spirngboot day4-文件上传

一.直接访问静态页面

1.如果不经过controller，service，dao层的，直接访问页面，可以在resouces下面新建一个static文件，放入需要访问的静态资源，

启动服务，访问页面：

spirngboot day4-文件上传

二.直接访问静态页面

使用springboot进行上传：

1.页面：index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
nihaoa!!!!!!
<form enctype="multipart/form-data" method="post" action="/uploadFiles">
    文件:<input type="file" name="imageUrl"/>
    姓名:<input type="text" name="name"/>
    <input type="submit" value="上传"/>
</form>
</body>
</html>

2.启动类：

package com.ljf.springboot.helloworld;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.MultipartConfigFactory;
import org.springframework.context.annotation.Bean;

import javax.servlet.MultipartConfigElement;

/**
 * Hello world!
 *
 */
@SpringBootApplication
public class App 
{
    public static void main( String[] args )
    {
        SpringApplication.run(App.class);
        System.out.println( "Hello World!" );
    }
    //设置上传图片大小的约束
    @Bean
    public MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        //单个文件最大
        factory.setMaxFileSize("10240KB"); //KB,MB
        /// 设置总上传数据总大小
        factory.setMaxRequestSize("1024000KB");
        return factory.createMultipartConfig();
    }
}

3.filecontroller：

package com.ljf.springboot.helloworld.controller;

import com.ljf.springboot.helloworld.utils.JsonData;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.UUID;

@Controller
public class FileController {
    private static final String filePath = "d:/";


    @RequestMapping(value = "/uploadFiles")
    @ResponseBody
    public JsonData upload(@RequestParam("imageUrl") MultipartFile file, HttpServletRequest request) {

        //file.isEmpty(); 判断图片是否为空
        //file.getSize(); 图片大小进行判断

        String name = request.getParameter("name");
        System.out.println("用户名："+name);

        // 获取文件名
        String fileName = file.getOriginalFilename();
        System.out.println("上传的文件名为：" + fileName);

        // 获取文件的后缀名,比如图片的jpeg,png
        String suffixName = fileName.substring(fileName.lastIndexOf("."));
        System.out.println("上传的后缀名为：" + suffixName);

        // 文件上传后的路径
        fileName = UUID.randomUUID() + suffixName;
        System.out.println("转换后的名称:"+fileName);

        File dest = new File(filePath + fileName);

        try {
            file.transferTo(dest);

            return new JsonData(0, fileName);
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return  new JsonData(-1, "fail to save ", null);
    }

}

4.如果需要打jar包，可以把存储图片的路径配置在配置文件中

application.yml:

image.upload-path=/Users/jack/Desktop
spring.resources.static-locations=classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/,classpath:/test/,file:${image.upload-path}

5.启动服务，上传图片

spirngboot day4-文件上传