Java简单上传图片例子

前台页面：

<form id="addform" method="post" enctype="multipart/form-data" action="${base}/action/addPhoPic">
<table border="0" class="perview" align="center">
        <a href="#" onClick="toaddpic()">上传至相册a>
        <tr>
            <th>选择文件th>
            <th width="50%">预览图th>
        tr>
        <tr>
            <td height="200"><input id="idFile" name="upload" type="file" />td>
            <td align="center"><img id="idImg" />td>
        tr>
table>
form>

Java后台处理：

    //与前台页面空间name一致
    private File upload;
    //反射，得到文件类型，文件名称
    private String uploadContentType;
    private String uploadFileName;
    public String doAddPhoPic(){
        //自己的PhotoService接口处理
        IPhotoService photoService=BeanFactory.getBean(BeanConstants.WB_PHOTO_SERVICE);
        Photo photo=new Photo();
        //这里简单的demo没有要把名字规范，也没有对图片有剪切或缩小处理，所以就简单的把上传的图片以1,2,3命名
        int count=photoService.queryPhotoList().size();
        count++;
        String file_path1="";
        String file_path2="";
        try {
            //上传至该项目所在本地目录
            file_path1=Constants.BASE_ROOT+"/fullsize"+"/"+count+".jpg";
            file_path2=Constants.BASE_ROOT+"/thumbs"+"/"+count+".jpg";
            photo.setPicName(photoService.queryPhotoList().size()+1+".jpg");
            photo.setPicUrl(file_path2);
            photoService.insertPhoto(photo);
            System.out.println("---"+file_path1);
            System.out.println("---"+file_path2);
            //对文件进行写操作
            FileOutputStream fos1=new FileOutputStream(file_path1);
            FileOutputStream fos2=new FileOutputStream(file_path2);
            //对文件进行读操作
            FileInputStream fis=new FileInputStream(upload);
            byte[] buffer=new byte[1024];
            int len=0;
            //读入流，保存至byte数组
            while((len=fis.read(buffer))>0){
                fos1.write(buffer,0,len);
                fos2.write(buffer,0,len);
            }
            fos1.close();
            fos2.close();
            fis.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        list=photoService.queryPhotoList();
        return SUCCESS;
    }