首先是导入jar包:
web.xml:
1 <servlet> 2 <servlet-name>mvc-dispatcher</servlet-name> 3 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 4 <init-param> 5 <param-name>contextConfigLocation</param-name> 6 <param-value>/WEB-INF/configs/mvc-dispatcher-servlet.xml</param-value> 7 </init-param> 8 <load-on-startup>1</load-on-startup> 9 </servlet> 10 <servlet-mapping> 11 <servlet-name>mvc-dispatcher</servlet-name> 12 <!-- mvc-dispatcher 拦截所有的请求 --> 13 <url-pattern>*.g</url-pattern> 14 </servlet-mapping>
mvc-dispatcher-servlet.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:p="http://www.springframework.org/schema/p" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xmlns:mvc="http://www.springframework.org/schema/mvc" 7 xmlns:tx="http://www.springframework.org/schema/tx" 8 xmlns:aop="http://www.springframework.org/schema/aop" 9 xsi:schemaLocation=" 10 http://www.springframework.org/schema/beans 11 http://www.springframework.org/schema/beans/spring-beans.xsd 12 http://www.springframework.org/schema/context 13 http://www.springframework.org/schema/context/spring-context.xsd 14 http://www.springframework.org/schema/mvc 15 http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 16 http://www.springframework.org/schema/tx 17 http://www.springframework.org/schema/tx/spring-tx.xsd 18 http://www.springframework.org/schema/aop 19 http://www.springframework.org/schema/aop/spring-aop.xsd"> 20 21 <!-- 激活 22 @Required 23 @Autowired,jsr250‘s 24 @PostConstruct, 25 @PreDestroy and @ Resource等标注 26 --> 27 <context:annotation-config /> 28 <!-- 29 DispatcherServlet上下文,只搜索@Controller标注的类,不搜索其他标注的类 30 --> 31 <context:component-scan base-package="com.test"> 32 <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> 33 </context:component-scan> 34 35 <!-- 36 37 HandlerMapping无需配置,Spring MVC可以默认启动 38 --> 39 <!-- 40 扩充了注解驱动,可以将请求参数绑定到控制器参数 41 启用基于annotation的handlerMapping. 42 --> 43 <!-- <mvc:annotation-driven /> --> 44 <mvc:annotation-driven> 45 <mvc:message-converters register-defaults="true"> 46 <bean class="org.springframework.http.converter.StringHttpMessageConverter"> 47 <constructor-arg> 48 <bean class="java.nio.charset.Charset" factory-method="forName"> 49 <constructor-arg value="UTF-8" /> 50 </bean> 51 </constructor-arg> 52 </bean> 53 54 <bean class="org.springframework.http.converter.StringHttpMessageConverter"> 55 <!-- 控制RequestBody返回值乱码 --> 56 <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" /> 57 </bean> 58 59 </mvc:message-converters> 60 </mvc:annotation-driven> 61 <!-- 62 静态资源处理,css,js,imgs 63 --> 64 <mvc:resources location="/resources/" mapping="/resources/**"/> 65 66 67 <!-- 视图解析器 --> 68 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 69 <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> 70 <property name="prefix" value="/WEB-INF/jsps/" /> 71 <property name="suffix" value=".jsp" /> 72 </bean> 73 74 <!-- 配置上传文件代码,导入commons-fileupload-1.2.2.jar,commons-io-2.4.jar 75 200*1024*1024即200M resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常 76 --> 77 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 78 <!