载文件)
    	 * 
    	 * filepath为文件路径
    	 * filename 下载到本地后的名称
    	 * response
    	 * @param filePath
    	 * @param fileName
    	 * @param response
    	 */
    	private DownloadFileUtil(String filePath,String fileName,HttpServletResponse response,HttpServletRequest request){
    		this.filePath=filePath;
    		this.fileName=fileName;
    		this.response=response;
    		this.request = request;
    		this.fileExtensions=fileName.substring(fileName.lastIndexOf(".")+1);
    	}
    	
    	public static void downloadFile(String filePath,String fileName,HttpServletResponse response,HttpServletRequest request) throws FileNotFoundException,IOException {
    		// filename= 123.doc
    		DownloadFileUtil downloadFileUtil = new DownloadFileUtil(filePath,fileName,response,request);
    		downloadFileUtil.generateBytes();
    		downloadFileUtil.downLoad();
    	}
    	
    	private void generateBytes() throws FileNotFoundException,IOException{
    		FileInputStream fis = new FileInputStream(filePath);
    		b = new byte[fis.available()];
    		fis.read(b);
    		fis.close();
    	}
    
    	private void downLoad() throws IOException{
    		String agent = request.getHeader("User-Agent").toLowerCase();  
    		if (agent.indexOf("firefox") >0)
    			fileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");//firefox浏览器
    		else if (agent != null && (agent.indexOf("msie") != -1 || (agent.indexOf("rv") != -1 && agent.indexOf("firefox") == -1)))
    			fileName = java.net.URLEncoder.encode(fileName, "UTF-8");//IE浏览器
    		else
    			fileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");
    		response.reset();
    		String contentType = Parse_HtmlContentType.getValue(fileExtensions);
    		response.setContentType(contentType);
    		//String fileNameNew =fileName.replaceAll(" ", "_");
    		response.addHeader("Content-Disposition","attachment;filename=\""+ fileName+"\"");
    		
    		OutputStream out = response.getOutputStream();
    		out.write(b);
    		out.close();		
    	}	
    }

Parse_HtmlContentType.java

import java.io.BufferedInputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.Properties;
    
    /*
     *解析Html内容类型 
     */
    public class Parse_HtmlContentType {
    
    	
    	private Parse_HtmlContentType(){
    	};
    	
    	private static final String htmlContentTypeFile =  (File.separator+"htmlContentType.properties");
    	
    	private static Properties p;
    	
    	private static Parse_HtmlContentType instance ;
    	
    	public String path = this.getClass().getResource("/").getPath();
    	
    	public static String getValue(String name) throws IOException{
    		
    		if(instance == null){
    			instance = new Parse_HtmlContentType();
    			InputStream in = new BufferedInputStream(new FileInputStream(instance.path+htmlContentTypeFile));
    			p = new Properties();
    			p.load(in);
    		}
    		String value = p.getProperty(name);
    		return value==null?p.getProperty("html"):value;
    	}
    	
