Extjs4 + springMVC的文件上传

用springMVC来做项目，如果遇到文件上传，那么一定要用spring自带的文件处理类来处理上传的文件，因为效率实在高过其他的。

从界面传过来的参数，如果设置了值对象，那么可以从值对象里面取出字符串类型的普通参数，如果不这样做，也可以直接从request里面获得，两种方法都可以。

问题是如果值对象里面写了其他类型的变量，妄想像Struts2那样处理，springMVC就会报出400 Bad Request的错误。

在Struts2里面，我们可以定义一个值对象为

public class ImageVo {    private String roomnumber;    private File image1 ;    private File image2 ;　　private File image3 ;}

然后在后台从前台传过来的值对象里面取出image1……，那就是一个文件流了，非常好处理上传文件。但springMVC只能接受全部为string类型的字符串值，那么该怎么做呢？

前台Extjs4代码：

/** * 图片添加 * @type {Ext.form.Panel} */var addImageForm = new Ext.form.Panel({    border: false, bodyPadding: 5, id: 'addImageForm',height:350,    fieldDefaults: {labelWidth: 80, labelSeparator: ": ", anchor: '95%'},    items: [        {xtype:'fieldset',title:'图片上传', collapsible:true,            items:[                {                    xtype:'textfield',                    fieldLabel: '房间号码',                    name: 'roomnumber',                    id: 'roomnumber1',                    allowBlank: false,                    maskRe: /[\d]/,                    reegx: /[\d{4}]/,                    minLength: 4,                    maxLength: 4,                    emptyText: '请输入四位的房间号码（前两位代表楼层，后两位代表房间号）',                    regexText: '请输入正确的房间号码',                    //验证该房间号码是否存在 !                    listeners: {                        blur: function (e, t, eOpts) {                            var roomnumber = e.rawValue;                            if(roomnumber.length == 4){                                Ext.Ajax.request({                                    method: 'post',                                    params: {roomnumber: roomnumber},                                    url: '/room/findroomhold',                                    callback: function (options, success, response) {                                        var jsonString = Ext.JSON.decode(response.responseText);                                        if (jsonString.success) {                                        } else {                                            Ext.Msg.alert('警告', jsonString.msg);                                        }                                    }                                });                            }                        }                    }                },{                    xtype:'filefield',                    fieldLabel:'上传图片1',                    name:'image1',                    id:'image1',                    buttonText:'',                    buttonConfig:{iconCls:'upload'},                    listeners:{                        change:function(btn, value, eOpts){                            var img_reg = /\.([jJ][pP][gG]){1}$|\.([jJ][pP][eE][gG]){1}$|\.([gG][iI][fF]){1}$|\.([pP][nN][gG]){1}$|\.([bB][mM][pP]){1}$/;                            if ( img_reg.test(value) ) {                                var img = Ext.getCmp('img1');                                var file = btn.fileInputEl.dom.files[0];                                var url = URL.createObjectURL(file);                                img.setSrc(url);                            } else {                                Ext.Msg.alert('提示', '请选择图片类型的文件！');                                return ;                            }                        }                    }                },{                    xtype:'filefield',                    fieldLabel:'上传图片2',                    name:'image2',                    id:'image2',                    buttonText:'',                    buttonConfig:{iconCls:'upload'},                    listeners:{                        change:function(btn, value){                            var img_reg = /\.([jJ][pP][gG]){1}$|\.([jJ][pP][eE][gG]){1}$|\.([gG][iI][fF]){1}$|\.([pP][nN][gG]){1}$|\.([bB][mM][pP]){1}$/;                            if ( img_reg.test(value) ) {                                var img = Ext.getCmp('img2');                                var file = btn.fileInputEl.dom.files[0];                                var url = URL.createObjectURL(file);                                img.setSrc(url);                            } else {                                Ext.Msg.alert('提示', '请选择图片类型的文件！');                                return ;                            }                        }                    }                },{                    xtype:'filefield',                    fieldLabel:'上传图片3',                    name:'image3',                    id:'image3',                    buttonText:'',                    buttonConfig:{iconCls:'upload'},                    listeners:{                        change:function(btn, value){                            var img_reg = /\.([jJ][pP][gG]){1}$|\.([jJ][pP][eE][gG]){1}$|\.([gG][iI][fF]){1}$|\.([pP][nN][gG]){1}$|\.([bB][mM][pP]){1}$/;                            if ( img_reg.test(value) ) {                                var img = Ext.getCmp('img3');                                var file = btn.fileInputEl.dom.files[0];                                var url = URL.createObjectURL(file);                                img.setSrc(url);                            } else {                                Ext.Msg.alert('提示', '请选择图片类型的文件！');                                return ;                            }                        }                    }                }            ]        },{xtype:'fieldset',title:'图片预览',layout:'column',defaults:{width:130},            items:[                {xtype:'image',id:'img1'},                {xtype:'image',id:'img2'},                {xtype:'image',id:'img3'}            ]        }    ],    dockedItems: [        {            xtype: 'toolbar', dock: 'bottom', ui: 'footer', layout: {pack: 'center'},            items: [                {text: '确认上传', disabled: true, formBind: true, handler: function () {                    var form = this.up('form').getForm();                    if (form.isValid()) {                        form.submit({                            url: '/image/add',                            method: 'post',                            submitEmptyText: false,                            waitMsg: '请稍等，系统正在帮您添加',                            success: function (form, action) {                                //Ext.Msg.alert('成功', "上传成功！");                                Ext.Msg.alert('成功', action.result.msg);                            },                            failure: function (form, action) {                                Ext.Msg.alert('失败', action.result.msg);                                //Ext.Msg.alert('失败', "上传失败");                            }                        })                    }                }},                {text: '重置', handler: function () {                    this.up('form').getForm().reset();                }}            ]        }    ]});

