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travels

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SpringBoot + Vue 搭建的旅游项目

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# 项目简介
**所需技术栈**：
* 后端技术栈：**springboot** + **mybatis**
* 前后端分离：axios、json
* 前端技术栈、技术架构：Vue、node.js

**前置知识**：
* 了解 Vue 组件之前的知识
* 对 springboot + mybatis 较熟悉

开发流程：
* 需求分析	
* 库表设计	
* 编码（项目环境搭建+编码）	
* 项目调试	
* 项目部署上线

**需求分析**：
* 用户模块：登录 + 注册
* 省份模块：一个省份可能存在多个景点
* 景点模块：一个景点对应多个省份

## 项目演示
进入系统需登录：
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626223232435.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
用户注册页面：
![在这里插入图片描述](https://img-blog.csdnimg.cn/2020062622343822.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
省份列表页面：
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626223254725.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
添加省份页面：
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626223631355.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
修改省份页面：
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626223309698.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
景点列表页面：
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626223346854.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
添加景点页面：
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626223556642.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
修改景点页面：
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626223359938.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzczNDA5NQ==,size_16,color_FFFFFF,t_70)
## 数据库建表
用户表	`t_user` —— 独立的表
* id、username、password、email

省份表	`t_province`	[省份表 : 景点表] —— [1 : N]
* id、name、tags、placecounts

景点表	`t_place`
* id、name、picpath、hottime、hotticket、dimticket、placedes、provinceid(外键)

---

数据库名：`travels`

用户表 SQL：
```sql
CREATE TABLE t_user(
	id INT(6) PRIMARY KEY AUTO_INCREMENT,
	username VARCHAR(60),
	password VARCHAR(60),
	email VARCHAR(60)
);
```
省份表 SQL：
```sql
CREATE TABLE t_province(
	id INT(6) PRIMARY KEY AUTO_INCREMENT,
	name VARCHAR(60),
	tags VARCHAR(80),
	placecounts INT(4)
);
```
景点表 SQL：
```sql
CREATE TABLE t_place(
	id INT(6) PRIMARY KEY AUTO_INCREMENT,
	name VARCHAR(60),
	picpath MEDIUMTEXT,
	hottime	TIMESTAMP,
	hotticket	DOUBLE(7,2),
	dimticket	DOUBLE(7,2),
	placedes	VARCHAR(300),
	provinceid	INT(6) REFERENCES t_province(id)
);
```

# 环境搭建
利用 **Spring Initializr** 快速搭建 SpringBoot 项目。

## 引入依赖（pom.xml）
```xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.1.RELEASE</version>
		<relativePath/> 
	</parent>

<groupId>com.yusael</groupId>
	<artifactId>mytravels</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>mytravels</name>
	<description>springboot + vue</description>

<dependencies>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.1.2</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
			<optional>true</optional>
		</dependency>
		
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.1.12</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
		</dependency>
		
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.4</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
	</dependencies>

<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>
```

## 配置文件（application.properties）
application.properties：
```properties
server.port=8989
spring.application.name=travels

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/travels?characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=1234

mybatis.mapper-locations=classpath:com/yusael/travels/mapper/*.xml
mybatis.type-aliases-package=com.yusael.travels.entity

logging.level.root=info
logging.level.com.yusael.travels.dao=debug

# 上传的图片存放的路径
upload.dir=D:/CodePro/IdeaPro/SpringBoot/travels/images
spring.resources.static-locations=file:${upload.dir}
```

# href="javascript:;" 含义
代码中经常遇到这种写法：
```html
<a href="javascript:;" @click="deleteProvince(province.id)">删除省份</a>
```
其中的 `href="javascript:;"` 是什么意思呢？
* `javascript:` 表示在触发默认动作时，执行一段 JavaScript 代码；
* `javascript:;` 表示什么都不执行，这样点击时就没有任何反应，相当于去掉 a 标签的默认行为。

# select - option 绑定 Vue 实例
`select` 中 通过 `v-model` 绑定当前的选项，`option` 中使用 `v-for` 遍历显示所有选项。
```html
<label>
     <div class="label-text">所属省份：</div>
     <select v-model="place.provinceid">
         <option v-for="(pro,index) in provinces" :value="pro.id" v-text="pro.name"></option>
     </select>
 </label>
```

