文件下載時(shí)的亂碼問題:1.關(guān)于下載時(shí)中文名稱資源查找不到原因:<a href='${pageContext.request.contextPath}/download?filename=天空.mp3'>天空.mp3</a>這是get請求。在服務(wù)器端:String filename = request.getParameter("filename");解決: new String(filename.getBytes("iso8859-1"),"utf-8"); 2.下載文件顯示時(shí)的中文亂碼問題response.setHeader("content-disposition", "attachment;filename="+filename);IE:要求filename必須是utf-8碼firefox:要求filename必須是base64編碼.問題:怎樣判斷瀏覽器?String agent=request.getHeader("user-agent");if (agent.contains("MSIE")) {// IE瀏覽器filename = URLEncoder.encode(filename, "utf-8");} else if (agent.contains("Firefox")) {// 火狐瀏覽器BASE64Encoder base64Encoder = new BASE64Encoder();filename = "=?utf-8?B?"+ base64Encoder.encode(filename.getBytes("utf-8"))+ "?=";}else {// 其它瀏覽器filename = URLEncoder.encode(filename, "utf-8");

處理IE瀏覽器與Firefox瀏覽器亂碼問題

if (agent.contains("MSIE")) {

??????????????????????????? // IE瀏覽器

??????????????????????????? filename = URLEncoder.encode(filename, "utf-8");

??????????????????????????? filename = filename.replace("+", " ");

???????????????????? } else if (agent.contains("Firefox")) {

??????????????????????????? // 火狐瀏覽器

??????????????????????????? BASE64Encoder base64Encoder = new BASE64Encoder();

??????????????????????????? filename = "=?utf-8?B?"

????????????????????????????????????????? + base64Encoder.encode(filename.getBytes("utf-8"))

????????????????????????????????????????? + "?=";

???????????????????? } else if (agent.contains("Chrome")) {

??????????????????????????? // google瀏覽器

??????????????????????????? filename = URLEncoder.encode(filename, "utf-8");

???????????????????? } else {

??????????????????????????? // 其它瀏覽器

??????????????????????????? filename = URLEncoder.encode(filename, "utf-8");

???????????????????? }

package cn.learn.web.servlet;import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.OutputStream; import java.net.URLEncoder;import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;import sun.misc.BASE64Encoder;public class DownloadServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {// 1.得到要下載 的文件名稱String filename = request.getParameter("filename");filename = new String(filename.getBytes("iso8859-1"), "utf-8");// 解決中文亂碼// 2.在d:/upload目錄下查找這個(gè)文件是否存在File file = new File("d:/upload/" + filename);if (file.exists()) {// /文件存在，完成下載// 下載注意事項(xiàng)1--設(shè)置下載文件的mimeTypeString mimeType = this.getServletContext().getMimeType(filename);response.setContentType(mimeType);String agent = request.getHeader("user-agent");if (agent.contains("MSIE")) {// IE瀏覽器filename = URLEncoder.encode(filename, "utf-8");} else if (agent.contains("Firefox")) {// 火狐瀏覽器BASE64Encoder base64Encoder = new BASE64Encoder();filename = "=?utf-8?B?"+ base64Encoder.encode(filename.getBytes("utf-8"))+ "?=";} else {// 其它瀏覽器filename = URLEncoder.encode(filename, "utf-8");}// 下載注意事項(xiàng)2--永遠(yuǎn)是下載response.setHeader("content-disposition", "attachment;filename="+ filename);FileInputStream fis = new FileInputStream(file); // 讀取要下載文件的內(nèi)容OutputStream os = response.getOutputStream(); // 將要下載的文件內(nèi)容通過輸出流寫回到瀏覽器端.int len = -1;byte[] b = new byte[1024 * 100];while ((len = fis.read(b)) != -1) {os.write(b, 0, len);os.flush();}os.close();fis.close();} else {throw new RuntimeException("下載資源不存在.");}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}

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超強(qiáng)干貨來襲 云風(fēng)專訪：近40年碼齡，通宵達(dá)旦的技術(shù)人生

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