IO流输出图片 第二种兼容IOS

IO流输出图片

jsp直接转入路径

public void indexApp(@RequestParam("fileType")String fileType,

    @RequestParam("detailPath")String detailPath,HttpServletRequest request, HttpServletResponse response){

  String patht=configuration.getValue(fileType);//获取配置文件中图片的路径

  String path=patht+"/"+detailPath;

File file = new File(path);

        FileInputStream fis;

        try {

    fis = new FileInputStream(file);

    l file.length();

        byte[] temp = new byte[(int) size];

        fis.read(temp, 0, (int) size);

        fis.close();

        byte[] data = temp;

        response.setContentType("image/JPG");

        OutputStream out = response.getOutputStream();

        out.write(data);

        out.flush();

        out.close();

} catch (Exception e) {

// TODO Auto-generated catch block

System.out.println("++++++++++++++++系统找不到指定文件，文件路径是===》"+path);

}

      

}

第二种可兼容IOS

@RequestMapping(value="/getPicture")  

    public void indexApp(@RequestParam("fileType")String fileType,

    @RequestParam("detailPath")String detailPath,HttpServletRequest request, HttpServletResponse response){

try {  

detailPath = new String(detailPath.getBytes("ISO-8859-1"),"utf-8");

} catch (UnsupportedEncodingException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

String patht=null;

try {

patht= Configuration.getInstance().getValue(fileType);//获取配置文件中图片的路径

logger.error("图片路径="+patht);

}

catch (Exception e) {

// TODO Auto-generated catch block

System.out.println("++++++++++++++++系统获取配置文件中图片的路径异常===》");

logger.error("系统获取配置文件中图片的路径异常");

}

String path=patht+"/"+detailPath;

/*response.setContentType("multipart/form-data");  

        response.setCharacterEncoding("UTF-8");  

        response.setContentType("text/html");  

        // 2.设置文件头：最后一个参数是设置下载文件名  

        response.setHeader("Content-Disposition", "attachment;fileName=" + detailPath);  

        ServletOutputStream out;  */

        // 通过文件路径获得File对象  

    /*

        File html_file = new File(path);  

        FileInputStream inputStream=null;

try {

inputStream = new FileInputStream(html_file);

} catch (FileNotFoundException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}  

        // 3.通过response获取ServletOutputStream对象(out)  

        try {

out = response.getOutputStream();

 int b = 0;  

        byte[] buffer = new byte[1024];  

        while ((b = inputStream.read(buffer)) != -1) {  

            // 4.写到输出流(out)中  

            out.write(buffer, 0, b);  

        }  

        inputStream.close();  

        out.flush();  

        out.close(); 

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}  

*/

        

        try {

        File f = new File(path);

        if (!f.exists()) {

            response.setContentType("text/html;charset=utf-8");

            response.setCharacterEncoding("utf-8");

            response.getWriter().write("您下载的文件不存在！");

            return;

        }

        BufferedInputStream br = new BufferedInputStream(new FileInputStream(f));

        byte[] buf = new byte[1024];

        int len = 0;

 

        response.reset(); // 非常重要

        response.setHeader("Pragma", "No-cache");

        response.setHeader("Cache-Control", "must-revalidate, no-transform");

        response.setDateHeader("Expires", 0L);

        URL u;

u = new URL("file:///" + path);

        response.setContentType(u.openConnection().getContentType());

        response.setHeader("Content-Disposition", "inline; filename=" + f.getName());

        // 文件名应该编码成UTF-8

        

        OutputStream out1 = response.getOutputStream();

        while ((len = br.read(buf)) > 0)

            out1.write(buf, 0, len);

      

        try {

          br.close();

} catch (IOException e) {

e.printStackTrace();

}finally{

out1.close();

}

        

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

   

      

        

      

}