# 删除时增加确认选项
```js
if (confirm("确定要删除景点吗?")) {
	// code....
}
```
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200626210046689.png)
# Vue 获取地址栏跳转的参数
对于这么一个 a 标签，我们要在另一个页面获取这个 url 的参数 id：
```html
<a :href="'./updateprovince.html?id=' + province.id">修改省份</a>
```
可以通过 `location.href` 获取 url 再进行截取：
```js
var id = location.href.substring(location.href.indexOf("=") + 1);
```

# 前后端分离项目—验证码功能
验证码工具类：
```java
package com.yusael.travels.utils;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;

import javax.imageio.ImageIO;

public class CreateImageCode {
    // 图片的宽度。
    private int width = 160;
    // 图片的高度。
    private int height = 40;
    // 验证码字符个数
    private int codeCount = 4;
    // 验证码干扰线数
    private int lineCount = 20;
    // 验证码
    private String code = null;
    // 验证码图片Buffer
    private BufferedImage buffImg = null;
    Random random = new Random();

public CreateImageCode() {
        creatImage();
    }

public CreateImageCode(int width, int height) {
        this.width = width;
        this.height = height;
        creatImage();
    }

public CreateImageCode(int width, int height, int codeCount) {
        this.width = width;
        this.height = height;
        this.codeCount = codeCount;
        creatImage();
    }

public CreateImageCode(int width, int height, int codeCount, int lineCount) {
        this.width = width;
        this.height = height;
        this.codeCount = codeCount;
        this.lineCount = lineCount;
        creatImage();
    }

// 生成图片
    private void creatImage() {
        int fontWidth = width / codeCount;// 字体的宽度
        int fontHeight = height - 5;// 字体的高度
        int codeY = height - 8;

// 图像buffer
        buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics g = buffImg.getGraphics();
        //Graphics2D g = buffImg.createGraphics();
        // 设置背景色
        g.setColor(getRandColor(200, 250));
        g.fillRect(0, 0, width, height);

// 设置字体
        //Font font1 = getFont(fontHeight);
        Font font = new Font("Fixedsys", Font.BOLD, fontHeight);
        g.setFont(font);

// 设置干扰线
        for (int i = 0; i < lineCount; i++) {
            int xs = random.nextInt(width);
            int ys = random.nextInt(height);
            int xe = xs + random.nextInt(width);
            int ye = ys + random.nextInt(height);
            g.setColor(getRandColor(1, 255));
            g.drawLine(xs, ys, xe, ye);
        }

// 添加噪点
        float yawpRate = 0.01f;// 噪声率
        int area = (int) (yawpRate * width * height);
        for (int i = 0; i < area; i++) {
            int x = random.nextInt(width);
            int y = random.nextInt(height);

buffImg.setRGB(x, y, random.nextInt(255));
        }

String str1 = randomStr(codeCount);// 得到随机字符
        this.code = str1;
        for (int i = 0; i < codeCount; i++) {
            String strRand = str1.substring(i, i + 1);
            g.setColor(getRandColor(1, 255));
            // g.drawString(a,x,y);
            // a为要画出来的东西，x和y表示要画的东西最左侧字符的基线位于此图形上下文坐标系的 (x, y) 位置处

g.drawString(strRand, i*fontWidth+3, codeY);
        }

}

// 得到随机字符
    private String randomStr(int n) {
        String str1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
        String str2 = "";
        int len = str1.length() - 1;
        double r;
        for (int i = 0; i < n; i++) {
            r = (Math.random()) * len;
            str2 = str2 + str1.charAt((int) r);
        }
        return str2;
    }

// 得到随机颜色
    private Color getRandColor(int fc, int bc) {// 给定范围获得随机颜色
        if (fc > 255)
            fc = 255;
        if (bc > 255)
            bc = 255;
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }

/**
     * 产生随机字体
     */
    private Font getFont(int size) {
        Random random = new Random();
        Font font[] = new Font[5];
        font[0] = new Font("Ravie", Font.PLAIN, size);
        font[1] = new Font("Antique Olive Compact", Font.PLAIN, size);
        font[2] = new Font("Fixedsys", Font.PLAIN, size);
        font[3] = new Font("Wide Latin", Font.PLAIN, size);
        font[4] = new Font("Gill Sans Ultra Bold", Font.PLAIN, size);
        return font[random.nextInt(5)];
    }

// 扭曲方法
    private void shear(Graphics g, int w1, int h1, Color color) {
        shearX(g, w1, h1, color);
        shearY(g, w1, h1, color);
    }

private void shearX(Graphics g, int w1, int h1, Color color) {

int period = random.nextInt(2);

boolean borderGap = true;
        int frames = 1;
        int phase = random.nextInt(2);

for (int i = 0; i < h1; i++) {
            double d = (double) (period >> 1)
                    * Math.sin((double) i / (double) period
                    + (6.2831853071795862D * (double) phase)
                    / (double) frames);
            g.copyArea(0, i, w1, 1, (int) d, 0);
            if (borderGap) {
                g.setColor(color);
                g.drawLine((int) d, i, 0, i);
                g.drawLine((int) d + w1, i, w1, i);
            }
        }

}

private void shearY(Graphics g, int w1, int h1, Color color) {

int period = random.nextInt(40) + 10; // 50;

boolean borderGap = true;
        int frames = 20;
        int phase = 7;
        for (int i = 0; i < w1; i++) {
            double d = (double) (period >> 1)
                    * Math.sin((double) i / (double) period
                    + (6.2831853071795862D * (double) phase)
                    / (double) frames);
            g.copyArea(i, 0, 1, h1, 0, (int) d);
            if (borderGap) {
                g.setColor(color);
                g.drawLine(i, (int) d, i, 0);
                g.drawLine(i, (int) d + h1, i, h1);
            }

}

public void write(OutputStream sos) throws IOException {
        ImageIO.write(buffImg, "png", sos);
        sos.close();
    }

public BufferedImage getBuffImg() {
        return buffImg;
    }

public String getCode() {
        return code.toLowerCase();
    }

//使用方法
 /*public void getCode3(HttpServletRequest req, HttpServletResponse response,HttpSession session) throws IOException{
        // 设置响应的类型格式为图片格式
            response.setContentType("image/jpeg");
            //禁止图像缓存。
            response.setHeader("Pragma", "no-cache");
            response.setHeader("Cache-Control", "no-cache");
            response.setDateHeader("Expires", 0);

CreateImageCode vCode = new CreateImageCode(100,30,5,10);
            session.setAttribute("code", vCode.getCode());
            vCode.write(response.getOutputStream());
     }*/

}
```

