Struts2 上传文件（1）

 参考资料：

http://www.cnblogs.com/linjiqin/archive/2011/03/21/1990674.html

效果图：

src/struts.xml（节选）

    <!-- 
        请求路径 /projectName/upload/upload.do
        相当于 namespace + action name
        这种方法好，与类的路径相一至。
     -->
    <package name="upload" namespace="/upload" extends="struts-default">
        <!-- <action name="*_upload" class="labratory.fileUpload.Action" method="{1}"> -->
        <action name="upload" class="labratory.fileUpload.Action" method="execute">
            <result name="success">/WEB-INF/page/message.jsp</result>
        </action>
    </package>

WebContent/labratory/testFileUpload.js ( 节选 )

var createUploadForm = function(){
    
    // http://localhost:8080/ExtJS/docs/index.html#!/api/Ext.form.Panel
    Ext.create('Ext.form.Panel', {
        title: 'Simple Form',
        bodyPadding: 5,
        draggable: true ,
        collapsible: true ,
        resizable: true ,
         350,
        margin: 10 ,

        // The form will submit an AJAX request to this URL when submitted
        // url: 'save-form.php',
        // url: '/taskEvaluate/upload2.do' ,
        // url:  '/taskEvaluate/upload.do' ,
        url:  '/taskEvaluate/upload/upload.do' ,

        // Fields will be arranged vertically, stretched to full width
        layout: 'anchor',
        defaults: {
            anchor: '100%'
        },

        // The fields
        defaultType: 'textfield',
        items: [{
            fieldLabel: 'First Name',
            name: 'firstName',
            value: 'firstName' ,
            allowBlank: false
        },{
            fieldLabel: 'Last Name',
            name: 'lastName',
            value: 'lastName' ,
            allowBlank: false
        } ,
        {
            // http://localhost:8080/ExtJS/docs/index.html#!/api/Ext.form.field.File
            xtype: 'filefield',
            // name: 'photo',
            // name: 'imageFileName' ,
            name: 'image' ,
            fieldLabel: 'Photo',
            labelWidth: 50,
            msgTarget: 'side',
            allowBlank: false,
            anchor: '100%',
            buttonText: 'Select Photo...'
        }
        
        ],

        // Reset and Submit buttons
        buttons: [{
            text: 'Reset',
            handler: function() {
                this.up('form').getForm().reset();
            }
        }, {
            text: 'Submit',
            formBind: true, //only enabled once the form is valid
            disabled: true,
            handler: function() {
                var form = this.up('form').getForm();
                if (form.isValid()) {
                    form.submit({
                        success: function(form, action) {
                           Ext.Msg.alert('Success', action.result.msg) ;
                        },
                        failure: function(form, action) {
                            Ext.Msg.alert('Failed', action.result.msg) ;
                        }
                    });
                }
            }
        }],
        renderTo: Ext.getBody()
    });
    
} ;

 src/labratory/fileUpload/Action.java

package labratory.fileUpload;

import java.io.File;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class Action extends ActionSupport{
    
    private File image ; //上传的文件
    private String imageFileName; //文件名称
    private String imageContentType; //文件类型

    private String firstName ;
    private String lastName ;

    public String execute() throws Exception {
        
        // String realpath = ServletActionContext.getServletContext().getRealPath("/images");
        /*
         *   注意：目录 WebContent/media 一定要存在，文件将会保存在服务器的这个目录下
         *   可以直接指定其它的存在的路径，比如： d:\myImageFilesIsHere
         */
        String realpath = ServletActionContext.getServletContext().getRealPath("/media");
        // D:\apache-tomcat-6.0.18\webapps\struts2_upload\images
        System.out.println("realpath: "+realpath );
        
        if ( image != null ) {
            // 保存的文件
            File savefile = new File( new File( realpath ), imageFileName );
            
            // 如果路径不存在则创建
            if ( !savefile.getParentFile().exists() )
                savefile.getParentFile().mkdirs();
            
            // 拷贝文件
            FileUtils.copyFile( image, savefile );
            
            // http://blog.csdn.net/smcfy/article/details/5693481
            ActionContext.getContext().put("message", "文件上传成功");
        }
        return "success";
    }

    
    
    /*
     *  - - - - - - - - - - - - - - - - - - - - - - - - - - - 
     *  getters and setters
     *  - - - - - - - - - - - - - - - - - - - - - - - - - - - 
     */    
    
    public File getImage() {
        return image;
    }

    public void setImage(File image) {
        this.image = image;
    }

    public String getImageFileName() {
        return imageFileName;
    }

    public void setImageFileName(String imageFileName) {
        this.imageFileName = imageFileName;
    }

    public String getImageContentType() {
        return imageContentType;
    }

    public void setImageContentType(String imageContentType) {
        this.imageContentType = imageContentType;
    }



    public String getFirstName() {
        return firstName;
    }



    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }



    public String getLastName() {
        return lastName;
    }



    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    
    
}