如图：

后台的java代码，因为只有一个非文件类的值，所以直接放到了参数里面了。

import com.lhx.hotel.model.Image;import com.lhx.hotel.service.ImageService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartResolver;import javax.servlet.http.HttpServletRequest;import java.io.File;import java.io.IOException;import java.util.*;/** * Created by xin on 14-5-18. */@Controller@RequestMapping("/image")public class ImageController {    Map<String,Object> outmap = new HashMap<String, Object>();    @Autowired    private ImageService imageService ;    @RequestMapping("/add")    @ResponseBody    public Map<String,Object> add(String roomnumber, HttpServletRequest request) throws IOException {        List<String> fileTypes = new ArrayList<String>();        fileTypes.add(".jpg");        fileTypes.add(".jpeg");        fileTypes.add(".bmp");        fileTypes.add(".gif");        fileTypes.add(".png");        //是否成功上传了文件        boolean ishasuploadimage = false ;        //成功上传了n个图像        int imageNum = 0 ;        /**         * 想通过ImageVo imageVo,但需要全部是string类型         * 并且没有其他什么参数，大材小用，舍弃         * String roomnumber = imageVo.getRoomnumber();         */        String imagepath = request.getRealPath("/upload");        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());        if (multipartResolver.isMultipart(request)){            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request ;            //String roomnumber = multiRequest.getParameter("roomnumber");            if (!"".equals(roomnumber) && roomnumber != null){                int ronumber = Integer.valueOf(roomnumber) ;                Iterator<String> iter = multiRequest.getFileNames();                Image image = null ;                while (iter.hasNext()){                    MultipartFile file = multiRequest.getFile((String)iter.next());                    //byte[] bytes = file.getBytes();                    //long size = file.getSize();                    //有上传文件的话，容量是大于0的。                    if (file.getSize() > 0){                        ishasuploadimage = true ;                        String imagename = file.getOriginalFilename();                        String ext = imagename.substring(imagename.lastIndexOf(".")) ;                        if (fileTypes.contains(ext)){                            //文件名为：房间号码 + image + 系统时间 + 后缀                            String fileName = roomnumber + "image" + System.currentTimeMillis() + ext ;                            image = new Image();                            image.setPhpath(fileName);                            image.setPhroomnumber(ronumber);                            File localFile = new File(imagepath,fileName);                            try {                                file.transferTo(localFile);                                imageService.insertSelective(image);                                imageNum ++ ;                            } catch (IOException e) {                                e.printStackTrace();                                outmap.put("success",false);                                outmap.put("msg","系统出错");                                return outmap ;                            }                        } else {                            outmap.put("success",false);                            outmap.put("msg","成功上传" + imageNum + "张图片，遇到不能上传的非图片类的文件而出错！");                            return outmap ;                        }                    }                }            } else {                //这种情况很少见，除非直接在浏览器里面输入地址                outmap.put("success",false);                outmap.put("msg","没有对应的房间号");                return outmap ;            }        }        if (!ishasuploadimage){            outmap.put("success",false);            outmap.put("msg","没有上传文件");            return outmap ;        }        outmap.put("success",true);        outmap.put("msg","成功上传" + imageNum + "张图片！");        return outmap ;    }}

