修正根据文章id查找username问题

src/com/hellogithub/dao/articleDao.java

@@ -104,9 +104,10 @@ public class articleDao {
         articleEntity entity = null;
         try{
             conn = JdbcUtils.getConnection();
+            preparedStatement.setInt(1, id);
             preparedStatement = conn.prepareStatement(sql);
             rs = preparedStatement.executeQuery();
-            preparedStatement.setInt(1, id);
+
             while(rs.next()){
                 int articleid = rs.getInt(1);
                 int userid = rs.getInt(2);
@@ -122,8 +123,9 @@ public class articleDao {
                 entity.setReadCount(readcount);
             }
             return entity;
-        } catch (SQLException e) {
-            throw new RuntimeException(e);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return entity;
         }
     }
 

src/com/hellogithub/service/articleService.java

@@ -65,8 +65,19 @@ public class articleService {
         return JSONObject.toJSONString(dataMap1);
     }
 
-    public articleEntity selectByArticleId(int id){
-        return articleDao.selectByArticleId(id);
+    public String selectByArticleId(int id){
+        Map<String,Object> dataMap = new HashMap<>();
+        articleEntity articleEntity = articleDao.selectByArticleId(id);
+        String username = userDao.selectNameById(id);
+        dataMap.put("ArticleContent",articleEntity.getArticleContent());
+        dataMap.put("ArticleId",articleEntity.getArticleId());
+        dataMap.put("ArticleTitle",articleEntity.getArticleTitle());
+        dataMap.put("IsValid",articleEntity.getIsValid());
+        dataMap.put("ReadCount",articleEntity.getReadCount());
+        dataMap.put("username",username);
+        dataMap.put("publishtime",articleEntity.getPublishTime());
+        dataMap.put("articleico",articleEntity.getArticleIco());
+        return JSONObject.toJSONString(dataMap);
     }
 
     public articleEntity updateReadCount(int id){

src/com/hellogithub/servlet/article/selectByArticleId.java

@@ -35,14 +35,14 @@ public class selectByArticleId extends HttpServlet {
 
 
         PrintWriter writer = resp.getWriter();
-        String articleid = req.getParameter("articleId");
+        String articleid = req.getParameter("id");
         int id = Integer.parseInt(articleid);
-        articleEntity entity = articleservice.selectByArticleId(id);
-        if(entity == null){
+        String jsonString = articleservice.selectByArticleId(id);
+        if(jsonString == null){
             setResultError("该文章id不存在或已失效", writer);
         }else{
-            String jsonString = JSONObject.toJSONString(entity);
             writer.println(jsonString);
+            writer.close();
         }
     }
     public void setResult(Integer code, String msg, PrintWriter writer) {