2023-09-16
导入依赖
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.4</version>
</dependency>
设置文件上传解析器
springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.hh"></context:component-scan>
<!--设置前端控制器-->
<bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
<property name="order" value="1"></property>
<property name="characterEncoding" value="UTF-8"></property>
<property name="templateEngine">
<bean class="org.thymeleaf.spring5.SpringTemplateEngine">
<property name="templateResolver">
<bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
<!--视图前缀-->
<property name="prefix" value="/WEB-INF/templates/"></property>
<!--视图后缀-->
<property name="suffix" value=".html"></property>
<property name="templateMode" value="HTML5"></property>
<property name="characterEncoding" value="UTF-8"></property>
</bean>
</property>
</bean>
</property>
</bean>
<!--设置默认的servlet处理静态资源-->
<mvc:default-servlet-handler/>
<!--开启视图注解驱动器-->
<mvc:annotation-driven />
<mvc:view-controller path="/" view-name="index"></mvc:view-controller>
<!--配置文件上传的解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>
</beans>
index.html文件
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>首页</title>
</head>
<body>
<div id="app">
<h1>index.html</h1>
<input type="button" @click="testAjax()" value="测试ajax">
<input type="button" @click="testRequestBody()" value="测试requestBody">
<input type="button" @click="testRequestBodyJson()" value="测试requestBodyJson"><br>
<a th:href="@{/test/responseBody}">测试responseBody</a>
<a th:href="@{/test/down}">测试文件下载</a>
<form th:action="@{/test/up}" method="post" enctype="multipart/form-data">
头像：<input type="file" name="photo"><br>
<input type="submit" value="上传">
</form>
</div>
<script type="text/javascript" th:src="@{/js/vue.js}"></script>
<script type="text/javascript" th:src="@{/js/axios.min.js}"></script>
<script type="text/javascript">
new Vue({
el:"#app",
methods:{
testAjax(){
axios.post(
"/spring_mvc_ajax_war_exploded/test/ajax?id=1002",
{username:"root",password:"123456"}
).then(response=>{
console.log(response.data)
})
},
testRequestBody(){
axios.post(
"/spring_mvc_ajax_war_exploded/test/ajax/requestbody",
{id:1,name:"jack",age:18,gender:"男"}
).then(response=>{
console.log(response.data)
})
},
testRequestBodyJson(){
axios.post(
"/spring_mvc_ajax_war_exploded/test/responseBodyJson"
).then(response=>{
console.log(response.data)
})
}
}
})
</script>
</body>
</html>
FileUpAndDownController
package com.hh.controller;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import java.io.*;
import java.util.UUID;
/**
* @author hh
* @version 1.0
* @DATE 2023-09-16 9:25:49
*/
@Controller
public class FileUpAndDownController {
@RequestMapping("/test/up")
public String testUp(MultipartFile photo,HttpSession session) throws IOException {
//获取上传文件的文件名
String fileName = photo.getOriginalFilename();
//获取上传文件的后缀名
String hzName = fileName.substring(fileName.lastIndexOf("."));
//获取UUID
String uuid = UUID.randomUUID().toString();
//拼接一个新的文件名(为了防止上传同名的文件，导致文件内容被覆盖)
fileName = uuid +hzName;
//获取servletContext对象
ServletContext servletContext = session.getServletContext();
//获取photo的真实路径
String photoPath = servletContext.getRealPath("photo");
//创建photoPath所对应的File对象
File file = new File(photoPath);
//判断file所对应的目录是否存在
if(!file.exists()){
file.mkdir();
}
String finalPath = photoPath+File.separator+fileName;
//上传文件
photo.transferTo(new File(finalPath));
return "success";
}
@RequestMapping("/test/down")
public ResponseEntity<byte[]> testResponseEntity(HttpSession session) throws IOException {
//获取ServletContext对象
ServletContext servletContext = session.getServletContext();
//获取服务器中文件的真实路径
String realPath = servletContext.getRealPath("/img/1.jpg");
//创建输入流
InputStream is = new FileInputStream(realPath);
//创建字节数组
byte[] bytes = new byte[is.available()];
//将流读到字节数组中
is.read(bytes);
//创建HttpHeaders对象设置响应头信息
MultiValueMap<String,String> headers = new HttpHeaders();
//设置要下载方式以及下载文件的名字
headers.add("Content-Disposition","attachment;filename=1.jpg");
//设置响应码
HttpStatus statusCode = HttpStatus.OK;
//出啊关键ResponseEntity对象
ResponseEntity<byte[]> responseEntity = new ResponseEntity<>(bytes,headers,statusCode);
//关闭输入流
is.close();
return responseEntity;
}
}
标签：文件,String,springmvc,springframework,设置,new,import,上传 From： https://www.cnblogs.com/isDaHua/p/17706382.html