这些代码是先写的，没什么注释，如果不是很看得懂，下面这个例子就详细点了

Extjs4前台代码：

/** * Created by xin on 14-5-19. */var addStaffForm = new Ext.form.Panel({    border: false, bodyPadding: 5, id: 'addStaffForm', height: 560,    fieldDefaults: {labelWidth: 80, labelSeparator: ": ", anchor: '0', margin:'2 2 2 2'},    items:[        {            xtype:'fieldset',            defaultType: 'textfield',            items: [                {                    xtype: 'container',                    anchor: '-5',                    layout: 'column',                    items: [                        {xtype: 'textfield', width: 180, fieldLabel: "姓名", id: 'staffname', name: 'staffname',                            allowBlank: false, blankText: '姓名必须输入', emptyText: '请输入真实姓名'},                        {xtype: 'combobox', width: 180, fieldLabel: "性别", id: 'staffgender', name: 'staffgender', store: sexStore,                            valueField: 'text', value: '男', allowBlank: false, blankText: '请选择', labelAlign:'right',editable:false,                            listConfig: {                                getInnerTpl: function () {                                    return "<img src='public/images/{id}.gif'/>{text}"                            }                        }}                    ]                },                {                    xtype: 'container',                    anchor: '-5',                    layout: 'column',                    items: [                        {xtype: 'textfield', fieldLabel: "职责", width: 180, id: 'staffprofession', name: 'staffprofession', emptyText: '请输入职责名称',                            allowBlank: false, blankText: '职责名称必须输入'},                        {xtype: 'textfield', fieldLabel: "部门", width: 180, id: 'staffdepartment', name: 'staffdepartment', allowBlank: false,labelAlign:'right'}                    ]                },                {                    xtype:'numberfield',                    fieldLabel: "月薪",                    id: 'staffsalary',                    name: 'staffsalary',                    anchor: '95%',                    step:50,                    maxValue:999999,                    allowBlank: true,                    minValue:0,                    negativeText:'月薪不能为负数',                    emptyText: '请填入月薪'                },                {                    xtype: 'fieldcontainer', fieldLabel: '电话', defaultType: 'textfield', layout: 'hbox', anchor: '95%',                    combineErrors: true,                    items: [                        {name: 'staffzone', id: 'staffzone', width: 50, emptyText: '区号', maskRe: /[\d]/, reegx: /[\d{3,4}]/,                            minLength: 3, maxLength: 4, regexText: '请输入正确的区号'},                        {xtype: 'label', text: '--'},                        {name: 'stafftelnumber', id: 'stafftelnumber', flex: 1, emptyText: '请输入电话号码', maskRe: /[\d]/, reegx: /[\d{7,8}]/,                            minLength: 7, maxLength: 8, regexText: '请输入正确的电话号码'}                    ]                },                {                    fieldLabel: '手机号码',                    name: 'staffmobile',                    id: 'staffmobile',                    allowBlank: true,                    anchor: '95%',                    maskRe: /[\d]/,                    reegx: /[\d{11}]/,                    minLength: 11,                    maxLength: 11,                    emptyText: '请输入手机号码',                    regexText: '请输入正确的手机号码'                },                {                    fieldLabel: '电子邮箱',                    name: 'staffemail',                    id: 'staffemail',                    allowBlank: true,                    anchor: '95%',                    emptyText: '请输入电子邮箱地址',                    vtype: 'email'                },                {                    xtype: 'fieldcontainer', fieldLabel: '地区', defaultType: 'combobox', layout: 'hbox', anchor: '95%',                    items: [                        {name: 'staffprovince', id: 'staffprovince', width: 90, emptyText: '请选择省', valueField: 'regionId', displayField: 'regionName',                            store: provinceStore, queryMode: 'local', triggerAction: 'all', selectOnFocus: true, forceSelection: true,editable:false,                            listeners: {                                change: function (f, newValue, oldValue) {                                    var cityStore = Ext.data.StoreManager.lookup('cityStore');                                    var city = this.up('form').getForm().findField('staffcity');                                    var county = this.up('form').getForm().findField('staffcounty');                                    if (newValue && newValue != oldValue) {                                        city.setValue();                                        county.setValue();                                        cityStore.load({params: {parentId: newValue}});                                    }                                }                            }                        },                        {name: 'staffcity', id: 'staffcity', width: 90, store: cityStore, emptyText: '请选择市', valueField: 'regionId',                            displayField: 'regionName',queryMode: 'local', triggerAction: 'all', selectOnFocus: true, forceSelection: true,                            editable:false,                            listeners: {                                change: function (f, newValue, oldValue) {                                    var countyStore = Ext.data.StoreManager.lookup('countyStore');                                    var county = this.up('form').getForm().findField('staffcounty');                                    if (newValue && newValue != oldValue) {                                        county.setValue();                                        countyStore.load({params: {parentId: newValue}});                                    }                                }                            }                        },                        {name: 'staffcounty', id: 'staffcounty', width: 90, store: countyStore, emptyText: '请选择区（县）', valueField: 'regionId',                            displayField: 'regionName',queryMode: 'local', triggerAction: 'all', selectOnFocus: true, editable:false,                            forceSelection: true}                    ]                },                {                    fieldLabel: '地址',                    name: 'staffpartaddress',                    id: 'staffpartaddress',                    allowBlank: true,                    emptyText: '请输入详细地址',                    anchor: '95%'                },                {                    xtype:'filefield',                    fieldLabel:'上传头像',                    name:'avatar',                    id:'avatar',                    anchor: '95%',                    buttonText:'',                    buttonConfig:{iconCls:'upload'},                    listeners:{                        change:function(btn,value){                            //是否是规定的图片类型                            var img_reg = /\.([jJ][pP][gG]){1}$|\.([jJ][pP][eE][gG]){1}$|\.([gG][iI][fF]){1}$|\.([pP][nN][gG]){1}$|\.([bB][mM][pP]){1}$/;                            if (img_reg.test(value)) {                                var img = Ext.getCmp('staffavatar');                                var file = btn.fileInputEl.dom.files[0];                                var url = URL.createObjectURL(file);                                img.setSrc(url);                            } else {                                Ext.Msg.alert('提示', '请选择图片类型的文件！');                                return ;                            }                        }                    }                }            ]        },        {            xtype: 'fieldset',            title: '图片预览',  defaults: {margin:'1 1 1 100', width: 200,height:260},            items: [                {xtype: 'image', id: 'staffavatar',border: 2,                    style: {                        borderColor: 'blue',                        borderStyle: 'solid'                    }}            ]        }    ],    dockedItems: [        {            xtype: 'toolbar', dock: 'bottom', ui: 'footer', layout: {pack: 'center'},            items: [                {text: '添加', disabled: true, formBind: true, handler: function () {                    var form = this.up('form').getForm();                    if (form.isValid()) {                        form.submit({                            url: '/staff/add',                            method: 'post',                            submitEmptyText: false,                            waitMsg: '请稍等，系统正在帮您添加',                            success: function (form, action) {                                Ext.Msg.alert('成功', action.result.msg);                                //清除填过的内容                                //form.findField('guestname').setValue();                            },                            failure: function (form, action) {                                Ext.Msg.alert('失败', action.result.msg);                            }                        })                    }                }},                {text: '重置', handler: function () {                    this.up('form').getForm().reset();                }}            ]        }    ]});