后台控制器：需要对生成的验证码图片进行 Base64 编码后传到前端页面，前端再解析展示图片。
```java
@RestController
@RequestMapping("/user")
@CrossOrigin // 允许跨域(前后端分离)
@Slf4j // 日志对象
public class UserController {
    /**
     * 生成验证码
     * @throws IOException
     */
    @GetMapping("/getImage")
    public Map<String, String> getImage(HttpServletRequest request) throws IOException {
        Map<String, String> result = new HashMap<>();
        CreateImageCode createImageCode = new CreateImageCode();
        // 获取验证码
        String securityCode = createImageCode.getCode();
        // 验证码存入session
        String key = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
        request.getServletContext().setAttribute(key, securityCode);
        // 生成图片
        BufferedImage image = createImageCode.getBuffImg();
        //进行base64编码
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ImageIO.write(image, "png", bos);
        String string = Base64Utils.encodeToString(bos.toByteArray());
        result.put("key", key);
        result.put("image", string);
        return result;
    }
}
```
前端页面：
```html

<img :src="src" id="img-vcode" @click="getImage" :key="key">
<label>
    <div class="label-text">验证码：</div>
    <input type="text" name="vcode" style="width: 100px">
</label>
```
```js
<script>
    const app = new Vue({
        el: "#app",
        data: {
            src: "",
            key: ""
        },
        methods: {
            getImage() {
                _this = this;
                axios.get("http://localhost:8989/user/getImage").then((res) => {
                    console.log(res.data);
                    _this.src = "data:image/png;base64," + res.data.image;
                    _this.key = res.data.key;
                })
            }
        },
        created() {
            this.getImage(); // 获取验证码
        }
    });
</script>
```
# 前后端分离项目—分页功能
mysql 的 `LIMIT` 分页语句：
* `LIMIT n`: 取前 n 个数据，相当于 `LIMIT 0, n`；
* `LIMIT 2, 4`:  从第 ==3== 行开始检索 4 条数据；

