springMVC实现上传文件功能

1.spring_fileupload.xml配置文件如下:

Xml代码  



<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  

    <!--<property name="maxUploadSize" value="10485760"></property>-->  

</bean>  

 

2.FileUploadAction控制器如下:

Java代码  



       @RequestMapping(params = "method=up", method = RequestMethod.POST)  

@ResponseBody  

public Map<String, String> uploadSolver(@RequestParam MultipartHttpServletRequest request {  

    Map<String,String> info = new HashMap<String,String>();  

    MultipartFile patch = request.getFile("file");  

    if (!patch.isEmpty()) {  

        try {  

            String fileName = patch.getOriginalFilename();  

  

            /** 

             * 获取文件后缀 

             */  

            System.out.println(fileName);  

            String suffix = fileName.substring(fileName.lastIndexOf("."));  

  

            /** 

             * 判断上传的文件格式是否正确 

             */  

            if ((".zip.rar.gz.tar.bz2.txt".indexOf(suffix.toLowerCase()) != -1)) {  

                Integer fileSize = (int) patch.getSize() / 1024;  

  

                /** 

                 * 如果文件小于10M，则上传文件，否则提示用户不能超过10M 

                 */  

                if (fileSize <= 10240) {  

  

                    String uploadPath = ClassLoaderUtil.getProperties("uploadFile.properties").getProperty("filePath");  

                    System.out.println(uploadPath);  

                    File filePath = new File(request.getSession()  

                            .getServletContext().getRealPath(uploadPath));  

                    System.out.println(filePath.getAbsolutePath());  

                    /** 

                     * 判读存储文件路是否存在，不存在则创建 

                     */  

                    if (! filePath.exists()) {  

                        filePath.mkdirs();  

                        System.out.println("上传文件路径不存在，创建成功！");  

                    }  

                    /** 

                     * 文件开始上传到服务器上 

                     */  

                    patch.transferTo(new File(filePath.getAbsolutePath()+"\\"+fileName));  

                    info.put("success", "true");  

                    info.put("msg", "上传成功！");  

  

                } else {  

                    System.out.println("上传的文件太大，文件大小不能超过10M");  

                    info.put("success","false");  

                    info.put("msg", "上传的文件太大，文件大小不能超过10M");  

                }  

            } else {  

                System.out.println("上传的文件格式不支持");  

                info.put("success","false");  

                info.put("msg", "上传的文件格式不支持");  

                  

            }  

        } catch (IOException e) {  

            e.printStackTrace();  

            System.out.println("系统异常");  

            info.put("success","false");  

            info.put("msg", "系统异常");  

        }  

    }  

    return info;  

}  

 3.前端表单使用Extjs 如下：

Js代码  



Ext.onReady(function (){  

      

    var addFileTextField = new Ext.form.TextField({  

        name:'file',  

        allowBlank:false,  

                //使用HTML中的filetext  

                inputType:'file'  

              

    });  

      

      

    var addFileFormPanel = new Ext.form.FormPanel({  

         autoDestory:true,  

                 fileUpload:true,  

         frame:true,  

         width:300,  

         autoHeight:true,  

         labelAlign:'right',  

         labelWidth:60,  

         defaultType:'textfield',  

         defaults:{width:200,allowBlank:false},  

           

         items: [addFileTextField]  

    });  

      

      

    var addFileWindow = new Ext.Window({  

            id : "addFileWindow",  

            title : "上传文件",  

            width : 640,  

            height : 200,  

            resizable : false,  

            modal : true,  

            maximizable : false,  

            closeAction : "hide",  

            constrain : true,  

            layout : "vbox",  

            animateTarget:'target',  

            layoutConfig:{  

                align: "stretch"  

            },  

            items : [addFileFormPanel],  

            buttons:[  

                {text:'上传',handler:function (){  

                        if(! addFileFormPanel.getForm().isValid()) {  

                            return false;  

                        }  

                        //上传  

                        addFileFormPanel.getForm().submit({  

                            url:'uploadFile.do?method=up',  

                            waitMsg: '正在上传...',  

                            success: function (form,response){  

                                Ext.Msg.alert('success',response.result.msg);  

                            },  

                            failure: function (form,response){  

                                Ext.Msg.alert('error',response.result.msg);  

                            }  

                        });  

                    }  

                }  

            ]  

    });  

});