添加文章类相关代码
This commit is contained in:
94
src/com/hellogithub/dao/articleDao.java
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94
src/com/hellogithub/dao/articleDao.java
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package com.hellogithub.dao;
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import com.hellogithub.entity.articleEntity;
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import com.hellogithub.entity.projectEntity;
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import com.hellogithub.entity.userEntity;
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import com.hellogithub.utils.JdbcUtils;
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import org.apache.commons.dbutils.QueryRunner;
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import org.apache.commons.dbutils.ResultSetHandler;
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import org.apache.commons.dbutils.handlers.BeanListHandler;
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import java.sql.*;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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public class articleDao {
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private articleEntity articleEntity = new articleEntity();
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/**
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按照最新排序文章
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*/
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public List<articleEntity> ArticleSortBylast(){
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Connection conn = null;
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PreparedStatement preparedStatement = null;
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ResultSet rs = null;
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String sql = "SELECT * FROM `article` ORDER BY publishTime DESC;";
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ArrayList<com.hellogithub.entity.articleEntity> articleEntities = new ArrayList<articleEntity>();
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try {
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conn = JdbcUtils.getConnection();
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preparedStatement = conn.prepareStatement(sql);
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rs = preparedStatement.executeQuery();
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while (rs.next()) {
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int articleid = rs.getInt(1);
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int userid = rs.getInt(2);
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String articlecontent = rs.getString(3);
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String datetime = rs.getString(4);
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int isvalid = rs.getInt(5);
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int readcount = rs.getInt(6);
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articleEntity entity = new articleEntity(articleid, userid, articlecontent, datetime, isvalid, readcount);
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articleEntities.add(entity);
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}
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return articleEntities;
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}catch(Exception e){
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e.printStackTrace();
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}finally{
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try{
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conn.close();
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preparedStatement.close();
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rs.close();
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}catch(Exception e) {
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e.printStackTrace();
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}
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}return articleEntities;
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}
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/**
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* 按浏览量最多排序文章
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* @return
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*/
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public List<articleEntity> ArticleSortByhot(){
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Connection conn = null;
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PreparedStatement preparedStatement = null;
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ResultSet rs = null;
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String sql = "SELECT * FROM `article` ORDER BY readCount DESC";
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ArrayList<com.hellogithub.entity.articleEntity> articleEntities = new ArrayList<articleEntity>();
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try {
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conn = JdbcUtils.getConnection();
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preparedStatement = conn.prepareStatement(sql);
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rs = preparedStatement.executeQuery();
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while (rs.next()) {
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int articleid = rs.getInt(1);
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int userid = rs.getInt(2);
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String articlecontent = rs.getString(3);
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String datetime = rs.getString(4);
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int isvalid = rs.getInt(5);
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int readcount = rs.getInt(6);
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articleEntity entity = new articleEntity(articleid, userid, articlecontent, datetime, isvalid, readcount);
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articleEntities.add(entity);
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}
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return articleEntities;
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}catch(Exception e){
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e.printStackTrace();
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}finally{
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try{
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conn.close();
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preparedStatement.close();
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rs.close();
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}catch(Exception e) {
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e.printStackTrace();
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}
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}return articleEntities;
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}
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}
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@@ -1,11 +1,28 @@
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package com.hellogithub.entity;
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public class articleEntity {
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public articleEntity(){} //无参构造函数
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public articleEntity(int articleId,int userId,String articleContent,String publishTime,int isValid,int readCount){
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this.articleId = articleId;
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this.userId = userId;
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this.articleContent = articleContent;
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this.publishTime = publishTime;
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this.isValid = isValid;
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this.readCount = readCount;
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}
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int articleId;
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int userId;
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String articleContent;
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String publishTime;
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int isValid;
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int readCount;
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public int getArticleId() {
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return articleId;
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}
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@@ -46,9 +63,7 @@ public class articleEntity {
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this.isValid = isValid;
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}
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String articleContent;
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String publishTime;
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int isValid;
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public int getReadCount(){return readCount;}
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public void setReadCount(int readCount){this.readCount = readCount;}
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}
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23
src/com/hellogithub/service/articleService.java
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23
src/com/hellogithub/service/articleService.java
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package com.hellogithub.service;
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import com.hellogithub.dao.articleDao;
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import com.hellogithub.entity.articleEntity;
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import java.util.List;
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public class articleService {
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public articleService(){
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}
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public List<articleEntity> ArticleSortBylast(){
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articleDao articleDao = new articleDao();
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return articleDao.ArticleSortBylast();
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}
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public List<articleEntity> ArticleSortByhot(){
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articleDao articleDao = new articleDao();
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return articleDao.ArticleSortByhot();
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}
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}
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69
src/com/hellogithub/servlet/article/articleSortServlet.java
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69
src/com/hellogithub/servlet/article/articleSortServlet.java
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package com.hellogithub.servlet.article;
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import com.alibaba.fastjson.JSONObject;
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import com.hellogithub.entity.articleEntity;
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import com.hellogithub.service.articleService;
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import jakarta.servlet.ServletException;
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import jakarta.servlet.annotation.WebServlet;
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import jakarta.servlet.http.HttpServlet;
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import jakarta.servlet.http.HttpServletRequest;
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import jakarta.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.lang.reflect.Array;
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import java.util.HashMap;
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import java.util.List;
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/**
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* 最新时间排序文章
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*/
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@WebServlet("/articleSort")
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public class articleSortServlet extends HttpServlet {
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protected articleService articleservice = new articleService();
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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doPost(req, resp);
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}
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@Override
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protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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resp.setCharacterEncoding("UTF-8");
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// 设置响应头允许ajax跨域访问
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String curOrigin = req.getHeader("Origin");
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resp.setHeader("Access-Control-Allow-Origin", curOrigin == null ? "true" : curOrigin);
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resp.setHeader("Access-Control-Allow-Credentials", "true");
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resp.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD");
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resp.setHeader("Access-Control-Max-Age", "3600");
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resp.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With");
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resp.setContentType("application/json;charset=UTF-8");
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// 传入参数?sort_by = last 或者?sort_by = hot 默认是last界面
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PrintWriter writer = resp.getWriter();
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List<articleEntity> articleEntityListLast = articleservice.ArticleSortBylast();
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List<articleEntity> articleEntityListHot = articleservice.ArticleSortByhot();
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String sortby = req.getParameter("sort_by");
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String jsonString1 = JSONObject.toJSONString(articleEntityListLast);
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String jsonString2 = JSONObject.toJSONString(articleEntityListHot);
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if ("last".equals(sortby)) {
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writer.println(jsonString1);
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}else if("hot".equals(sortby)){
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writer.println(jsonString2);
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}else{
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setResultError("false", writer);
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}
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writer.close();
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}
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public void setResult(Integer code, String msg, PrintWriter writer) {
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HashMap<String, Object> result = new HashMap<>();
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result.put("code", code);
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result.put("msg", msg);
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String jsonString = JSONObject.toJSONString(result);
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writer.println(jsonString);
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writer.close();
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}
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public void setResultError(String msg, PrintWriter writer) {
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setResult(500, msg, writer);
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}
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}
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