1、文件的操作,读写文件,解决乱码问题
读文件
InputStreamReader isr = new InputStreamReader(new FileInputStream(new File(path)), "UTF-8"); BufferedReader reader = new BufferedReader(isr); String s; while ((s = reader.readLine()) != null) { content += s + " "; } reader.close();
写文件
Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile1.getAbsolutePath().toString()), "UTF-8")); writer.write(content); writer.close();
2、struts2常用标签
单选框:<s:radio name="Gender" list="#{'男':'男','女':'女'}" listKey="key" listValue="value" value="'男'" />
时间格式化:<s:date name="publishTime" format="yyyy年MM月dd日 HH:mm:ss" />
下拉框: <s:select list="#request.role" name="role1" value="roleName" key="id" headerKey="0" headerValue="清选择角色"></s:select>
3、ajax上传文件
ajax上传文件主要是使用了ajaxfileupload.js插件,ajax代码如下所示:
HTMl代码:
<input id="fileToUpload" type="file" size="20" name="myFile" class="input"> <button type="button" id="buttonUpload" data-dismiss="modal" class="btn btn-primary">上传</button>
js代码:
$("#buttonUpload").click(function() { //验证图片格式 var format = $("#fileToUpload").val(); var type = format.substring(format.lastIndexOf(".") + 1, format.length).toLowerCase(); onsole.info(format); console.info(type); if (type != "jpg" && type != "jpeg" && type != "bmp" && type != "gif" && type != "png") { alert("请上传正确的图片格式"); return; } $.ajaxFileUpload({ url : 'notice_AddImage.action',//处理图片脚本 ecureuri : false, fileElementId : 'fileToUpload',//file控件id dataType : 'text', success : function(data) { $("#dd").html(data); var value = $("#dd pre").html(); if (value == "undefined" || value == null) { value = data; } console.info("dd:" + value); $("#btn_image").val(value); console.info("image:" + $("#btn_image").val()); $("#tooltip").html("图片导入成功"); }, error : function(data) { $("#dd").val(data); console.info("error"); alert("error"); } }); });
java代码:
1 // myFile属性用来封装上传的文件 2 private File myFile; 3 4 // myFileContentType属性用来封装上传文件的类型 5 private String myFileContentType; 6 7 // myFileFileName属性用来封装上传文件的文件名 8 private String myFileFileName; 9 InputStream is; 10 try { 11 is = new FileInputStream(myFile); 12 // 设置上传文件目录 13 String uploadPath = TemplateUtils.BASEPATH + "\upload"; 14 // 重命名文件 15 String fileName = StringUtils.getUUID() + this.getMyFileFileName().substring(myFileFileName.lastIndexOf("."), myFileFileName.length()); 16 // 设置目标文件 17 File toFile = new File(uploadPath, fileName); 18 // 创建一个输出流 19 OutputStream os = new FileOutputStream(toFile); 20 // 设置缓存 21 byte[] buffer = new byte[1024]; 22 int length = 0; 23 // 读取myFile文件输出到toFile文件中 24 while ((length = is.read(buffer)) > 0) { 25 os.write(buffer, 0, length); 26 } 27 // 关闭输入流 28 is.close(); 29 // 关闭输出流 30 os.close();