Development language: Java
Java development tool: JDK1.8
Back-end framework: SSM
Front-end: developed using JSP technology
Database: MySQL5.7 combined with Navicat management tools
Server: Tomcat8.5
Development software: IDEA/Eclipse
Whether it is a Maven project: Yes
Table of contents
1. Project Introduction
2. System functions
3. System project screenshots
3.1APP side
3.2Backend management
4. Core code
4.1 Login related
4.2 File upload
4.3 Packaging
1. Project Introduction
The widespread application of the Internet has brought great convenience to life. Therefore, the campus postgraduate entrance examination forum management is combined with the current network, and Java technology is used to build the campus postgraduate entrance examination forum based on Android to realize the informatization of the campus postgraduate entrance examination forum. This can play a significant role in further improving the management development of the campus postgraduate entrance examination forum and enriching the management experience of the campus postgraduate entrance examination forum.
The Android-based campus postgraduate entrance examination forum can be widely and comprehensively promoted through the Internet, so that as many members as possible can understand and be familiar with the convenience and efficiency of the Android-based campus postgraduate entrance examination forum. It not only provides services to members, but also promotes itself, so that More members know themselves. For campus postgraduate entrance examination forums, if you have your own APP, you can get better management through the system and improve your image at the same time.
The current status and trends of this app design, from the design of requirements, structure, database, etc. to the implementation of the app, are front-end and back-end implementation respectively. The content of the paper shows the development process from the aspects of system design, description, implementation, analysis, and testing. This app chooses a feasible development plan based on the actual situation, and uses the Java programming language and MySQL database to realize all the functions of the app. Next, the system is tested to see if there are loopholes in the system and user permissions are tested to improve the app. Finally, the app Completion meets relevant standards.
2. System functions
This disaster rescue system mainly includes two functional modules, namely user function module and administrator function module.
(1) Administrator module: The main modules include homepage, personal center, member management, topic classification management, postgraduate entrance examination forum management, system management and other functions.
(2) User module: Users can enter the APP to perform operations such as home page, postgraduate entrance examination forum, and mine.
3. System project screenshots
3.1APP side
Member login. Members enter the app, enter their account number and password, and perform system login operations.
Member registration, enter the member registration page, and perform registration operations by filling in user name, password, confirmation password, name, age, gender, mobile phone and other information
After members log in to the system, they can perform detailed operations on the home page, postgraduate entrance examination forum, mine, etc.
Postgraduate entrance examination forum. On the postgraduate entrance examination forum page, you can view the article title, topic classification, keywords, distribution date, account number, name, number of clicks, likes and other information, and perform like operations.
Users can operate the postgraduate entrance examination forum, my collection management, contact us and other detailed information on my page.
User information: save the account, password, name, age, gender, mobile phone, photo and other information on the user information page.
3.2Backend management
The administrator logs in. The administrator enters the user name, password, and clicks to log in to enter the system operation.
After the administrator logs in to the system, he can view the homepage, personal center, member management, topic classification management, postgraduate entrance examination forum management, system management and other functions, and can also perform corresponding operations on each function one by one.
Member management. On the member management page, you can perform detailed operations, modify or delete the index, account number, name, age, gender, mobile phone, photos and other contents.
Topic classification management. On the topic classification management page, you can perform operations such as detailing, modifying or deleting the index, topic classification and other contents.
Postgraduate entrance examination forum management. On the postgraduate entrance examination forum management page, you can perform detailed operations, modify, view comments, delete and other operations on the index, article title, topic classification, keywords, cover, release date, account number, name and other contents.
System management. On the carousel management page, you can perform detailed and modification operations on indexes, names, values, etc. You can also perform corresponding operations on About Us and Contact Us.
4. Core code
4.1 Login related
package com.controller;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.annotation.IgnoreAuth;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.entity.TokenEntity;
import com.entity.UserEntity;
import com.service.TokenService;
import com.service.UserService;
import com.utils.CommonUtil;
import com.utils.MD5Util;
import com.utils.MPUtil;
import com.utils.PageUtils;
import com.utils.R;
import com.utils.ValidatorUtils;
/**
* 登录相关
*/
@RequestMapping("users")
@RestController
public class UserController{
@Autowired
private UserService userService;
@Autowired
private TokenService tokenService;
/**
* 登录
*/
@IgnoreAuth
@PostMapping(value = "/login")
