Java圖片上傳
阿新 • • 發佈：2018-02-07
ack 連接 ati pat html out eclips ppi substring 最近閑來無事，就整理常用的功能，以下是項目中圖片上傳的功能，將圖片上傳到服務器tomcat下，數據庫中存放相對路徑，大家一起學習。
環境：eclipse jdk1.7 tomcat7 maven3.5
步驟：
@RequestMapping(params="upLoadPicture")
@ResponseBody
public String addFilemsgPic(MultipartFile file,HttpServletRequest request) throws Exception{
String path="../Manage_ssm/upLoadPicture";
//創建文件
File dir=new File(path);
if(!dir.exists()){
dir.mkdirs();
}
String username=(String) request.getSession().getAttribute("userName");
//返回原來在客戶端的文件系統的文件名
String fileName=file.getOriginalFilename();
//username+後綴名
String img=username+fileName.substring(fileName.lastIndexOf("."));//zhao.jpg
FileOutputStream imgOut=new FileOutputStream(new File(dir,img));//根據 dir 抽象路徑名和 img 路徑名字符串創建一個新 File 實例。
imgOut.write(file.getBytes());//返回一個字節數組文件的內容
imgOut.close();
Map<String, String> map=new HashMap<String, String>();
String rpath = path+"/"+img;
map.put("rPath",rpath);
JSONObject jsonObject = JSONObject.fromObject(map);//將json字符串轉換為json對象
String r=jsonObject.toString();
String s=URLEncoder.encode(r, "utf-8");//加密
return s;
}@RequestMapping(params="pictureToDb")
@ResponseBody
public int pictureToDb(String src,HttpServletRequest request){
String newSrc = src.replace(" ", "+");
int flag=ConnOrcl.connToTable(newSrc,request);
if(flag==1)
return 1;
else
return 2;
}public class ConnOrcl {
private static Connection conn;
private static Statement stat;
private static String driver = "oracle.jdbc.driver.OracleDriver";
private static int SUCCESS=1;
private static int FILE=2;
public static int connToTable(String file,HttpServletRequest request)
{
try
{
//數據庫連接
Class.forName(driver);
conn = java.sql.DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl", "GKBMFZXT", "GKBMFZXT");
stat = conn.createStatement();
String username=(String) request.getSession().getAttribute("userName");
String sql="update user_table set picture='"+file+"' where user_name='"+username+"'";
stat.execute(sql.toString());
return SUCCESS;
}
catch(ClassNotFoundException e)
{
e.printStackTrace();
}
catch(SQLException e)
{
e.printStackTrace();
}
finally
{
if(null != stat)
{
try
{
stat.close();
}
catch (SQLException e)
{
e.printStackTrace();
}
}
if(null != conn)
{
try
{
conn.close();
}
catch (SQLException e)
{
e.printStackTrace();
}
}
}
return FILE;
}
}<script src="js/ajaxfileupload.js"></script>
<script type="text/javascript">
function upload(){
var file="file";
var picElement=document.getElementById(file).value;
var picFormat=picElement.substring(picElement.lastIndexOf('.')+1,picElement.length);
if(picFormat!="jpg"){
alert("請選擇jpg 格式的文件!");
return;
}
$.ajaxFileUpload({
url:"user.do?upLoadPicture",
secureuri: false,
fileElementId:file,
dataType: 'JSON',
success:function(data){
data=decodeURIComponent(data);//解碼
var arr=JSON.parse(data);//JSON.parse() 方法解析一個JSON字符串
$("#fsrc").val(arr.rPath);
$.post(
"user.do?pictureToDb&src="+$("#fsrc").val(),
function(data){
//data=decodeURIComponent(data);
//var arr=JSON.parse(data);
if(data==1){
alert("上傳成功！");
}else{
alert("上傳失敗！");
}
}
);
},
error: function (){
alert("上傳失敗!當前時間為:"+new Date().toLocaleTimeString());
}
});
};
function findFile(){
document.getElementById("file").click();
}Java圖片上傳