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【1】视图层
action="${ctx}/web/UserInforServlet?method=userInforServlet" >
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var layer,upload,form;
//1-页面数据加载
$(function () {
//【1】加载&初始化layui模块-弹出层与table数据表格
layui.use(["layer", "upload","form"], function () {
layer = layui.layer;
laydate=layui.laydate;
upload = layui.upload;//layui的上传
form= layui.form;
uploadImage();
});
});
function uploadImage(){
var $ = layui.jquery;
upload.render({
elem: "#upImage"
,auto: false
,size:1024
,choose: function(obj){//使用choose选择文件后的回调函数
//预读本地文件示例，不支持ie8
obj.preview(function(index, file, result){
$("#userImge").attr("src",result); //图片链接(base64)
});
}
});
}
//提交form表单
$("#saveUserInfor").click(function(){
$("#frregister").ajaxSubmit(function(data) {
if(data="1"){
layer.msg("成功！");
}
});
});
【2】控制器
publicvoid userInforServlet(HttpServletRequest request,HttpServletResponseresponse) throws IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=UTF-8");//处理响应编码
Map map=new HashMap();
UserDetail userDetail=new UserDetail();
try {
//【1】解析数据
DiskFileItemFactory fac=new DiskFileItemFactory();
int sizeThreshold=1024*1024*10; //10MB
fac.setSizeThreshold(sizeThreshold);
fac.setRepository(new File(System.getProperty("java.io.tmpdir")));
ServletFileUpload upload=new ServletFileUpload(fac);//文件上传解析器
upload.setHeaderEncoding("utf-8");
Listlist=upload.parseRequest(request);
//【2】遍历集合
for(FileItem item :list){
//1)如果当前FileItem对象是普通项
if(item.isFormField()){
map.put(item.getFieldName(),item.getString());
}else{
//1)如果当前FileItem对象是上传项
//2)判断是否存在有该文件夹
String realPath=("D:/Mytouimage");
File uploadMkdir=new File(realPath);
if(!uploadMkdir.exists()){
uploadMkdir.mkdir();
}
//如果fileitem中封装的是上传文件，得到上传的文件名称，
String fileName = item.getName();//上传文件的名
//多个文件上传时，没有上传内容的问题异常处理
if(fileName==null||"".equals(fileName.trim())){ continue;
}
fileName =fileName.substring(fileName.lastIndexOf("\\")+1);
InputStream is=item.getInputStream();
File file=new File(realPath+"/"+fileName);
//3)先在本地存储图片，再读取保存到数据库
if(!file.isDirectory()){
userDetail.setImageName(realPath+"/"+item.getName());
OutputStream os=new FileOutputStream(file);
//IOUtils拷贝流
IOUtils.copy(is,os);
//关闭资源
IOUtils.closeQuietly(is);
IOUtils.closeQuietly(os);
item.delete();//删除处理文件上传时生成的临时文件
}
}
}
BeanUtils.populate(userDetail,map);
int flag =ids.insert(userDetail);
if(flag==1){
response.getWriter().write("1");
response.getWriter().close();
}
}
【3】dao层
@Override
publicint insert(UserDetail t) {
int flag=0;
InputStream fis=null;
String insert="INSERT INTOr_userdetail(userImage,imageName)" +
"VALUES(?,?);";
try {
con=JDBCUtil.getConnection();
ps=con.prepareStatement(insert);
if(t.getImageName()!=null){
//读取本地图片
fis=new FileInputStream(t.getImageName());
}
//将流写入Mysql
ps.setBinaryStream(1, fis, fis.available());
ps.setString(2, t.getImageName());
flag=ps.executeUpdate();
} catch (SQLException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
catch (FileNotFoundException e){
//TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
return flag;
}
【4】po层
publicclass UserDetail implements Serializable{
publicstaticfinallongserialVersionUID = 42L;
privateintuserDetailID;
private Blob userImage;
private String imageName;
public Blob getUserImage() {
returnuserImage;
}
publicvoid setUserImage(Blob userImage) {
this.userImage = userImage;
}
public String getImageName() {
returnimageName;
}
publicvoid setImageName(String imageName) {
this.imageName = imageName;
}
}
【5】总结
1)注意上传图片是form表单一定要加method="post" enctype="multipart/form-data" ，否则无法将数据上传到服务器。
2)Mysql存储图片的数据类型
TinyBlob最大 255
Blob 最大 65K
MediumBlob 最大 16M
LongBlob 最大 4G
3)在dao层向数据库添加数据
使用ps.setBinaryStream(1,fis, fis.available());
【6】显示图片
publicvoid selectUserImage(HttpServletRequest request, HttpServletResponseresponse) {
String id=request.getParameter("userID");
if(id!=null){
int userID=Integer.parseInt(id);
UserDetail userDetail=ids.findByUserid(userID);
BufferedOutputStream bufos=null;
BufferedInputStream bufis=null;;
try {
if(userDetail.getUserImage()!=null){
//读取缓冲区 userDetail.getUserImage().getBinaryStream()--读取源
bufis=new BufferedInputStream(userDetail.getUserImage().getBinaryStream());
//输出缓冲区 response.getOutputStream()--输出目的
bufos = new BufferedOutputStream(response.getOutputStream());
byte[] bt=newbyte[1024];
//【6】初始化实际长度的数组的长度
int count=0;
//【7】循环读取多媒体文件数据，将其读取的数据存储在byte数组
while((count=bufis.read(bt))!=-1){
//【8】截取数组从零到实际长度，循环写入多媒体的目标文件
bufos.write(bt,0,count);
}
}
bufis.close();
bufos.close();
} catch (SQLException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Java常用类-统计数字次数)