-- 上传的最大限制 --> 79 <property name="maxUploadSize" value="209715200" /> 80 <!-- 默认编码 --> 81 <property name="defaultEncoding" value="UTF-8" /> 82 <!-- 上传文件的解析 --> 83 <property name="resolveLazily" value="true" /> 84 </bean> 85 86 <!-- 整合json,导入jackson-core-asl-1.1.2.jar,jackson-mapper-asl-1.1.2.jar 87 配置ViewResolver. 88 可以用多个ViewResolver.使用order属性排序.InternalResourceViewResolver放在最后 89 --> 90 <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> 91 <property name="order" value="1" /> 92 <property name="mediaTypes"> 93 <map> 94 <entry key="json" value="application/json" /> 95 <entry key="xml" value="application/xml" /> 96 <entry key="htm" value="text/html" /> 97 </map> 98 </property> 99 <property name="defaultViews"> 100 <list> 101 <!-- JSON View --> 102 <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"></bean> 103 </list> 104 </property> 105 <property name="ignoreAcceptHeader" value="true" /> 106 </bean> 107 </beans>
UploadController.java
1 @Controller
2 @RequestMapping(value = "/mvc")
3 public class UploadController { /** 上传目录名*/ private static String uploadFolderName = "uploadFiles"; /** 允许上传的扩展名*/ private static String [] extensionPermit = {"txt","jpg","xls","zip"};
4 /**
5 * 上传文件
6 * @param file
7 * @return
8 * @throws IOException
9 */
10 @RequestMapping(value="/upload",method=RequestMethod.POST)
11 public String doUploadFile(@RequestParam("file") MultipartFile file) throws IOException{
12 if(!file.isEmpty()){
13 System.out.println("提示:"+file.getOriginalFilename());
14 FileUtils.copyInputStreamToFile(file.getInputStream(), new File("d:\\upload\\",System.currentTimeMillis()+file.getOriginalFilename()));
15 }
16 return "success";
17 }
18 }
最终这个文件会被上传到d:upload里面,可是我们想把代码上传到项目文件夹里面,做一些修改.
@Controller
@RequestMapping(value = "/mvc")
public class UploadController { /** 上传目录名*/ private static final String uploadFolderName = "uploadFiles"; /** 允许上传的扩展名*/ private static String [] extensionPermit = {"txt","jpg","xls","zip"};
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public @ResponseBody String fileUpload(@RequestParam("file") CommonsMultipartFile file,
HttpSession session, HttpServletRequest request, HttpServletResponse response) throws Exception{
String curProjectPath = session.getServletContext().getRealPath("/");
String saveDirectoryPath = curProjectPath + "/" + uploadFolderName;
File saveDirectory = new File(saveDirectoryPath);
logger.debug("Project real path [" + saveDirectory.getAbsolutePath() + "]");
// 判断文件是否存在
if (!file.isEmpty()) {
String fileName = file.getOriginalFilename();
String fileExtension = FilenameUtils.getExtension(fileName);
if(!Arrays.asList(extensionPermit).contains(fileExtension)){
throw new Exception("No Support extension.");
}
FileUtils.copyInputStreamToFile(file.getInputStream(), new File(saveDirectoryPath,System.currentTimeMillis()+file.getOriginalFilename()));
}
logger.info("UploadController#fileUpload() end");
return "{‘status‘:200,‘msg‘:‘上传成功‘}";
}
}
运行后,在tomcat的项目目录里就可以找到新建的文件了.
后台代码编写完毕了,现在编写前台.
首先准备jquery,和ajaxfileupload.js
下载下来的ajaxfileupload.js需要做相应的修改,才能接收上传成功后从服务器返回的数据,
修改后才能和现在高版本的jquery相兼容.
具体改了哪些地方就不啰嗦了.我把改过的最终代码全部贴上来.
