JAVA语言用springboot框架实现简单的登录
dao.UserDao
package com.zr.dao;
import com.zr.po.User;
import org.springframework.data.jpa.repository.JpaRepository;
public interface UserDao extends JpaRepository
User findByUsernameAndPassword(String username, String password);
}
po.Blog
@Entity
@Table(name = “t_blog”)
public class Blog {
@Id
@GeneratedValue
private Long id;
private String title;
@Basic(fetch = FetchType.LAZY)
@Lob
private String content;
private String firstPicture;
private String flag;
private Integer 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;
@ManyToMany(cascade = {CascadeType.PERSIST})
private List tags = new ArrayList<>();
@ManyToOne
private User user;
@OneToMany(mappedBy = "blog")
private List comments = new ArrayList<>();
@Transient
private String tagIds;
private String description;
public Blog() {
}
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 Integer getViews() {
return views;
}
public void setViews(Integer 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 List getTags() {
return tags;
}
public void setTags(List tags) {
this.tags = tags;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public List getComments() {
return comments;
}
public void setComments(List comments) {
this.comments = comments;
}
public String getTagIds() {
return tagIds;
}
public void setTagIds(String tagIds) {
this.tagIds = tagIds;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public void init() {
this.tagIds = tagsToIds(this.getTags());
}
//1,2,3
private String tagsToIds(List tags) {
if (!tags.isEmpty()) {
StringBuffer ids = new StringBuffer();
boolean flag = false;
for (Tag tag : tags) {
if (flag) {
ids.append(",");
} else {
flag = true;
}
ids.append(tag.getId());
}
return ids.toString();
} else {
return tagIds;
}
}
@Override
public String toString() {
return "Blog{" +
"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 +
", tags=" + tags +
", user=" + user +
", comments=" + comments +
", tagIds='" + tagIds + '\'' +
", description='" + description + '\'' +
'}';
}
}
po.comment
@Entity
@Table(name = “t_comment”)
public class Comment {
@Id
@GeneratedValue
private Long id;
private String nickname;
private String email;
private String content;
private String avatar;
@Temporal(TemporalType.TIMESTAMP)
private Date createTime;
@ManyToOne
private Blog blog;
@OneToMany(mappedBy = "parentComment")
private List replyComments = new ArrayList<>();
@ManyToOne
private Comment parentComment;
public Comment() {
}
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 getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getAvatar() {
return avatar;
}
public void setAvatar(String avatar) {
this.avatar = avatar;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public Blog getBlog() {
return blog;
}
public void setBlog(Blog blog) {
this.blog = blog;
}
public List getReplyComments() {
return replyComments;
}
public void setReplyComments(List replyComments) {
this.replyComments = replyComments;
}
public Comment getParentComment() {
return parentComment;
}
public void setParentComment(Comment parentComment) {
this.parentComment = parentComment;
}
@Override
public String toString() {
return "Comment{" +
"id=" + id +
", nickname='" + nickname + '\'' +
", email='" + email + '\'' +
", content='" + content + '\'' +
", avatar='" + avatar + '\'' +
", createTime=" + createTime +
'}';
}
}
po.Tag
@Entity
@Table(name = “t_tag”)
public class Tag {
@Id
@GeneratedValue
private Long id;
private String name;
@ManyToMany(mappedBy = "tags")
private List blogs = new ArrayList<>();
public Tag() {
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List getBlogs() {
return blogs;
}
public void setBlogs(List blogs) {
this.blogs = blogs;
}
@Override
public String toString() {
return "Tag{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}
po.Type
@Entity
@Table(name = “t_type”)
public class Type {
@Id
@GeneratedValue
private Long id;
private String name;
@OneToMany(mappedBy = "type")
private List blogs = new ArrayList<>();
public Type() {
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List getBlogs() {
return blogs;
}
public void setBlogs(List blogs) {
this.blogs = blogs;
}
@Override
public String toString() {
return "Type{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}
po.User
@Entity
@Table(name = “t_user”)
public class User {
@Id
@GeneratedValue
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 blogs = new ArrayList<>();
public User() {
}
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 getBlogs() {
return blogs;
}
public void setBlogs(List blogs) {
this.blogs = blogs;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", nickname='" + nickname + '\'' +
", username='" + username + '\'' +
", password='" + password + '\'' +
", email='" + email + '\'' +
", avatar='" + avatar + '\'' +
", type=" + type +
", createTime=" + createTime +
", updateTime=" + updateTime +
'}';
}
}
service.impl.UserServiceimple
@Service
public class UserServiceImpl implements IUserService {
@Autowired
private UserDao userDao;
@Override
public User checkUser(String username, String password) {
return userDao.findByUsernameAndPassword(username, MD5Util.code(password));
}
}
service.IUserService
public interface IUserService {
User checkUser(String username, String password);
}
public class MD5Util {
/**
* MD5加密类
* @param str 要加密的字符串
* @return 加密后的字符串
*/
public static String code(String str){
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(str.getBytes());
byte[]byteDigest = md.digest();
int i;
StringBuffer buf = new StringBuffer("");
for (int offset = 0; offset < byteDigest.length; offset++) {
i = byteDigest[offset];
if (i < 0)
i += 256;
if (i < 16)
buf.append("0");
buf.append(Integer.toHexString(i));
}
//32位加密
return buf.toString();
// 16位的加密
//return buf.toString().substring(8, 24);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return null;
}
}
public static void main(String[] args) {
System.out.println(code("1"));
}
}
控制层
@Controller
@RequestMapping("/admin")
public class LoginController {
@Autowired
private IUserService userService;
@GetMapping
public String toLogin(){
return "admin/login";
}
@PostMapping("/login")
public String login(String username, String password, HttpSession session, RedirectAttributes redirectAttributes){
User user = userService.checkUser(username, password);
if(user!=null){
session.setAttribute("user",user);
return "admin/index";
}else{
redirectAttributes.addFlashAttribute("message","用户名和密码错误");
return "redirect:/admin";
}
}
@GetMapping("/logout")
public String logout(HttpSession session){
session.removeAttribute("user");
return "admin/login";
}