Bootstrap4+MySQL前后端综合实训-Day08-PM【ajax获取表单标签内容、根据“栏目信息”添加“新闻信息”、新闻管理系统-项目展示】

客官°小女子只卖身不卖艺 2022-12-23 15:20 117阅读 0赞

> [【Bootstrap4前端框架+MySQL数据库】前后端综合实训【10天课程 博客汇总表 详细笔记】【附：实训所有代码】][Bootstrap4_MySQL_10_ _]

***目   录***

ajax获取表单标签内容

ajax根据数据库加载select下来列表框的options

根据“栏目信息”添加“新闻信息”

news\_manager.html

AddNewsServlet.java

新闻管理系统后台数据（SQL语句）

eclipse导入Web项目代码报错解决方案

新闻管理系统——项目展示

“新闻管理”栏目

--------------------

# ajax获取表单标签内容 #

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70][]

# ajax根据数据库加载select下来列表框的options #

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 1][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 2][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 3][]

# 根据“栏目信息”添加“新闻信息” #

> 报错信息：Cannot add or update a child row: a foreign key constraint fails (\`zykkk\`.\`news\_info\`, CONSTRAINT \`FK\_Reference\_4\` FOREIGN KEY (\`item\_id\`) REFERENCES \`new\_item\` (\`item\_id\`))
> 
> ![20201126000551119.png][]

## news\_manager.html ##

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 4][]

## AddNewsServlet.java ##

package com.newcapec.servlet.news;
    
    import java.io.IOException;
    import java.sql.SQLException;
    import java.util.HashMap;
    
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import com.alibaba.fastjson.JSON;
    import com.newcapec.dao.NewsInfoDao;
    import com.newcapec.entity.NewsInfoEntity;
    
    /**
     * Servlet implementation class AddNewsServlet
     */
    @WebServlet(name = "/AddNewsServlet", urlPatterns = "/AddNewsServlet")
    public class AddNewsServlet extends HttpServlet {
    
    	private static final long serialVersionUID = 1L;
    	private NewsInfoDao newsInfoDao = new NewsInfoDao();
    
    	/**
    	 * @see HttpServlet#HttpServlet()
    	 */
    	public AddNewsServlet() {
    		super();
    		// TODO Auto-generated constructor stub
    	}
    
    	/**
    	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
    	 *      response)
    	 */
    	protected void doGet(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    		// TODO Auto-generated method stub
    		response.getWriter().append("Served at: ").append(request.getContextPath());
    	}
    
    	/**
    	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
    	 *      response)
    	 */
    	protected void doPost(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    		// TODO Auto-generated method stub
    		// doGet(request, response);
    		request.setCharacterEncoding("utf-8");
    		response.setContentType("text/json;charset=utf-8");
    		String addNewsTitle = request.getParameter("addNewsTitle");
    		String addNewsItem = request.getParameter("addNewsItem"); // 栏目id
    		String addNewsContent = request.getParameter("addNewsContent");
    		NewsInfoEntity newsInfoEntity = new NewsInfoEntity();
    		newsInfoEntity.setNewsTitle(addNewsTitle);
    		newsInfoEntity.setItemId(Integer.parseInt(addNewsItem));
    		newsInfoEntity.setNewsContent(addNewsContent);
    		try {
    			boolean flag = newsInfoDao.insert(newsInfoEntity);
    			HashMap<String, Boolean> result = new HashMap<>();
    			result.put("flag", flag);
    			response.getWriter().write(JSON.toJSONString(result));
    		} catch (ClassNotFoundException | SQLException e) {
    			// TODO 自动生成的 catch 块
    			e.printStackTrace();
    		}
    	}
    
    }

# 新闻管理系统后台数据（SQL语句） #

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 5][]

/*
    SQLyog Ultimate v12.08 (64 bit)
    MySQL - 8.0.20 : Database - zykkk
    *********************************************************************
    */
    
    
    /*!40101 SET NAMES utf8 */;
    
    /*!40101 SET SQL_MODE=''*/;
    
    /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
    /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
    /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
    /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
    CREATE DATABASE /*!32312 IF NOT EXISTS*/`zykkk` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci */ /*!80016 DEFAULT ENCRYPTION='N' */;
    
    USE `zykkk`;
    
    /*Table structure for table `item_user` */
    
    DROP TABLE IF EXISTS `item_user`;
    