---

**分页查询的SQL语句**：参数1是开始查询的数据行，参数2是查询数据条数。
```xml

<select id="findByPage" resultType="Province">
    SELECT * FROM t_province
    ORDER BY placecounts
    LIMIT #{start}, #{rows}
</select>
```

后台**业务层**代码：
传入的参数是当前所在页数，以及页面显示数量，无法直接应用 MySQL 的 `limit` 查询子句中，需要转换一下：`start = (page - 1) * rows` 计算出 `limit` 字句的第一个参数。
```java
@Override
public List<Province> findByPage(Integer page, Integer rows) {
    // 传入的是当前页数, 以及页面显示的数量
    // 所以要根据这两个参数计算从mysql中查询数据要从第几行开始查几条
    int start = (page - 1) * rows; // 计算要查询的数据是从第几条数据开始的
    return provinceDAO.findByPage(start, rows);
}
```

后台**控制器**代码：
```java
/**
 * 分页查询数据
 */
@GetMapping("/findByPage")
public Map<String, Object> findByPage(Integer page, Integer rows) {
    page = page==null ? 1 : page;
    rows = rows==null ? 4 : rows;
    System.out.println(page + " : " + rows);
    HashMap<String, Object> map = new HashMap<>();

// 分页查询出当前页面显示的数据
    List<Province> provinces = provinceService.findByPage(page, rows);

// 查询总数据条数, 用于计算总页数
    Integer totals = provinceService.findTotals();
    // 计算总页数
    // 如果总数据条数可以整除每一页数据个数, 说明结果正好为总页数
    // 如果总数据条数无法整除每一页数据个数, 说明总页数需要结果 + 1
    Integer totalPage = totals % rows == 0 ? totals / rows : totals / rows + 1;

map.put("provinces", provinces);
    map.put("totals", totals);
    map.put("totalPage", totalPage);
    map.put("page", page);

map.forEach((k, v) -> {
        System.out.println(k + ": " + v);
    });
    return map;
}
```

前端页面:
```html
<div id="pages">
	
    <a href="javascript:;" class="page" v-if="page > 1" @click="findAll(page - 1)">&lt;上一页</a>
    
    <a href="javascript:;" class="page" v-for="index in totalPage" @click="findAll(index)" v-text="index"></a>
	
    <a href="javascript:;" class="page" v-if="page < totalPage" @click="findAll(page + 1)">下一页&gt;</a>
</div>
```
超链接的写法可以更优化一下：优化后点击当前所在页数无效（不会发送任何请求）。
```html
<div id="pages">
    <a href="javascript:;" class="page" v-if="page > 1" @click="findAllPage(page - 1)">&lt;上一页</a>
    <span v-for="index in totalPage">
        <a href="javascript:;" class="page" v-if="page == index" v-text="index"></a>
        <a href="javascript:;" class="page" v-if="page != index" @click="findAllPage(index)" v-text="index"></a>
    </span>
    <a href="javascript:;" class="page" v-if="page < totalPage" @click="findAllPage(page + 1)">下一页&gt;</a>
</div>
```

```html
<script>
    const app = new Vue({
       el: "#app",
       data: {
           provinces : [],
           page : 1,
           rows : 4,
           totalPage : 0,
           totals : 0,
       },
        methods: {
            findAll(indexpage) { // 查询某一页的数据
                if (indexpage) {
                    this.page = indexpage;
                }
                _this = this; // 保存当前对象, 用于下面的作用域
                axios.get("http://localhost:8989/province/findByPage?page=" + this.page + "&rows=" + this.rows).then((res) => {
                    _this.provinces = res.data.provinces;
                    _this.page = res.data.page;
                    _this.totalPage = res.data.totalPage;
                    _this.totals = res.data.totals;
                });
            },
        },
        created() {
           this.findAll();
        }
    });
</script>
```