显示效果：

写一个值对象：

/** * Created by xin on 14-5-20. */public class StaffVo {    private String staffname ;    private String staffgender ;    private String staffprofession ;    private String staffdepartment ; // 部门    //如果改为double类型，这个上传的值不能为空值，所有改为string类型    private String staffsalary ; //月薪    private String staffzone ; //区号    private String stafftelnumber ; //号码    private String staffmobile ; //手机号码    private String staffemail ; //邮箱    private String staffprovince ;    private String staffcity ;    private String staffcounty ;    private String staffpartaddress ;    /**     * 这个file类型在这里是有问题的，不象struts可进行封装，如果有上传文件，     * 就不能整个对象传过去了，所有要进行删除     */    //private File avatar ; //头像    public String getStaffname() {        return staffname;    }    public void setStaffname(String staffname) {        this.staffname = staffname;    }    public String getStaffgender() {        return staffgender;    }    public void setStaffgender(String staffgender) {        this.staffgender = staffgender;    }    public String getStaffprofession() {        return staffprofession;    }    public void setStaffprofession(String staffprofession) {        this.staffprofession = staffprofession;    }    public String getStaffdepartment() {        return staffdepartment;    }    public void setStaffdepartment(String staffdepartment) {        this.staffdepartment = staffdepartment;    }    public String getStaffsalary() {        return staffsalary;    }    public void setStaffsalary(String staffsalary) {        this.staffsalary = staffsalary;    }    public String getStaffzone() {        return staffzone;    }    public void setStaffzone(String staffzone) {        this.staffzone = staffzone;    }    public String getStafftelnumber() {        return stafftelnumber;    }    public void setStafftelnumber(String stafftelnumber) {        this.stafftelnumber = stafftelnumber;    }    public String getStaffmobile() {        return staffmobile;    }    public void setStaffmobile(String staffmobile) {        this.staffmobile = staffmobile;    }    public String getStaffemail() {        return staffemail;    }    public void setStaffemail(String staffemail) {        this.staffemail = staffemail;    }    public String getStaffprovince() {        return staffprovince;    }    public void setStaffprovince(String staffprovince) {        this.staffprovince = staffprovince;    }    public String getStaffcity() {        return staffcity;    }    public void setStaffcity(String staffcity) {        this.staffcity = staffcity;    }    public String getStaffcounty() {        return staffcounty;    }    public void setStaffcounty(String staffcounty) {        this.staffcounty = staffcounty;    }    public String getStaffpartaddress() {        return staffpartaddress;    }    public void setStaffpartaddress(String staffpartaddress) {        this.staffpartaddress = staffpartaddress;    }}