    CREATE TABLE `item_user` (
      `item_user_id` int NOT NULL AUTO_INCREMENT,
      `user_id` int DEFAULT NULL,
      `item_id` int DEFAULT NULL,
      `create_time` datetime DEFAULT NULL COMMENT '创建时间',
      `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间',
      `status` int DEFAULT '1' COMMENT '1：启用 0：禁用',
      PRIMARY KEY (`item_user_id`),
      KEY `FK_Reference_2` (`user_id`),
      KEY `FK_Reference_3` (`item_id`),
      CONSTRAINT `FK_Reference_2` FOREIGN KEY (`user_id`) REFERENCES `user_info` (`user_id`),
      CONSTRAINT `FK_Reference_3` FOREIGN KEY (`item_id`) REFERENCES `new_item` (`item_id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_hungarian_ci;
    
    /*Data for the table `item_user` */
    
    insert  into `item_user`(`item_user_id`,`user_id`,`item_id`,`create_time`,`update_time`,`status`) values (1,1,2,'2020-11-23 11:24:16','2020-11-25 10:27:54',1),(2,2,4,NULL,'2020-11-25 09:38:17',1),(3,1,1,'2020-11-24 09:19:58','2020-11-25 09:38:21',1),(5,1,18,NULL,'2020-11-25 09:44:16',1),(6,1,27,'2020-11-25 11:11:35','2020-11-25 11:11:35',1),(7,1,28,'2020-11-25 11:17:59','2020-11-25 11:17:59',1),(8,1,29,'2020-11-25 11:29:14','2020-11-25 11:29:14',1),(9,1,30,'2020-11-25 11:30:54','2020-11-25 11:30:54',1),(10,1,31,'2020-11-25 11:36:51','2020-11-25 11:36:51',1),(11,1,32,'2020-11-25 16:26:23','2020-11-25 16:26:23',1),(12,1,33,'2020-11-25 16:26:37','2020-11-25 16:26:37',1);
    
    /*Table structure for table `logs_info` */
    
    DROP TABLE IF EXISTS `logs_info`;
    
    CREATE TABLE `logs_info` (
      `logs_id` int NOT NULL AUTO_INCREMENT,
      `user_id` int DEFAULT NULL,
      `logs_content` text CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci,
      `create_time` datetime DEFAULT NULL COMMENT '创建时间',
      `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间',
      PRIMARY KEY (`logs_id`),
      KEY `FK_Reference_1` (`user_id`),
      CONSTRAINT `FK_Reference_1` FOREIGN KEY (`user_id`) REFERENCES `user_info` (`user_id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=17 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_hungarian_ci;
    
    /*Data for the table `logs_info` */
    
    insert  into `logs_info`(`logs_id`,`user_id`,`logs_content`,`create_time`,`update_time`) values (1,1,NULL,NULL,'2020-11-24 09:27:05'),(2,2,NULL,NULL,'2020-11-24 09:27:12'),(3,4,NULL,NULL,'2020-11-23 11:29:06'),(14,1,'woshishenren','2020-11-24 09:24:52','2020-11-24 09:24:52'),(15,1,'woshishenren','2020-11-24 09:25:58','2020-11-24 09:25:58');
    
    /*Table structure for table `new_item` */
    
    DROP TABLE IF EXISTS `new_item`;
    
    CREATE TABLE `new_item` (
      `item_id` int NOT NULL AUTO_INCREMENT,
      `item_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci NOT NULL,
      `create_time` datetime DEFAULT NULL COMMENT '创建时间',
      `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间',
      `status` int DEFAULT '1' COMMENT '1：启用 0：禁用',
      PRIMARY KEY (`item_id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=34 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_hungarian_ci;
    
