服务器架构的问题-文件上传
package com.itheima.control;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.itheima.pojo.Resource;
import com.itheima.utils.JSONFileUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;
@Controller
public class FileController {
@RequestMapping("/fileUpLoad")
public String fileUpLoad(MultipartFile[] files,
HttpServletRequest request) throws Exception {
String path = request.getServletContext().getRealPath("/") + "files/";
ObjectMapper mapper = new ObjectMapper();
if (files != null && files.length > 0) {
for (MultipartFile file : files) {
String filename = files.getOriginalFilename();
ArrayList<Resource> list = new ArrayList<Resource>();
String json = JSONFileUtils.readFile(path + "/files.json");
if (json.length() != 0) {
list = mapper.readValue(json, new TypeReference<List<Resource>>() {
});
for (Resource resource : list) {
if (filename.equals(resource.getName())) {
String[] split = filename.split("\\.");
filename = split[0] + "(1)." + split[1];
}
}
}
String filePath = path + filename;
file.transferTo(new File(filename));
list.add(new Resource(filename));
json=mapper.writeValueAsString(list);
JSONFileUtils.writeFile(json,path+"/files.json");
}
request.setAttribute("msg","(上传成功)");
return "forward:fileload.jsp";
}
request.setAttribute("msg","(上传失败)");
return "forward:fileload.jsp";
}
@ResponseBody
@RequestMapping(value = "/getFilesName",produces = "text/html;charset=utf-8")
public String getFilesName(HttpServletRequest request, HttpServletResponse response)throws Exception{
String path=request.getServletContext().getRealPath("/")+"file/files.json";
String json=JSONFileUtils.readFile(path);
return json;
}
}
package com.itheima.utils;
import sun.misc.IOUtils;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class JSONFileUtils {
public static String readFile(String filepath) throws Exception{
FileInputStream fis=new FileInputStream(filepath);
return IOUtils.toString(fis);
}
public static void writeFile(String data,String filepath)throws Exception{
FileOutputStream fos=new FileOutputStream(filepath);
IOUtils.write(data,fos);
}
}
package com.itheima.pojo;
public class Resource {
private String name;
public Resource(String name){
this.name=name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
、
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>实验7：文件上传和下载</title>
<script src="${pageContext.request.contextPath}/js/jquery-3.6.0.js"
type="text/javascript"></script>
</head>
<body>
<table border="1">
<tr>
<td width="200" align="center">文件上传${msg}</td>
<td width="300" align="center">下载列表</td>
</tr>
<tr>
<td height="100">
<form action="${pageContext.request.contextPath}/fileUpLoad"
method="post" enctype="multipart/form-data">
<input type="file" name="files" multiple="multiple"><br/>
<input type="reset" value="清空"/>
<input type="submit" value="提交"/>
</form>
</td>
<td id="files"></td>
</tr>
</table>
</body>
<script>
$(document).ready(function (){
var url="${pageContext.request.contextPath}/getFilesName";
$.get(url,function (files){
var files=eval('('+files+')');
for (var i=0;i<files.length;i++){
$("#files").append("<li><a href=${pageContext.request.contextPath}"+
"\\"+"download?filename="+files[i].name+">"+files[i].name+"</a></li>");
}
})
})
</script>
</html>
<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 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>untitled1</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>untitled1 Maven Webapp</name>
<url>http://maven.apache.org</url> <dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.10.RELEASE</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.4</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.1.1</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.1</version>
<configuration>
<port>8083</port>
<path>/</path>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>4.0.0</version>
<configuration>
<source>7</source>
<target>7</target>
</configuration>
</plugin>
</plugins>
</build></projec
这几个爆红的函数不是应该存在吗，有人能解答一下吗，
第一张图，
检查下你的代码，你应该是String filename = file.getOriginalFilename(),而不是String filename = files.getOriginalFilename();
第二张图，
检查下你的包是不是引错了，应该是org.apache.commons.io.IOUtils，而不是sun.misc.IOUtils
第三张图，
应该不影响运行，先不管他