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src/main/java/com/quinn/service/SourceCategoryService.java

@@ -0,0 +1,16 @@
+package com.quinn.service;
+
+import com.quinn.pojo.SourceCategory;
+import com.baomidou.mybatisplus.extension.service.IService;
+
+/**
+ * <p>
+ *  服务类
+ * </p>
+ *
+ * @author limqsh
+ * @since 2022-05-03
+ */
+public interface SourceCategoryService extends IService<SourceCategory> {
+
+}

src/main/java/com/quinn/service/SourceCommentService.java

@@ -1,6 +1,6 @@
 package com.quinn.service;
 
-import com.quinn.pojo.Say;
+import com.quinn.pojo.SourceComment;
 import com.baomidou.mybatisplus.extension.service.IService;
 
 /**
@@ -9,8 +9,8 @@ import com.baomidou.mybatisplus.extension.service.IService;
  * </p>
  *
  * @author limqsh
- * @since 2020-07-01
+ * @since 2022-05-03
  */
-public interface SayService extends IService<Say> {
+public interface SourceCommentService extends IService<SourceComment> {
 
 }

src/main/java/com/quinn/service/SourceService.java

@@ -0,0 +1,22 @@
+package com.quinn.service;
+
+import com.quinn.pojo.Source;
+import com.baomidou.mybatisplus.extension.service.IService;
+
+import javax.servlet.ServletOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * <p>
+ *  服务类
+ * </p>
+ *
+ * @author limqsh
+ * @since 2022-05-03
+ */
+public interface SourceService extends IService<Source> {
+
+    void downloadSource(ServletOutputStream outputStream, String sid) throws IOException;
+
+}

src/main/java/com/quinn/service/impl/SayServiceImpl.java

@@ -1,20 +0,0 @@
-package com.quinn.service.impl;
-
-import com.quinn.pojo.Say;
-import com.quinn.mapper.SayMapper;
-import com.quinn.service.SayService;
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
-import org.springframework.stereotype.Service;
-
-/**
- * <p>
- *  服务实现类
- * </p>
- *
- * @author limqsh
- * @since 2020-07-01
- */
-@Service
-public class SayServiceImpl extends ServiceImpl<SayMapper, Say> implements SayService {
-
-}

src/main/java/com/quinn/service/impl/SourceCategoryServiceImpl.java

@@ -0,0 +1,20 @@
+package com.quinn.service.impl;
+
+import com.quinn.pojo.SourceCategory;
+import com.quinn.mapper.SourceCategoryMapper;
+import com.quinn.service.SourceCategoryService;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import org.springframework.stereotype.Service;
+
+/**
+ * <p>
+ *  服务实现类
+ * </p>
+ *
+ * @author limqsh
+ * @since 2022-05-03
+ */
+@Service
+public class SourceCategoryServiceImpl extends ServiceImpl<SourceCategoryMapper, SourceCategory> implements SourceCategoryService {
+
+}

src/main/java/com/quinn/service/impl/SourceCommentServiceImpl.java

@@ -0,0 +1,20 @@
+package com.quinn.service.impl;
+
+import com.quinn.pojo.SourceComment;
+import com.quinn.mapper.SourceCommentMapper;
+import com.quinn.service.SourceCommentService;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import org.springframework.stereotype.Service;
+
+/**
+ * <p>
+ *  服务实现类
+ * </p>
+ *
+ * @author limqsh
+ * @since 2022-05-03
+ */
+@Service
+public class SourceCommentServiceImpl extends ServiceImpl<SourceCommentMapper, SourceComment> implements SourceCommentService {
+
+}

src/main/java/com/quinn/service/impl/SourceServiceImpl.java

@@ -0,0 +1,52 @@
+package com.quinn.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.quinn.pojo.Source;
+import com.quinn.mapper.SourceMapper;
+import com.quinn.service.SourceService;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.quinn.utils.OSSClientUtil;
+import org.springframework.stereotype.Service;
+
+import javax.annotation.Resource;
+import javax.servlet.ServletOutputStream;
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * <p>
+ *  服务实现类
+ * </p>
+ *
+ * @author limqsh
+ * @since 2022-05-03
+ */
+@Service
+public class SourceServiceImpl extends ServiceImpl<SourceMapper, Source> implements SourceService {
+
+    @Resource
+    OSSClientUtil ossClientUtil;
+
+    @Override
+    public void downloadSource(ServletOutputStream outputStream, String sid) throws IOException {
+        Source source = getOne(new QueryWrapper<Source>().eq("id", sid));
+        String sourceLink = source.getSourceLink();
+        // 读取文件内容。
+        BufferedInputStream in = new BufferedInputStream(ossClientUtil.downloadFile(sourceLink));
+        BufferedOutputStream out = new BufferedOutputStream(outputStream);
+        byte[] buffer = new byte[1024];
+        int lenght = 0;
+        while ((lenght = in.read(buffer)) != -1) {
+            out.write(buffer, 0, lenght);
+        }
+        if (out != null) {
+            out.flush();
+            out.close();
+        }
+        if (in != null) {
+            in.close();
+        }
+    }
+}