# 前后端分离项目—日期数据类型的处理
前后端数据交互采用的是 Json 的话，只需要在实体类中的属性加一个注解即可：
```java
@Data
@AllArgsConstructor
@NoArgsConstructor
@Accessors(chain = true)
@ToString
public class Place {
    private String id;
    private String name;
    private String picpath;
    
    @JsonFormat(pattern = "yyyy-MM-dd")
    private Date hottime; // 前后端分离项目对日期数据类型的处理
    
    private Double hotticket;
    private Double dimticket;
    private String placedes;
    private String provinceid;
}
```
# 前后端分离项目—文件上传
注：由于我们往数据库中插入的是文件的 Base64 编码，因此需要将 数据库中 `picpath` 字段的大小设置的足够大，可以使用以下几个数据类型：
| 数据类型 | 最大长度  |  近似值 |
|--|--| -- |
|TINYTEXT| 256 bytes	 |  |
| TEXT |  65,535 bytes | ~64kb |
|  MEDIUMTEXT  |   16,777,215 bytes |  ~16MB  |
|  LONGTEXT | 4,294,967,295 bytes	 |  ~4GB  |

在配置文件 `application.properties` 中配置文件上传的路径：
```properties
spring.resources.static-locations=file:${upload.dir}
upload.dir=D:/CodePro/IdeaPro/SpringBoot/travels/images
```
在后台控制器中 **注入路径**，并实现文件上传（用 Base64 编码进行处理）：
```java
@RestController
@RequestMapping("/place")
@CrossOrigin
public class PlaceController {
    @Autowired
    private PlaceService placeService;
    @Value("${upload.dir}") // 注入
    private String realPath;
    /**
     * 保存景点信息
     * @param pic
     * @return
     */
    @PostMapping("save")
    public Result save(MultipartFile pic, Place place) throws IOException {
        Result result = new Result();
        try {
            // 文件上传
            String extension = FilenameUtils.getExtension(pic.getOriginalFilename());
            String newFileName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + extension;
            // base64编码处理(注意, 这一步必须放在 transferTo 操作前面!)
            place.setPicpath(Base64Utils.encodeToString(pic.getBytes()));
            // 文件上传
            File file = new File(realPath);
            pic.transferTo(new File(file,newFileName));
            // 保存place对象
            placeService.save(place);
            result.setMsg("保存景点信息成功!!!");
        } catch (Exception e) {
            e.printStackTrace();
            result.setState(false).setMsg(e.getMessage());
        }
        return result;
    }
}
```
前端中上传文件：给标签添加属性 `ref="myFile"`
```html
<div class="label-text">印象图片：</div>
<div style="text-align: center;padding-left: 36%">
    <div id="upload-tip">+</div>
    <img src="" alt="" id="img-show" style="display: none">
    <input type="file" id="imgfile" ref="myFile" style="display: none" onchange="imgfileChange()">
</div>
```
```html
<script>
    const app = new Vue({
        el: "#app",
        data: {
            provinces: [],
            place: {},
            id: "",
        },
        methods: {
            savePlaceInfo() { // 保存景点的方法
                console.log(this.place); // 获取到了place对象
                let myFile = this.$refs.myFile;
                let files = myFile.files;
                let file = files[0];
                let formData = new FormData();
                formData.append("pic", file);
                formData.append("name", this.place.name);
                formData.append("hottime", this.place.hottime);
                formData.append("hotticket", this.place.hotticket);
                formData.append("dimticket", this.place.dimticket);
                formData.append("placedes", this.place.placedes);
                formData.append("provinceid", this.place.provinceid);
                //axios
                axios({
                    method: 'post',
                    url: 'http://localhost:8989/place/save',
                    data: formData,
                    headers: {
                        'Content-Type': 'multipart/form-data'
                    }
                }).then((res) => {
                    console.log(res.data);
                    if (res.data.state) {
                        alert(res.data.msg + ",点击确定回到景点列表");
                        location.href = "./viewspotlist.html?id=" + this.place.provinceid;
                    } else {
                        alert(res.data.msg + ",点击确定回到景点列表");
                    }
                });
            }
        },
    });
</script>
```
前端中展示 base64 格式的文件：
```html
<img :src="'data:image/png;base64,' + place.picpath" class="viewspotimg">
```

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