增加平均星数

src/com/hellogithub/service/projectService.java

@@ -12,6 +12,7 @@ import com.hellogithub.entity.commentEntity;
 import com.hellogithub.entity.projectEntity;
 import com.hellogithub.entity.supportEntity;
 
+import java.math.BigDecimal;
 import java.util.*;
 
 
@@ -158,7 +159,9 @@ public class projectService {
                 sum +=commentEntityList.get(i).getStar();
             }
             double average = sum/commentEntityList.size();
-            projectEntity.setAverage(average);
+            BigDecimal two = new BigDecimal(average);
+            double three = two.setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();
+            projectEntity.setAverage(three);
         }
        else{
             projectEntity.setAverage(0);

src/com/hellogithub/servlet/selectProByIdServlet.java

@@ -43,6 +43,7 @@ public class selectProByIdServlet extends HttpServlet {
         int num = projectService.addProjectLookcount(id);
         PrintWriter writer = resp.getWriter();
         String dataMap = projectService.retProjectLabel(id);
+
         JSONObject jsonObject =  JSON.parseObject(dataMap);
         jsonObject.put("project",projectService.selectProById(id));
         writer.println(JSONObject.toJSONString(jsonObject));