1.实体类设计

首先就是需要用到的新闻类，新闻类需要跟的就是id、标题、内容等内容。

[code]package com.zr0726.news.po;

import javax.persistence.*;
import java.util.Date;

@Entity
@Table(name = "t_news")
public class News {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String title;
@Basic(fetch = FetchType.LAZY)
@Lob
private String content;
private String firstPicture;
private String flag;
private String views;
private boolean appreciation;
private boolean shareStatement;
private boolean commentabled;
private boolean published;
private boolean recommend;
@Temporal(TemporalType.TIMESTAMP)
private Date createTime;
@Temporal(TemporalType.TIMESTAMP)
private Date updateTime;

@ManyToOne
private Type type;

@ManyToOne
private User user;

public News(){
}

public Long getId() {
return id;
}

public void setId(Long id) {
this.id = id;
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getContent() {
return content;
}

public void setContent(String content) {
this.content = content;
}

public String getFirstPicture() {
return firstPicture;
}

public void setFirstPicture(String firstPicture) {
this.firstPicture = firstPicture;
}

public String getFlag() {
return flag;
}

public void setFlag(String flag) {
this.flag = flag;
}

public String getViews() {
return views;
}

public void setViews(String views) {
this.views = views;
}

public boolean isAppreciation() {
return appreciation;
}

public void setAppreciation(boolean appreciation) {
this.appreciation = appreciation;
}

public boolean isShareStatement() {
return shareStatement;
}

public void setShareStatement(boolean shareStatement) {
this.shareStatement = shareStatement;
}

public boolean isCommentabled() {
return commentabled;
}

public void setCommentabled(boolean commentabled) {
this.commentabled = commentabled;
}

public boolean isPublished() {
return published;
}

public void setPublished(boolean published) {
this.published = published;
}

public boolean isRecommend() {
return recommend;
}

public void setRecommend(boolean recommend) {
this.recommend = recommend;
}

public Date getCreateTime() {
return createTime;
}

public void setCreateTime(Date createTime) {
this.createTime = createTime;
}

public Date getUpdateTime() {
return updateTime;
}

public void setUpdateTime(Date updateTime) {
this.updateTime = updateTime;
}

public Type getType() {
return type;
}

public void setType(Type type) {
this.type = type;
}

public User getUser() {
return user;
}

public void setUser(User user) {
this.user = user;
}

@Override
public String toString() {
return "News{" +
"id=" + id +
", title='" + title + '\'' +
", content='" + content + '\'' +
", firstPicture='" + firstPicture + '\'' +
", flag='" + flag + '\'' +
", views='" + views + '\'' +
", appreciation=" + appreciation +
", shareStatement=" + shareStatement +
", commentabled=" + commentabled +
", published=" + published +
", recommend=" + recommend +
", createTime=" + createTime +
", updateTime=" + updateTime +
", type=" + type +
", user=" + user +
'}';
}
}

[code]package com.zr0726.news.po;

import javax.persistence.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

@Entity
@Table(name = "t_user")
public class User {

@Id     //主键标识
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String nickname;
private String username;
private String password;
private String email;
private String avatar;
private Integer type;
@Temporal(TemporalType.TIMESTAMP)
private Date createTime;
@Temporal(TemporalType.TIMESTAMP)
private Date updateTime;

@OneToMany(mappedBy = "user")
private List<News> newsList = new ArrayList<>();

public Long getId() {
return id;
}

public void setId(Long id) {
this.id = id;
}

public String getNickname() {
return nickname;
}

public void setNickname(String nickname) {
this.nickname = nickname;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public String getAvatar() {
return avatar;
}

public void setAvatar(String avatar) {
this.avatar = avatar;
}

public Integer getType() {
return type;
}

public void setType(Integer type) {
this.type = type;
}

public Date getCreateTime() {
return createTime;
}

public void setCreateTime(Date createTime) {
this.createTime = createTime;
}

public Date getUpdateTime() {
return updateTime;
}

public void setUpdateTime(Date updateTime) {
this.updateTime = updateTime;
}

public List<News> getNewsList() {
return newsList;
}

public void setNewsList(List<News> newsList) {
this.newsList = newsList;
}

@Override
public String toString() {
return "User{" +
"id=" + id +
", nickname='" + nickname + '\'' +
", username='" + username + '\'' +
", password='" + password + '\'' +
", email='" + email + '\'' +
", avatar='" + avatar + '\'' +
", type=" + type +
", createTime=" + createTime +
", updateTime=" + updateTime +
", newsList=" + newsList +
'}';
}
}

2.登录功能设计

首先要写的是UserRepository，用来提供用户相应的功能

[code]package com.zr0726.news.dao;

import com.zr0726.news.po.User;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository<User,Long> {

User findByUsernameAndPassword(String username,String password);

}

还有UserServiceImpl用来实现具体的service服务

[code]package com.zr0726.news.service.impl;

import com.zr0726.news.dao.UserRepository;
import com.zr0726.news.po.User;
import com.zr0726.news.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

@Autowired
private UserRepository userRepository;

@Override
public User checkUsers(String username, String password) {
return userRepository.findByUsernameAndPassword(username,password);
}
}

[code]package com.zr0726.news.service;

import com.zr0726.news.po.User;

public interface UserService {

User checkUsers(String username,String password);

}

[code]package com.zr0726.news.web.admin;

import com.zr0726.news.po.User;
import com.zr0726.news.service.UserService;
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.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;

@Controller
@RequestMapping("/admin")
public class LoginController {

@Autowired
private UserService userService;

@GetMapping
public String loginPage(){
return "admin/login";
}

@PostMapping("/login")
public String login(@RequestParam String username, @RequestParam String password,
HttpSession session, RedirectAttributes attributes){
User user = userService.checkUsers(username,password);
if(user!=null){
user.setPassword(null);
session.setAttribute("user",user);
return "admin/index";
}else{
attributes.addFlashAttribute("message","用户名或密码错误");
return "redirect:/admin";
}
}

@GetMapping("/logout")
public String logout(HttpSession session){
session.removeAttribute("user");
return "redirect:/admin";
}

}

[code]package com.zr0726.news;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class NewsApplication {

public static void main(String[] args) {
SpringApplication.run(NewsApplication.class, args);
}

}

3.类别分类展示

然后就是实现分类的功能，主要是根据type来分类

[code]package com.zr0726.news.service.impl;

import com.zr0726.news.dao.TypeRepository;
import com.zr0726.news.po.Type;
import com.zr0726.news.service.TypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

@Service
public class TypeServiceImpl implements TypeService {

@Autowired
private TypeRepository typeRepository;

@Override
public Page<Type> listType(Pageable pageable) {
return typeRepository.findAll(pageable);
}
}

[code]package com.zr0726.news.service;

import com.zr0726.news.po.Type;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;

public interface TypeService {

Page<Type> listType(Pageable pageable);

}

4.运行

前端代码略去，直接看最终的测试效果吧

5.总结

今天是写springboot的第二天，主要是实现新闻相关的模块，可以实现登录功能和新闻的分类查询功能，写的时候发现springboot和springmvc其实并没有太大的区别，不过springboot配置方面要比ssm简单很多，没有那么多xml文件，只有一个yml文件，springboot相关的配置都在里面配置，可以让程序员更加专注与写相应的逻辑功能，而不是配置相关的模块。