public R login(String username, String password, String captcha, HttpServletRequest request) {
UserEntity user = userService.selectOne(new EntityWrapper().eq("username", username));
if(user==null || !user.getPassword().equals(password)) {
return R.error("账号或密码不正确");
}
String token = tokenService.generateToken(user.getId(),username, "users", user.getRole());
return R.ok().put("token", token);
}
/**
* 注册
*/
@IgnoreAuth
@PostMapping(value = "/register")
public R register(@RequestBody UserEntity user){
// ValidatorUtils.validateEntity(user);
if(userService.selectOne(new EntityWrapper().eq("username", user.getUsername())) !=null) {
return R.error("用户已存在");
}
userService.insert(user);
return R.ok();
}
/**
* 退出
*/
@GetMapping(value = "logout")
public R logout(HttpServletRequest request) {
request.getSession().invalidate();
return R.ok("退出成功");
}
/**
* 密码重置
*/
@IgnoreAuth
@RequestMapping(value = "/resetPass")
public R resetPass(String username, HttpServletRequest request){
UserEntity user = userService.selectOne(new EntityWrapper().eq("username", username));
if(user==null) {
return R.error("账号不存在");
}
user.setPassword("123456");
userService.update(user,null);
return R.ok("密码已重置为：123456");
}
/**
* 列表
*/
@RequestMapping("/page")
public R page(@RequestParam Map params,UserEntity user){
EntityWrapper ew = new EntityWrapper();
PageUtils page = userService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.allLike(ew, user), params), params));
return R.ok().put("data", page);
}
/**
* 列表
*/
@RequestMapping("/list")
public R list( UserEntity user){
EntityWrapper ew = new EntityWrapper();
ew.allEq(MPUtil.allEQMapPre( user, "user"));
return R.ok().put("data", userService.selectListView(ew));
}
/**
* 信息
*/
@RequestMapping("/info/{id}")
public R info(@PathVariable("id") String id){
UserEntity user = userService.selectById(id);
return R.ok().put("data", user);
}
/**
* 获取用户的session用户信息
*/
@RequestMapping("/session")
public R getCurrUser(HttpServletRequest request){
Long id = (Long)request.getSession().getAttribute("userId");
UserEntity user = userService.selectById(id);
return R.ok().put("data", user);
}
/**
* 保存
*/
@PostMapping("/save")
public R save(@RequestBody UserEntity user){
// ValidatorUtils.validateEntity(user);
if(userService.selectOne(new EntityWrapper().eq("username", user.getUsername())) !=null) {
return R.error("用户已存在");
}
userService.insert(user);
return R.ok();
}
/**
* 修改
*/
@RequestMapping("/update")
public R update(@RequestBody UserEntity user){
// ValidatorUtils.validateEntity(user);
userService.updateById(user);//全部更新
return R.ok();
}
/**
* 删除
*/
@RequestMapping("/delete")
public R delete(@RequestBody Long[] ids){
userService.deleteBatchIds(Arrays.asList(ids));
return R.ok();
}
}
4.2 File upload
package com.controller;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.UUID;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.util.ResourceUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.annotation.IgnoreAuth;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.entity.ConfigEntity;
import com.entity.EIException;
import com.service.ConfigService;
import com.utils.R;
/**
* 上传文件映射表
*/
@RestController
@RequestMapping("file")
@SuppressWarnings({
"unchecked","rawtypes"})
public class FileController{
@Autowired
private ConfigService configService;
/**
* 上传文件
*/
@RequestMapping("/upload")
public R upload(@RequestParam("file") MultipartFile file,String type) throws Exception {
if (file.isEmpty()) {
throw new EIException("上传文件不能为空");
}
String fileExt = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);
File path = new File(ResourceUtils.getURL("classpath:static").getPath());
if(!path.exists()) {
path = new File("");
}
File upload = new File(path.getAbsolutePath(),"/upload/");
if(!upload.exists()) {
upload.mkdirs();
}
String fileName = new Date().getTime()+"."+fileExt;
File dest = new File(upload.getAbsolutePath()+"/"+fileName);
file.transferTo(dest);
FileUtils.copyFile(dest, new File("C:\\Users\\Desktop\\jiadian\\springbootl7own\\src\\main\\resources\\static\\upload"+"/"+fileName));
if(StringUtils.isNotBlank(type) && type.equals("1")) {
ConfigEntity configEntity = configService.selectOne(new EntityWrapper().eq("name", "faceFile"));
if(configEntity==null) {
configEntity = new ConfigEntity();
configEntity.setName("faceFile");
configEntity.setValue(fileName);
} else {
configEntity.setValue(fileName);
}
configService.insertOrUpdate(configEntity);
}
return R.ok().put("file", fileName);
}
/**
* 下载文件
*/
@IgnoreAuth
@RequestMapping("/download")
public ResponseEntity download(@RequestParam String fileName) {
try {
File path = new File(ResourceUtils.getURL("classpath:static").getPath());
if(!path.exists()) {
path = new File("");
}
File upload = new File(path.getAbsolutePath(),"/upload/");
if(!upload.exists()) {
upload.mkdirs();
}
File file = new File(upload.getAbsolutePath()+"/"+fileName);
if(file.exists()){
/*if(!fileService.canRead(file, SessionManager.getSessionUser())){
getResponse().sendError(403);
}*/
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.setContentDispositionFormData("attachment", fileName);
return new ResponseEntity(FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED);
}
} catch (IOException e) {
e.printStackTrace();
}
return new ResponseEntity(HttpStatus.INTERNAL_SERVER_ERROR);
}
}
4.3 Packaging
package com.utils;
import java.util.HashMap;
import java.util.Map;
/**
* 返回数据
*/
public class R extends HashMap {
private static final long serialVersionUID = 1L;
public R() {
put("code", 0);
}
public static R error() {
return error(500, "未知异常，请联系管理员");
}
public static R error(String msg) {
return error(500, msg);
}
public static R error(int code, String msg) {
R r = new R();
r.put("code", code);
r.put("msg", msg);
return r;
}
public static R ok(String msg) {
R r = new R();
r.put("msg", msg);
return r;
}
public static R ok(Map map) {
R r = new R();
r.putAll(map);
return r;
}
public static R ok() {
return new R();
}
public R put(String key, Object value) {
super.put(key, value);
return this;
}
}