第一步，引入maven依赖。
<!-- 七牛云 --> <dependency> <groupId>com.qiniu</groupId> <artifactId>qiniu-java-sdk</artifactId> <version>[7.2.0, 7.2.99]</version> </dependency>
第二步，创建QiniuController.java。
package com.allen.blog.controller;
import com.allen.blog.util.QiniuUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
@Controller
@RequestMapping("allenblog/Qiniu")
public class QiniuController {
@RequestMapping(value = "/qiniuUpLoadImage", method = RequestMethod.POST)
@ResponseBody
public Map<String, Object> qiniuUpLoadImage(HttpServletRequest request, @RequestParam("file") MultipartFile multipartFile) throws IOException {
Map<String, Object> root = new HashMap<String, Object>();
if (!multipartFile.isEmpty()) {
String fileType = multipartFile.getContentType();
if (fileType.equals("image/jpeg") || fileType.equals("image/png") || fileType.equals("image/jpg")) {
FileInputStream inputStream = (FileInputStream) multipartFile.getInputStream();
String uuid = UUID.randomUUID().toString();
String path = QiniuUtil.uploadQNImg(inputStream, uuid); // KeyUtil.genUniqueKey()生成图片的随机名
System.out.println("七牛云返回的图片链接:" + path);
root.put("name", path);
root.put("url", path);//前端根据是否存在该字段来判断上传是否成功
root.put("result_msg", "图片上传成功");
return root;
}else{
root.put("result_msg", "图片格式不正确");
System.out.println("图片格式不正确");
}
}
root.put("result_msg", "图片上传失败");
return root;
}
}第三步，创建QiniuUtil.java。
package com.allen.blog.util;
import com.google.gson.Gson;
import com.qiniu.common.QiniuException;
import com.qiniu.common.Zone;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.Region;
import com.qiniu.storage.UploadManager;
import com.qiniu.storage.model.DefaultPutRet;
import com.qiniu.util.Auth;
import java.io.FileInputStream;
/**
* 七牛云图片操作工具类, 写在服务端
*/
public class QiniuUtil {
// 设置需要操作的账号的AK和SK
private static final String ACCESS_KEY = "************************";
private static final String SECRET_KEY = "************************";
// 要上传的空间名称
private static final String BUCKETNAME = "************************";
// 密钥
private static final Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
// 外链默认域名
private static final String DOMAIN = "http://************************";
/**
* 将图片上传到七牛云
*/
public static String uploadQNImg(FileInputStream file, String key) {
// 构造一个带指定Zone对象的配置类, 注意这里的Zone.zone0需要根据主机选择
Configuration cfg = new Configuration(Zone.zone0());
// 其他参数参考类注释
UploadManager uploadManager = new UploadManager(cfg);
// 生成上传凭证，然后准备上传
try {
Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
String upToken = auth.uploadToken(BUCKETNAME);
try {
Response response = uploadManager.put(file, key, upToken, null, null);
// 解析上传成功的结果
DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
String returnPath = DOMAIN + "/" + putRet.key;
// 这个returnPath是获得到的外链地址,通过这个地址可以直接打开图片
return returnPath;
} catch (QiniuException ex) {
Response r = ex.response;
System.err.println(r.toString());
try {
System.err.println(r.bodyString());
} catch (QiniuException ex2) {
//ignore
}
}
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
/**
* 通过key删除七牛云上的图片
*/
public void delete(String key) throws QiniuException {
Configuration cfg = new Configuration(Region.region0());
Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
BucketManager bucketManager = new BucketManager(auth, cfg);
try {
bucketManager.delete("liqinglin0314", key);
} catch (QiniuException ex) {
//如果遇到异常，说明删除失败
System.err.println(ex.code());
System.err.println(ex.response.toString());
}
}
}这样就可以上传图片到七牛云啦。