ajaxfileupload.js
1 jQuery.extend({
2
3
4 createUploadIframe: function (id, uri) {
5 //create frame
6 var frameId = ‘jUploadFrame‘ + id;
7 var iframeHtml = ‘<iframe id="‘ + frameId + ‘" name="‘ + frameId + ‘" style="position:absolute; top:-9999px; left:-9999px"‘;
8 if (window.ActiveXObject) {
9 if (typeof uri == ‘boolean‘) {
10 iframeHtml += ‘ src="‘ + ‘javascript:false‘ + ‘"‘;
11
12 }
13 else if (typeof uri == ‘string‘) {
14 iframeHtml += ‘ src="‘ + uri + ‘"‘;
15
16 }
17 }
18 iframeHtml += ‘ />‘;
19 jQuery(iframeHtml).appendTo(document.body);
20
21 return jQuery(‘#‘ + frameId).get(0);
22 },
23 createUploadForm: function (id, fileElementId, data) {
24 //create form
25 var formId = ‘jUploadForm‘ + id;
26 var fileId = ‘jUploadFile‘ + id;
27 var form = jQuery(‘<form action="" method="POST" name="‘ + formId + ‘" id="‘ + formId + ‘" enctype="multipart/form-data"></form>‘);
28 if (data) {
29 for (var i in data) {
30 if (data[i].name != null && data[i].value != null) {
31 jQuery(‘<input type="hidden" name="‘ + data[i].name + ‘" value="‘ + data[i].value + ‘" />‘).appendTo(form);
32 } else {
33 jQuery(‘<input type="hidden" name="‘ + i + ‘" value="‘ + data[i] + ‘" />‘).appendTo(form);
34 }
35 }
36 }
37 var oldElement = jQuery(‘#‘ + fileElementId);
38 var newElement = jQuery(oldElement).clone();
39 jQuery(oldElement).attr(‘id‘, fileId);
40 jQuery(oldElement).before(newElement);
41 jQuery(oldElement).appendTo(form);
42
43
44
45 //set attributes
46 jQuery(form).css(‘position‘, ‘absolute‘);
47 jQuery(form).css(‘top‘, ‘-1200px‘);
48 jQuery(form).css(‘left‘, ‘-1200px‘);
49 jQuery(form).appendTo(‘body‘);
50 return form;
51 },
52
53 ajaxFileUpload: function (s) {
54 // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
55 s = jQuery.extend({}, jQuery.ajaxSettings, s);
56 var id = new Date().getTime()
57 var form = jQuery.createUploadForm(id, s.fileElementId, (typeof (s.data) == ‘undefined‘ ? false : s.data));
58 var io = jQuery.createUploadIframe(id, s.secureuri);
59 var frameId = ‘jUploadFrame‘ + id;
60 var formId = ‘jUploadForm‘ + id;
61 // Watch for a new set of requests
62 if (s.global && !jQuery.active++) {
63 jQuery.event.trigger("ajaxStart");
64 }
65 var requestDone = false;
66 // Create the request object
67 var xml = {}
68 if (s.global)
69 jQuery.event.trigger("ajaxSend", [xml, s]);
70 // Wait for a response to come back
71 var uploadCallback = function (isTimeout) {
72 var io = document.getElementById(frameId);
73 try {
74 if (io.contentWindow) {
75 xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
76 xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
77
78 } else if (io.contentDocument) {
79 xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
80 xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
81 }
82 } catch (e) {
83 jQuery.handleError(s, xml, null, e);
84 }
85 if (xml || isTimeout == "timeout") {
86 requestDone = true;
87 var status;
88 try {
89 status = isTimeout != "timeout" ? "success" : "error";
90 // Make sure that the request was successful or notmodified
91 if (status != "error") {
92 // process the data (runs the xml through httpData regardless of callback)
93 var data = jQuery.uploadHttpData(xml, s.dataType);
94 // If a local callback was specified, fire it and pass it the data
95 if (s.success)
96 s.success(data, status);
97
98 // Fire the global callback
99 if (s.global)
100 jQuery.event.trigger("ajaxSuccess", [xml, s]);
101 } else
102 jQuery.handleError(s, xml, status);
103 } catch (e) {
104 status = "error";
105 jQuery.handleError(s, xml, status, e);
106 }
107
108 // The request was completed
109 if (s.global)
110 jQuery.event.trigger("ajaxComplete", [xml, s]);
111
112 // Handle the global AJAX counter
113 if (s.global && ! --jQuery.active)
