A brief discussion on using SSM+BootStrap to achieve the effect of adding, deleting, modifying, checking and avatar uploading

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

























    

        

            
学生编号
            
学生姓名
            
班级名称
            
头像
            
状态
            
操作
        
    
    

        

            

                

                    

                        ×
                        
学生信息修改
                    
                    

                        学生编号：
 学生姓名：

                        所在班级：
                         当前头像：
                        

                            
                        
                        用户头像：
                        

                            
                        

                        
                    
                    

                        提交更改
                        关闭
                    
                
                
            
            
        
    

package com.llh.controller;

import java.io.File;
import java.io.IOException;
import java.util.Date;
import java.util.List;
import java.util.Random;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.io.FileUtils;
import org.springframework.context.annotation.Scope;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.llh.entity.Student;
import com.llh.service.StudentService;

import net.sf.json.JSONArray;

@Controller
@Scope("prototype")
public class StudentController {

    @Resource
    private StudentService studentService;

    /**
     * 分页查询所有
     *
     * @param pageCode
     * @param pageSize
     * @return
     */
    @RequestMapping(value = "selectAll", produces = "text/html;charset=utf-8")
    public @ResponseBody String selectAll(int pageCode, int pageSize) {
        PageHelper.startPage(pageCode, pageSize);
        List slist = studentService.selectAll();
        PageInfo spi = new PageInfo(slist);
        int count = (int) spi.getTotal();
        JSONArray json = JSONArray.fromObject(slist);
        String str = "{\"total\":" + count + ",\"rows\":" + json.toString() + "}";
        return str;
    }

    /**
     * 上传
     *
     * @param request
     * @param file
     * @return
     * @throws IllegalStateException
     * @throws IOException
     */
    @RequestMapping(value = "upload")
    public @ResponseBody String upload(HttpServletRequest request, MultipartFile file)
            throws IllegalStateException, IOException {
        String name = file.getOriginalFilename();
        String path = request.getServletContext().getRealPath("/upload/");// 上传保存的路径
        String fileName = changeName(name);
        String rappendix = "upload/" + fileName;
        fileName = path + "\\" + fileName;
        File file1 = new File(fileName);
        file.transferTo(file1);
        String str = "{\"src\":\"" + rappendix + "\"}";
        return str;
    }

    public static String changeName(String oldName) {
        Random r = new Random();
        Date d = new Date();
        String newName = oldName.substring(oldName.indexOf('.'));
        newName = r.nextInt(99999999) + d.getTime() + newName;
        return newName;
    }

    /**
     * 编辑
     *
     * @param stuid
     * @param session
     * @return
     */
    @RequestMapping(value = "editBystuid", produces = "text/html;charset=utf-8")
    public @ResponseBody String editBystuid(Integer stuid) {
        System.out.println("编辑");
        Student s = studentService.selectByPrimaryKey(stuid);
        JSONArray json = JSONArray.fromObject(s);
        String js = json.toString();
        System.out.println(js);
        return js;
    }

    /**
     * 修改
     *
     * @param stuid
     * @param stuname
     * @return
     */
    @RequestMapping(value = "updateBystuid", produces = "text/html;charset=utf-8")
    public @ResponseBody String updateBystuid(@ModelAttribute Student s) {
        System.out.println("修改中");
        System.out.println(s.getStuname() + s.getStuid()+s.getUserimage());
        int a = studentService.updateByPrimaryKey(s);
        if (a != 0) {
            return "ok";
        }
        return "error";
    }

    /**
     * 下载
     *
     * @param stuid
     * @return
     * @throws IOException
     */
    @RequestMapping(value = "download", produces = "text/html;charset=utf-8")
    public ResponseEntity download(Integer stuid,HttpServletRequest request) throws IOException {
        Student s = studentService.selectByPrimaryKey(stuid);
        String path=request.getServletContext().getRealPath("\\");
        String downpath = path+s.getUserimage();
        File file1=new File(downpath);
        //String downloadFileName=new String(downpath.getBytes("UTF-8"),"iso-8859-1");
        HttpHeaders heads=new HttpHeaders();
        heads.setContentDispositionFormData("attachment", downpath);
        heads.setContentType(MediaType.APPLICATION_OCTET_STREAM);
        return new ResponseEntity(FileUtils.readFileToByteArray(file1), heads,HttpStatus.CREATED);
    }



}