    }

htmlContentType.properties

ez=application/andrew-inset
    hqx=application/mac-binhex40
    cpt=application/mac-compactpro
    mathml=application/mathml+xml
    doc=application/msword
    bin=application/octet-stream
    dms=application/octet-streamlha
    lzh=application/octet-streamexe
    class=application/octet-stream
    so=application/octet-stream
    dll=application/octet-stream
    oda=application/oda
    ogg=application/ogg
    pdf=application/pdf
    ai=application/postscript
    eps=application/postscript
    ps=application/postscript
    rdf=application/rdf+xml
    smil=application/smil
    smi=application/smil
    gram=application/srgs
    grxml=application/srgs+xml
    mif=application/vnd.mif
    xul=application/vnd.mozilla.xul+xml
    xls=application/vnd.ms-excel
    ppt=application/vnd.ms-powerpoint
    wbxml=application/vnd.wap.wbxml
    wmlc=application/vnd.wap.wmlc
    wmlsc=application/vnd.wap.wmlscriptc
    vxml=application/voicexml+xml
    bcpio=application/x-bcpio
    vcd=application/x-cdlink
    pgn=application/x-chess-pgn
    cpio=application/x-cpio
    csh=application/x-csh
    dcr=application/x-director
    dir=application/x-director
    dxr=application/x-director
    dvi=application/x-dvi
    spl=application/x-futuresplash
    gtar=application/x-gtar
    hdf=application/x-hdf
    php=application/x-httpd-php
    php4=application/x-httpd-php
    php3=application/x-httpd-php
    phtml=application/x-httpd-php
    phps=application/x-httpd-php-source
    js=application/x-javascript
    skp=application/x-koan
    skd=application/x-koan
    skt=application/x-koan
    skm=application/x-koan
    latex=application/x-latex
    cdf=application/x-netcdf
    nc=application/x-netcdf
    crl=application/x-pkcs7-crl
    sh=application/x-sh
    shar=application/x-shar
    swf=application/x-shockwave-flash
    sit=application/x-stuffit
    sv4cpio=application/x-sv4cpio
    sv4crc=application/x-sv4crc
    tgz=application/x-tar
    tar=application/x-tar
    tcl=application/x-tcl
    tex=application/x-tex
    texinfo=application/x-texinfo
    texi=application/x-texinfo
    t=application/x-troff
    tr=application/x-troff
    roff=application/x-troff
    man=application/x-troff-man
    me=application/x-troff-me
    ms=application/x-troff-ms
    ustar=application/x-ustar
    src=application/x-wais-source
    crt=application/x-x509-ca-cert
    xhtml=application/xhtml+xml
    xht=application/xhtml+xml
    xml=application/xml
    xsl=application/xml
    dtd=application/xml-dtd
    xslt=application/xslt+xml
    zip=application/zip
    au=audio/basic
    snd=audio/basic
    mid=audio/midi
    midi=audio/midi
    kar=audio/midi
    mpga=audio/mpeg
    mp2=audio/mpeg
    mp3=audio/mpeg
    aif=audio/x-aiff
    aiff=audio/x-aiff
    aifc=audio/x-aiff
    m3u=audio/x-mpegurl
    ram=audio/x-pn-realaudio
    rm=audio/x-pn-realaudio
    rpm=audio/x-pn-realaudio-plugin
    ra=audio/x-realaudio
    wav=audio/x-wav
    pdb=chemical/x-pdb
    xyz=chemical/x-xyz
    bmp=image/bmp
    cgm=image/cgm
    gif=image/gif
    ief=image/ief
    jpeg=image/jpeg
    jpg=image/jpeg
    jpe=image/jpeg
    png=image/png
    svg=image/svg+xml
    tiff=image/tiff
    tif=image/tiff
    djvu=image/vnd.djvu
    djv=image/vnd.djvu
    wbmp=image/vnd.wap.wbmp
    ras=image/x-cmu-raster
    ico=image/x-icon
    pnm=image/x-portable-anymap
    pbm=image/x-portable-bitmap
    pgm=image/x-portable-graymap
    ppm=image/x-portable-pixmap
    rgb=image/x-rgb
    xbm=image/x-xbitmap
    xpm=image/x-xpixmap
    xwd=image/x-xwindowdump
    igs=model/iges
    iges=model/iges
    msh=model/mesh
    mesh=model/mesh
    silo=model/mesh
    wrl=model/vrml
    vrml=model/vrml
    ics=text/calendar
    ifb=text/calendar
    css=text/css
    shtml=text/html
    html=text/html
    htm=text/html
    asc=text/plain
    txt=text/plain
    rtx=text/richtext
    rtf=text/rtf
    sgml=text/sgml
    sgm=text/sgml
    tsv=text/tab-separated-values
    wml=text/vnd.wap.wml
    wmls=text/vnd.wap.wmlscript
    etx=text/x-setext
    mpeg=video/mpeg
    mpg=video/mpeg
    mpe=video/mpeg
    qt=video/quicktime
    mov=video/quicktime
    mxu=video/vnd.mpegurl
    avi=video/x-msvideo
    movie=video/x-sgi-movie
    ice=x-conference/x-cooltalk