java 七牛上传图片到服务器(采用的html5 压缩 传输base64方式)

//html 页面如下
<
div class="form-group"> <label class="col-sm-2 control-label">上传头像</label> <div class="col-sm-6"> <input id="appHiddenMain" type="hidden" name="img" value="https://images.gagahi.com/images/default/male.png" /> <input type="file" id="photo" accept="image/*"> <img style="width:160px;" src="https://images.gagahi.com/images/default/male.png" id="imgd1" /> </div> </div> <script type="text/javascript"> $('#photo').change(function () { var _this = $(this)[0], _file = _this.files[0], fileType = _file.type; if (/image\/\w+/.test(fileType)) { //提示 var index = layer.open({ content: '图片上传中...' , skin: 'msg' }); var fileReader = new FileReader(); fileReader.readAsDataURL(_file); fileReader.onload = function (event) { var result = event.target.result; //返回的dataURL var image = new Image(); image.src = result; image.onload = function () { //创建一个image对象,给canvas绘制使用 var cvs = document.createElement('canvas'); var scale = 1; if (this.width > 1000 || this.height > 1000) { //1000只是示例,可以根据具体的要求去设定 if (this.width > this.height) { scale = 1000 / this.width; } else { scale = 1000 / this.height; } } cvs.width = this.width * scale; cvs.height = this.height * scale; //计算等比缩小后图片宽高 var ctx = cvs.getContext('2d'); ctx.drawImage(this, 0, 0, cvs.width, cvs.height); var newImageData = cvs.toDataURL(fileType, 0.8); //重新生成图片,<span style="font-family: Arial, Helvetica, sans-serif;">fileType为用户选择的图片类型</span> var sendData = newImageData.replace("data:" + fileType + ";base64,", ''); $.post('${base}/file/upload/sendImg.do', {imgCode: sendData}, function (data) { if (data != '') { $('.modify_img').attr('src', newImageData); $("#appHiddenMain").val(data); $("#imgd1").attr("src",data); layer.closeAll(); } else { layer.closeAll(); layer.open({ content: '上传失败' , skin: 'msg' }); } }); } } } else { layer.open({ content: '请选择图片格式文件' , skin: 'msg' }); } }); </script>

 

java代码如下

package com.aaa.qiniu;

import java.io.ByteArrayInputStream;
import java.io.IOException;

import com.qiniu.common.QiniuException;
import com.qiniu.common.Zone;
import com.qiniu.http.Response;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;
import com.aaa.utils.UUIDGenerator;

import sun.misc.BASE64Decoder;

public class CoverUpload {
    // 上传到七牛后保存的文件名
    //String key = "gagaTest.json";
    // 上传文件的路径
    //String filePath = "D:\\gagaTest.json";

    // 密钥配置
    private static Auth auth = Auth.create(QiniuConfig.ACCESS_KEY, QiniuConfig.SECRET_KEY);
    // 创建上传对象
    private static UploadManager uploadManager = new UploadManager(new Configuration(Zone.zone0()));

    // 覆盖上传
    private static String getUpToken(String key) {
        // <bucket>:<key>,表示只允许用户上传指定key的文件。在这种格式下文件默认允许“修改”,已存在同名资源则会被本次覆盖。
        // 如果希望只能上传指定key的文件,并且不允许修改,那么可以将下面的 insertOnly 属性值设为 1。
        // 第三个参数是token的过期时间
        return auth.uploadToken(QiniuConfig.bucketname, key/*, 3600, new StringMap().put("insertOnly", 1)*/);
    }

    public static boolean upload(String filePath, String key) throws IOException {
        try {
            // 调用put方法上传,这里指定的key和上传策略中的key要一致
            Response res = uploadManager.put(filePath, key, getUpToken(key));
            // 打印返回的信息
            System.out.println(res.bodyString());
        } catch (QiniuException e) {
            Response r = e.response;
            // 请求失败时打印的异常的信息
            System.out.println(r.toString());
            try {
                // 响应的文本信息
                System.out.println(r.bodyString());
            } catch (QiniuException e1) {
                // ignore
            }
            return false;
        }
        return true;
    }
    
    //采用的html5 压缩 传输base64方式
    public static boolean uploadHtml5(String imgStr,String key)
    {
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            //Base64解码
            byte[] b = decoder.decodeBuffer(imgStr);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {//调整异常数据
                    b[i] += 256;
                }
            }
            
            ByteArrayInputStream byteInputStream = new ByteArrayInputStream(b);
            // 调用put方法上传,这里指定的key和上传策略中的key要一致            
            Response response = uploadManager.put(byteInputStream, key, getUpToken(key), null, null);
            // 打印返回的信息
            System.out.println(response.bodyString());
        } catch (Exception e) {
            e.printStackTrace();
            // 请求失败时打印的异常的信息
            System.out.println(imgStr);
            return false;
        }
        return true;
    }

//    public static void main(String args[]) throws IOException {
//        new CoverUpload().upload("C:\\Users\\Administrator\\Desktop\\ip2222222.jpg","tianwenhui111333.jpg");
//    }
}

 

posted on 2017-06-14 16:34  算顺网  阅读(1844)  评论(0编辑  收藏  举报

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