    /*Data for the table `new_item` */
    
    insert  into `new_item`(`item_id`,`item_name`,`create_time`,`update_time`,`status`) values (1,'学生会','2020-11-24 15:47:00','2020-11-25 14:44:37',1),(2,'党支部','2020-11-24 15:47:03','2020-11-25 14:44:31',0),(3,'分团委','2020-11-24 15:47:05','2020-11-25 14:43:54',1),(4,'院团委','2020-11-24 15:47:08','2020-11-25 14:44:38',1),(5,'111','2020-11-23 15:22:54','2020-11-25 14:45:55',1),(6,'学生会','2020-11-24 09:27:36','2020-11-25 14:46:01',1),(8,'党支部','2020-11-24 13:51:13','2020-11-25 14:46:07',1),(18,'党支部','2020-11-25 09:11:51','2020-11-25 15:49:06',1),(19,'院团委','2020-11-25 10:42:54','2020-11-25 14:46:16',1),(20,'111','2020-11-25 10:54:12','2020-11-25 14:46:19',1),(21,'学生会','2020-11-25 10:56:21','2020-11-25 14:46:35',1),(22,'党支部','2020-11-25 10:57:35','2020-11-25 14:46:43',1),(23,'分团委','2020-11-25 11:00:20','2020-11-25 14:46:48',1),(24,'院团委','2020-11-25 11:00:47','2020-11-25 14:46:55',1),(25,'qweqwe','2020-11-25 11:01:37','2020-11-25 11:01:37',1),(26,'eqweqweqwe','2020-11-25 11:01:53','2020-11-25 11:01:53',1),(27,'分团委','2020-11-25 11:11:35','2020-11-25 15:49:18',1),(28,'sadsads','2020-11-25 11:17:59','2020-11-25 11:18:40',0),(29,'院团委','2020-11-25 11:29:13','2020-11-25 15:49:25',1),(30,'789','2020-11-25 11:30:54','2020-11-25 11:37:19',0),(31,'zyk','2020-11-25 11:36:51','2020-11-25 11:37:19',0),(32,'琨家军委员会','2020-11-25 16:26:23','2020-11-25 16:26:30',0),(33,'委员会','2020-11-25 16:26:37','2020-11-25 22:42:25',1);
    
    /*Table structure for table `news_info` */
    
    DROP TABLE IF EXISTS `news_info`;
    
    CREATE TABLE `news_info` (
      `new_id` int NOT NULL AUTO_INCREMENT,
      `item_id` int DEFAULT NULL,
      `news_title` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci NOT NULL,
      `news_image` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci DEFAULT NULL,
      `news_content` text CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci,
      `create_time` datetime DEFAULT NULL COMMENT '创建时间',
      `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间',
      PRIMARY KEY (`new_id`),
      KEY `FK_Reference_4` (`item_id`),
      CONSTRAINT `FK_Reference_4` FOREIGN KEY (`item_id`) REFERENCES `new_item` (`item_id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_hungarian_ci;
    
    /*Data for the table `news_info` */
    
    insert  into `news_info`(`new_id`,`item_id`,`news_title`,`news_image`,`news_content`,`create_time`,`update_time`) values (1,2,'蓝桥杯比赛',NULL,NULL,NULL,'2020-11-23 09:27:39'),(2,3,'新学期学费',NULL,NULL,NULL,'2020-11-23 09:28:10'),(3,1,'拔河比赛',NULL,'拔河比赛要使劲！！！','2020-11-25 14:57:28','2020-11-25 14:57:32'),(4,18,'街舞比赛',NULL,'一起摇摆~','2020-11-25 15:54:09','2020-11-25 15:54:11'),(10,27,'数学建模',NULL,'一起加油！','2020-11-25 16:10:02','2020-11-25 22:17:19'),(11,29,'班班唱',NULL,'《走向复兴》','2020-11-25 16:12:23','2020-11-25 16:12:23'),(12,1,'篮球比赛',NULL,'冲冲冲~','2020-11-25 16:13:04','2020-11-25 16:13:04'),(13,1,'大英竞赛NECCS',NULL,'冲呀~','2020-11-25 16:27:22','2020-11-25 22:17:45'),(14,18,'卓见杯',NULL,'啦啦啦~','2020-11-25 17:41:32','2020-11-25 22:17:56');
    
    /*Table structure for table `user_info` */
    
    DROP TABLE IF EXISTS `user_info`;
    
    CREATE TABLE `user_info` (
      `user_id` int NOT NULL AUTO_INCREMENT,
      `user_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci NOT NULL,
      `user_pwd` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_hungarian_ci NOT NULL,
      `create_time` datetime DEFAULT NULL COMMENT '创建时间',
      `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间',
      `status` int DEFAULT '1' COMMENT '1:启用 0：禁用',
      PRIMARY KEY (`user_id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=116 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_hungarian_ci;
    