数据库的持久层对象就不写了，大同小异。处理的java类

import com.lhx.hotel.model.Staff;import com.lhx.hotel.service.StaffService;import com.lhx.hotel.vo.StaffVo;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartResolver;import javax.servlet.ServletContext;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import java.io.File;import java.io.IOException;import java.util.*;/** * Created by xin on 14-5-20. */@Controller@RequestMapping("/staff")public class StaffController {    //返回的map，会自动封装成json    Map<String,Object> outmap = new HashMap<String, Object>();    @Autowired    private StaffService staffService ;    @RequestMapping("/add")    @ResponseBody    public Map<String,Object> add(StaffVo staffVo, HttpServletRequest request, HttpServletResponse response){        //持久层对象        Staff staff = new Staff();        /**         * 基本信息的提取         * 因为都是string类型，所有不可能为空，         * 持久层对象属性同是string类型的，不用进行判断，         * 非string类型的要进行判断，防止异常         * extjs界面如果有格式限制的话，就不用trim处理，因为不允许输入空格         * 没有限制的话还是要进行trim处理的         * 对null进行trim处理会出现空指针异常，但幸亏传过来的值是空值""         */        String staffname = staffVo.getStaffname().trim();        String staffgender = staffVo.getStaffgender();        String staffprofession = staffVo.getStaffprofession().trim();        String staffdepartment = staffVo.getStaffdepartment().trim();        String staffzone = staffVo.getStaffzone();        String stafftelnumber = staffVo.getStafftelnumber();        String telphone = staffzone + stafftelnumber ;        String staffmobile = staffVo.getStaffmobile();        String staffemail = staffVo.getStaffemail();        //地址，进行拼接        String staffprovince = staffVo.getStaffprovince();        String staffcity = staffVo.getStaffcity();        String staffcounty = staffVo.getStaffcounty();        String staffpartaddress = staffVo.getStaffpartaddress().trim();        String address = staffprovince + staffcity + staffcounty + staffpartaddress ;        //非string类型，要进行判断        String staffsalary = staffVo.getStaffsalary();        if (!"".equals(staffsalary)){            double salary = Double.valueOf(staffsalary);            staff.setStsalary(salary);        }        //后加的工号 年份月份加序号（位数不够前面加0）        Calendar c = Calendar.getInstance();        int year = c.get(Calendar.YEAR);        int month = c.get(Calendar.MONTH);        int staffnum = staffService.getrecordSize() ;        String staffnumstr=String.valueOf(staffnum);        String [] ss = {"00000","0000","000","00","0",""};        staffnumstr = ss[staffnumstr.length()-1] + staffnumstr;        String stjobnumber = year + "" + month + staffnumstr;        /**         * 填充到持久层对象中         */        staff.setStname(staffname);        staff.setStgender(staffgender);        staff.setStprofession(staffprofession);        staff.setStdepartment(staffdepartment);        staff.setSttelphone(telphone);        staff.setStmobile(staffmobile);        staff.setStemail(staffemail);        staff.setStaddress(address);        staff.setStjobnumber(stjobnumber);        /**         * 对上传文件进行处理         */        //获取servlet上下文        ServletContext servletContext = request.getSession().getServletContext();        //spring的文件处理解析类，包装了servlet的上下文。        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(servletContext);        //是否有上传文件        boolean hasUploadAvatar = false ;        //如果是multipart的提交，这个判断有点多余，不过还是加上吧！        if (multipartResolver.isMultipart(request)) {            //把request请求进行升级，request有的，它都有，            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;            /**             * String staffname = multiRequest.getParameter("staffname");             * 这样也可以获得上面从staffVo里面取出的值             */            //获得上传文件的名称            Iterator<String> iter = multiRequest.getFileNames();            //如果有的话就依次取出来            while (iter.hasNext()){                //包装过的文件流                MultipartFile file = multiRequest.getFile((String)iter.next());                //这里要进行判断，即使是空值，没有上传内容，file都是有值（空值）的，而文件流大小要大于0才是有上传的东西                if (file.getSize() > 0){                    //获得上传文件原始名                    String imagename = file.getOriginalFilename();                    //算出后缀名                    String ext = imagename.substring(imagename.lastIndexOf(".")) ;                    //对文件类型进行判断，这个操作也可以在前台进行处理，在前台进行处理比较好，前后台都进行处理最稳妥                    List<String> fileTypes = new ArrayList<String>();                    fileTypes.add(".jpg");                    fileTypes.add(".jpeg");                    fileTypes.add(".bmp");                    fileTypes.add(".gif");                    fileTypes.add(".png");                    //是图片再进行处理                    if (fileTypes.contains(ext.toLowerCase())){                        //文件名为：唯一的工号 + avatar + 系统时间 + 后缀                        String fileName = stjobnumber + "avatar" + System.currentTimeMillis() + ext ;                        //文件夹;String imagepath = request.getRealPath("/upload");过时的方法，用request.getSession().getServletContext()代替                        String avatarFolder = servletContext.getRealPath("/upload");                        File localFile = new File(avatarFolder,fileName);                        try {                            //直接写入到后台服务器，简单且快                            file.transferTo(localFile);                            staff.setStavatar(fileName);                            //保存资料到数据库中                            staffService.insertSelective(staff);                            outmap.put("success",true);                            outmap.put("msg","添加成功！");                            return outmap ;                        } catch (IOException e) {                            e.printStackTrace();                            outmap.put("success",false);                            outmap.put("msg","系统出错");                            return outmap ;                        }                    } else {                        outmap.put("success",false);                        outmap.put("msg","图片格式出错！");                        return outmap ;                    }                }            }        }        if (!hasUploadAvatar){            staffService.insertSelective(staff);            outmap.put("success",true);            outmap.put("msg","添加成功！");            return outmap ;        }        return null ;    }}

上传其他文件，把代码改一下就可以了……写这文章给自己做一个总结，也给其他人一个学习参考的选择。

自我总结的小技巧：文件上传，新建一个文件夹，比如upload。里面有个文件的话，部署后tomcat那边就有upload这个文件夹了，如果只是空的文件夹，部署可能不会自动生成，到时上传文件就找不到路径了。

 

上传文件要放入一个文件夹upload中，先前设置springMVC的默认访问路径都加上前缀和后缀，所以如果不记得加入以下这行代码的话，就会造成访问不了新上传的图片！

<!--允许静态资源访问-->

    <mvc:resources mapping="/upload/**" location="/upload/" />