first commit

pom.xml

 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>org.junit.vintage</groupId>
+					<artifactId>junit-vintage-engine</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+
+		<!--mysql start-->
 		<dependency>
 			<groupId>mysql</groupId>
 			<artifactId>mysql-connector-java</artifactId>
 			<scope>runtime</scope>
 		</dependency>
+		<!--mysql end-->
 
+		<!--mybatis-plus start-->
 		<dependency>
 			<groupId>com.baomidou</groupId>
 			<artifactId>mybatis-plus-boot-starter</artifactId>
 			<version>3.1.1</version>
 		</dependency>
+		<!--mybatis-plus end-->
+
+		<!--fastjson start-->
 		<dependency>
 			<groupId>com.alibaba</groupId>
 			<artifactId>fastjson</artifactId>
 			<version>1.2.56</version>
 		</dependency>
+		<!--fastjson end-->
 
+		<!--jwt start-->
 		<dependency>
 			<groupId>io.jsonwebtoken</groupId>
 			<artifactId>jjwt-api</artifactId>
 			<version>0.11.2</version>
 			<scope>runtime</scope>
 		</dependency>
+		<!--jwt end-->
 
+		<!--oss start-->
 		<dependency>
 			<groupId>com.aliyun.oss</groupId>
 			<artifactId>aliyun-sdk-oss</artifactId>
 			<version>2.8.3</version>
 		</dependency>
+		<!--oss end-->
+
+		<!--excel start-->
+		<dependency>
+			<groupId>com.alibaba</groupId>
+			<artifactId>easyexcel</artifactId>
+			<version>2.0.4</version>
+		</dependency>
+		<!--excel end-->
+
+		<!--weixin-miniapp start-->
 		<dependency>
 			<groupId>com.github.binarywang</groupId>
 			<artifactId>weixin-java-miniapp</artifactId>
 			<version>3.8.0</version>
 		</dependency>
+		<!--weixin-miniapp start-->
+
+		<!--lombok start-->
 		<dependency>
 			<groupId>org.projectlombok</groupId>
 			<artifactId>lombok</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<!--lombok end-->
 
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-test</artifactId>
-			<scope>test</scope>
-			<exclusions>
-				<exclusion>
-					<groupId>org.junit.vintage</groupId>
-					<artifactId>junit-vintage-engine</artifactId>
-				</exclusion>
-			</exclusions>
-		</dependency>
-
+		<!--swagger start-->
 		<dependency>
 			<groupId>io.springfox</groupId>
 			<artifactId>springfox-boot-starter</artifactId>
 			<version>3.0.0</version>
 		</dependency>
+		<!--swagger end-->
 	</dependencies>
 
 	<profiles>

src/main/java/com/yunzhi/niucai/common/ExcelUtils.java

+package com.yunzhi.niucai.common;
+
+import com.alibaba.excel.EasyExcel;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.List;
+
+public class ExcelUtils {
+
+    /**
+     * 发送 excel 到客户端
+     * 暂时只支持单 sheet 页
+     * @param response
+     * @param data
+     * @param fileName
+     * @throws IOException
+     */
+    public static void flush(HttpServletResponse response, Class dataClass, List data, String fileName) throws IOException {
+        response.setContentType("application/vnd.ms-excel");
+        response.setCharacterEncoding("utf-8");
+        response.setHeader("Content-disposition", "attachment;filename="+StringUtils.urlEncode(fileName)+".xlsx");
+
+        EasyExcel.write(response.getOutputStream(), dataClass).sheet("sheet1").doWrite(data);
+    }
+}

src/main/java/com/yunzhi/niucai/common/OSSUtils.java

+package com.yunzhi.niucai.common;
+
+import com.aliyun.oss.OSSClient;
+import com.yunzhi.niucai.config.AliyunConfig;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.*;
+
+@Component
+public class OSSUtils {
+
+    @Autowired
+    AliyunConfig aliyunConfig;
+
+    /**
+     * 上传文件
+     * @param mf 上传的文件
+     * @param toDirs 上传到的目录
+     * @return
+     */
+    public String putObject(MultipartFile mf, String ... toDirs) throws IOException {
+        String fName = formatFileName(mf.getOriginalFilename());
+        String preFix = String.valueOf(System.currentTimeMillis());
+        String toDir = "/";
+        if (null != toDirs && toDirs.length > 0) {
+            toDir = toDirs[0];
+        }
+        String nwFName = toDir + preFix + "-" + fName;
+        nwFName = StringUtils.trim(nwFName,"/");
+
+        return putFile(nwFName, new ByteArrayInputStream(mf.getBytes()));
+    }
+
+    public String putObject(File f, String ... toDirs) throws FileNotFoundException {
+        String fName = formatFileName(f.getName());
+        String preFix = String.valueOf(System.currentTimeMillis());
+        String toDir = "/";
+        if (null != toDirs && toDirs.length > 0) {
+            toDir = toDirs[0];
+        }
+        String nwFName = toDir + preFix + "-" + fName;
+        nwFName = StringUtils.trim(nwFName,"/");
+
+        InputStream inputStream = new FileInputStream(f);
+        return putFile(nwFName, inputStream);
+    }
+
+    private String formatFileName(String fName) {
+        return StringUtils.ifNull(fName, StringUtils.random(16) + ".png");
+    }
+
+    private String putFile(String fname, InputStream input) {
+        OSSClient ossClient = new OSSClient(aliyunConfig.getOss().getEndpoint(), aliyunConfig.getAccessKeyId(), aliyunConfig.getAccessKeySecret());
+        ossClient.putObject(aliyunConfig.getOss().getBucketName(), fname, input);
+        ossClient.shutdown();
+
+        // String url = ossClient.generatePresignedUrl(AliOSSUtils.oss.getBucketName(), fname, expiration).toString();
+
+        String preURL = aliyunConfig.getOss().getBucketURL();
+        if (!preURL.endsWith("/")) {
+            preURL += "/";
+        }
+
+        return preURL + fname.replaceAll("\\ ", "%20");
+    }
+}