114 jQuery.event.trigger("ajaxStop");
115
116 // Process result
117 if (s.complete)
118 s.complete(xml, status);
119
120 jQuery(io).unbind()
121
122 setTimeout(function () {
123 try {
124 jQuery(io).remove();
125 jQuery(form).remove();
126
127 } catch (e) {
128 jQuery.handleError(s, xml, null, e);
129 }
130
131 }, 100)
132
133 xml = null
134
135 }
136 }
137 // Timeout checker
138 if (s.timeout > 0) {
139 setTimeout(function () {
140 // Check to see if the request is still happening
141 if (!requestDone) uploadCallback("timeout");
142 }, s.timeout);
143 }
144 try {
145
146 var form = jQuery(‘#‘ + formId);
147 jQuery(form).attr(‘action‘, s.url);
148 jQuery(form).attr(‘method‘, ‘POST‘);
149 jQuery(form).attr(‘target‘, frameId);
150 if (form.encoding) {
151 jQuery(form).attr(‘encoding‘, ‘multipart/form-data‘);
152 }
153 else {
154 jQuery(form).attr(‘enctype‘, ‘multipart/form-data‘);
155 }
156 jQuery(form).submit();
157
158 } catch (e) {
159 jQuery.handleError(s, xml, null, e);
160 }
161
162 jQuery(‘#‘ + frameId).load(uploadCallback);
163 return { abort: function () { } };
164
165 },
166
167 uploadHttpData: function (r, type) {
168 var data = !type;
169 if (!type)
170 data = r.responseText;
171 if (type == "xml")
172 data = r.responseXML;
173 //data = type == "xml" || data ? r.responseXML : r.responseText;
174 // If the type is "script", eval it in global context
175 if (type == "script")
176 jQuery.globalEval(data);
177 // Get the JavaScript object, if JSON is used.
178 if (type == "json") {
179 ////////////Fix the issue that it always throws the error "unexpected token ‘<‘"///////////////
180 data = r.responseText;
181 var start = data.indexOf(">");
182 if (start != -1) {
183 var end = data.indexOf("<", start + 1);
184 if (end != -1) {
185 data = data.substring(start + 1, end);
186 }
187 }
188 ///////////////////////////////////////////////////////////////////////////////////////////////
189 eval("data = " + data);
190 }
191 // evaluate scripts within html
192 if (type == "html")
193 jQuery("<div>").html(data).evalScripts();
194
195 return data;
196 },
197
198 handleError: function (s, xhr, status, e) {
199 // If a local callback was specified, fire it
200 if (s.error) {
201 s.error.call(s.context || s, xhr, status, e);
202 }
203
204 // Fire the global callback
205 if (s.global) {
206 (s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError", [xhr, s, e]);
207 }
208 }
209 })
html代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>上传页面三</title>
<script type="text/javascript" src="static/js/jquery-1.7.2.js"></script>
<script type="text/javascript" src="static/js/ajaxfileupload.js"></script>
</head>
<body>
<h2>JQuery ajaxfileupload文件上传</h2>
<div id="loading" style="display: none;">正在上传.....</div>
用户信息：
<br /> 姓名：
<input id="name" name="name" type="text">
<br /> 附件：
<input id="fileToUpload" name="file" type="file" class="input">
<br />
<input type="button" onclick="ajaxFileUpload()" value="上传">
<br />
<script type="text/javascript">
function ajaxFileUpload() {
$(‘#loading‘).show();
$.ajaxFileUpload({
url : ‘mvc/upload.g‘,
secureuri : false,
fileElementId : ‘fileToUpload‘,
dataType : ‘json‘,//此时指定的是后台需要返回json字符串,前端自己解析,可以注释掉.后台直接返回map
data : {
name : $(‘#name‘).val()
},
success : function(data, status) {
alert("success");
console.log(data);
$(‘#loading‘).hide();
},
error : function(data, status, e) {
$(‘#loading‘).hide();
//这里处理的是网络异常，返回参数解析异常，DOM操作异常
alert("上传发生异常");
}
})
}
</script>
</body>
</html>
好,结束.
当你程序跑起来的时候,打开控制台你是看不到ajax提交请求的.因为ajaxFileupload.js上传的 原理是:form表单+iframe提交的.
服务器端返回的数据最终会进入到iframe里面的.通过修改ajaxFileUpload.js把这个数据从ifram中解析出来.
这个过程可以在success里加个alert,阻止脚本执行,来观察到.当success执行完毕后,form和iframe被删除.
可以结合前面的上传博客来更好地理解这里.
时间： 2025-01-04 07:50:47