spring boot上傳檔案

1、pom.xml依賴添加
<!-- 導入excel  -->
<dependency>  
            <groupId>org.apache.poi</groupId>  
            <artifactId>poi</artifactId>  
            <version>3.8</version>  
        </dependency>  
        <dependency>  
      	<groupId>commons-fileupload</groupId>  
      	<artifactId>commons-fileupload</artifactId>  
      	<version>1.3.1 </version>  
</dependency>  
<dependency>  
      	<groupId>commons-io</groupId>  
      	<artifactId>commons-io</artifactId>  
      	<version>2.4</version>  
</dependency> 
        <dependency>
    	<groupId>org.apache.poi</groupId>
    	<artifactId>poi-ooxml</artifactId>
    	<version>3.8</version>
</dependency>
        <dependency>
    	<groupId>net.sourceforge.jexcelapi</groupId>
    	<artifactId>jxl</artifactId>
    	<version>2.6.12</version>
</dependency>
2、設定application.properties
上傳的檔案大小
# Single file max size
spring.http.multipart.max-file-size=100Mb
# All files max size
spring.http.multipart.max-request-size=100Mb

3、html
<form id="uploadForm" >
<table>
<tr>
    <td>
 		<input class="btn btn-default" type="file" name="img" multiple="multiple"></input>
    </td>
    <td>
		<input class="btn btn-default" type="button" value="上傳" onclick="doUpload()">
		<input type="text" id="fileNameList" style="display:none;"></input>
		<input type="hidden" name="test"></input><!--在ie11中必須要添加次行-->
     </td>
    </tr>
   </table>
< /form>
4、js
//上傳檔案
function doUpload(){
    var formData = new FormData($("#uploadForm")[0]);
    $.ajax({  
        url : "/uploadFileTest",  
        type: 'POST',  
        data: formData,  
        async: false,  
        cache: false,  
        contentType: false,  
        processData: false, 
        success : function(result) {  
        	if(result==""||result==null){
        	alert("請至少選擇一個檔案~~");
        	}else{
        	var filepathSplit = result.split("ψ");
            	$("ul li").remove();
            	for(var f=0;f<filepathSplit.length;f++){
    	$("#filepath").append("<li style='line-height:170%;'><a style='cursor:pointer;' onclick='officeDemand(\""+filepathSplit[f]+"\")'>"+filepathSplit[f]+"</a></li>");
    	}
            	//添加檔案删除按鈕
    	if(filepathSplit.length>0){
    	$("#filepath").append("<li>< /li><li><a style='cursor:pointer;' onclick='delFile()'>删除</a></li>");
    	}
    	$("#filepath").show();
                $("#fileNameList").val(result);
                alert("上傳成功~~");
        	}  
        },  
        error : function(data) {  
            alert("上傳失敗~~");
        }
    }); 
}
5、java背景
//上傳excel,傳回檔案名稱
@RequestMapping("uploadFileTest")
@ResponseBody
public synchronized String uploadFileTest(@RequestParam("img") MultipartFile[] files,HttpServletRequest request){
MultipartFile file;
String fileName = "";
String userid = request.getUserPrincipal().getName();
if(files[0].getOriginalFilename()==null||files[0].getOriginalFilename().length()<=0){
return "";
}else{
for (int i = 0; i < files.length; i++){
String path = "d:/uploadFile";//本地路徑(伺服器路徑)
file = files[i];
fileName = fileName+userid+file.getOriginalFilename()+"ψ";
path = path +"/"+userid+file.getOriginalFilename();
try {
upload(path,file);
} catch (IOException e) {
e.printStackTrace();
}
}	
return fileName.substring(0, fileName.length()-1);
}	
}
    //上傳檔案
    public synchronized void upload(String filename,MultipartFile file) throws IOException{
    	File outFile = new File(filename);
    	BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(outFile)); // 建立檔案輸出流
    	//根據上傳的檔案，建立緩沖區，生成字元流，存入緩沖區
        byte[] buffer = file.getBytes();//建立檔案流       
        //把緩沖區的字元流 寫入 字元流目的地(把輸入流寫入輸出流)        
        stream.write(buffer);
        //第6步：重新整理流，關閉流
        stream.close();
    }