    /*Data for the table `user_info` */
    
    insert  into `user_info`(`user_id`,`user_name`,`user_pwd`,`create_time`,`update_time`,`status`) values (1,'宋书航','1','2020-11-23 09:30:16','2020-11-25 22:16:25',1),(2,'雨柔子','1','2020-11-23 11:25:41','2020-11-25 22:16:25',1),(4,'王五','1','2020-11-23 11:25:58','2020-11-25 22:16:26',0),(5,'赵柳','1','2020-11-23 11:26:12','2020-11-25 22:16:26',0),(8,'田七','1','2020-11-23 11:26:29','2020-11-25 22:16:27',0),(9,'田七','1','2020-11-23 15:03:23','2020-11-25 22:16:28',0),(10,'田七','1','2020-11-23 15:03:43','2020-11-25 22:16:28',0),(11,'戴沐白','1','2020-11-24 10:45:06','2020-11-25 22:16:29',1),(12,'张小凡','1','2020-11-24 10:45:29','2020-11-25 22:16:29',1),(13,'userName2','1','2020-11-24 10:45:29','2020-11-25 22:16:30',0),(14,'userName3','1','2020-11-24 10:45:29','2020-11-25 22:16:30',0),(15,'碧瑶','1','2020-11-24 10:45:29','2020-11-25 22:16:31',1),(16,'赵恋凡','1','2020-11-24 10:45:29','2020-11-25 22:16:31',1),(17,'李长寿','1','2020-11-24 10:45:29','2020-11-25 22:16:32',1),(18,'蓝梦娥','1','2020-11-24 10:45:29','2020-11-25 22:16:33',1),(19,'userName8','1','2020-11-24 10:45:29','2020-11-25 22:16:38',0),(20,'userName9','123456','2020-11-24 10:45:29','2020-11-25 11:36:31',0),(21,'userName10','123456','2020-11-24 10:45:29','2020-11-25 11:36:36',0),(22,'路明非','123456','2020-11-24 10:45:29','2020-11-25 17:44:31',1),(23,'楚子航','123456','2020-11-24 10:45:29','2020-11-25 22:14:26',1),(24,'userName13','123456','2020-11-24 10:45:29','2020-11-24 10:45:29',1),(25,'userName14','123456','2020-11-24 10:45:29','2020-11-24 10:45:29',1),(26,'userName15','123456','2020-11-24 10:45:29','2020-11-25 23:03:54',0),(27,'userName16','123456','2020-11-24 10:45:29','2020-11-25 23:03:54',0),(28,'userName17','123456','2020-11-24 10:45:29','2020-11-25 23:03:54',0),(29,'userName18','123456','2020-11-24 10:45:29','2020-11-25 23:03:54',0),(30,'userName19','123456','2020-11-24 10:45:29','2020-11-25 23:03:54',0),(31,'userName20','123456','2020-11-24 10:45:29','2020-11-25 23:03:54',0),(32,'userName21','123456','2020-11-24 10:45:29','2020-11-24 10:45:29',1),(33,'乔微尼','123456','2020-11-24 10:45:29','2020-11-25 23:05:48',1),(35,'userName24','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(36,'userName25','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(37,'userName26','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(38,'userName27','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(39,'userName28','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(40,'userName29','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(41,'userName30','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(42,'userName31','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(43,'userName32','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(44,'userName33','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(45,'userName34','123456','2020-11-24 10:45:30','2020-11-24 10:45:30',1),(46,'userName35','123456','2020-11-24 10:45:30','2020-11-24 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# eclipse导入Web项目代码报错解决方案 #

> [原文链接][Link 1]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 6][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 7][]   ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 8][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 9][]

# 新闻管理系统——项目展示 #

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 10][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 11][]

## “新闻管理”栏目 ##

> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 12][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 13][]
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 14][]

> 在周老师的指导、zyk同学的帮助下，完成的。啊哈哈、

[Bootstrap4_MySQL_10_ _]: https://blog.csdn.net/weixin_44949135/article/details/109722002
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 3]: /images/20221120/2f71982813e64034ad82cb0a5e8a5b71.png
[20201126000551119.png]: /images/20221120/65d8773617eb4bfa9af8ab6e6b76246c.png
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[Link 1]: https://blog.csdn.net/cms18374672699/article/details/83045754
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ_size_16_color_FFFFFF_t_70 7]: https://img-blog.csdnimg.cn/20201125174602295.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDk0OTEzNQ==,size_16,color_FFFFFF,t_70
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