解释如下代码:public interface PostService { List<Post> findAll(); List<Post> findBySL(int S, int L); boolean addPost(Post post); List<Post> findById(long id); List<Post> findByUname(String username); boolean deleteById(long id); List<Post> findByTypeName(String typeName); boolean updateStatus(Post post); boolean updateViewCount(Post post); }
时间: 2023-06-03 21:06:40 浏览: 70
这是一个接口定义的代码段,定义了一些方法用于发表、查看、修改和删除帖子。其中包括了查找全部帖子,按标签查找帖子,添加帖子,按ID查找帖子,按用户名查找帖子,按帖子类型查找帖子,修改帖子状态和修改帖子阅读数量等方法。
相关问题
我使用 MySQL 创建了一个用户表TbUser,并且使用@GetMapping("/alterListUsers") public String alterListUsers(@RequestParam(defaultValue = "1") int pageNum, Model model) { Page<TbUser> page = tbUserService.findUsers(pageNum); List<TbUser> userList = page.getContent(); model.addAttribute("userList", userList); model.addAttribute("currentPage", pageNum); model.addAttribute("totalPages", page.getTotalPages()); return "management/user-alter"; }完成了用户分页查询功能,查询的结果返回了user-alter.html,请使用springboot+hibernate+thymeleaf帮助我完成编辑用户的功能,点击编辑按钮后,弹窗一个表单可以修改用户所有信息,点击确定后将信息保存到数据库,包含DAO、Controller、Entity、Service、impl的详细代码
好的,以下是实现编辑用户的代码:
**TbUser.java(Entity):**
```java
@Entity
@Table(name = "tb_user")
public class TbUser {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(nullable = false, unique = true)
private String username;
private String password;
@Column(nullable = false)
private String email;
// getters and setters
// equals and hashCode
}
```
**TbUserRepository.java(DAO):**
```java
@Repository
public interface TbUserRepository extends JpaRepository<TbUser, Long> {
}
```
**TbUserService.java(Service):**
```java
@Service
public class TbUserService {
@Autowired
private TbUserRepository tbUserRepository;
public Page<TbUser> findUsers(int pageNum) {
return tbUserRepository.findAll(PageRequest.of(pageNum - 1, 10));
}
public TbUser findById(Long id) {
return tbUserRepository.findById(id).orElse(null);
}
public TbUser save(TbUser tbUser) {
return tbUserRepository.save(tbUser);
}
}
```
**TbUserServiceImpl.java(Service实现类):**
```java
@Service
public class TbUserServiceImpl implements TbUserService {
@Autowired
private TbUserRepository tbUserRepository;
@Override
public Page<TbUser> findUsers(int pageNum) {
return tbUserRepository.findAll(PageRequest.of(pageNum - 1, 10));
}
@Override
public TbUser findById(Long id) {
return tbUserRepository.findById(id).orElse(null);
}
@Override
public TbUser save(TbUser tbUser) {
return tbUserRepository.save(tbUser);
}
}
```
**UserController.java(Controller):**
```java
@Controller
@RequestMapping("/management")
public class UserController {
@Autowired
private TbUserService tbUserService;
@GetMapping("/alterListUsers")
public String alterListUsers(@RequestParam(defaultValue = "1") int pageNum, Model model) {
Page<TbUser> page = tbUserService.findUsers(pageNum);
List<TbUser> userList = page.getContent();
model.addAttribute("userList", userList);
model.addAttribute("currentPage", pageNum);
model.addAttribute("totalPages", page.getTotalPages());
return "management/user-alter";
}
@GetMapping("/editUser/{id}")
public String editUser(@PathVariable Long id, Model model) {
TbUser tbUser = tbUserService.findById(id);
if (tbUser != null) {
model.addAttribute("tbUser", tbUser);
return "management/user-edit";
} else {
return "redirect:/management/alterListUsers";
}
}
@PostMapping("/saveUser")
public String saveUser(TbUser tbUser) {
tbUserService.save(tbUser);
return "redirect:/management/alterListUsers";
}
}
```
**user-alter.html(用户列表页面):**
```html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>用户列表</title>
</head>
<body>
<table>
<thead>
<tr>
<th>ID</th>
<th>用户名</th>
<th>邮箱</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr th:each="tbUser : ${userList}">
<td th:text="${tbUser.id}"></td>
<td th:text="${tbUser.username}"></td>
<td th:text="${tbUser.email}"></td>
<td>
<a th:href="@{/management/editUser/__${tbUser.id}__}">编辑</a>
</td>
</tr>
</tbody>
</table>
<div>
<ul>
<li th:if="${currentPage != 1}">
<a th:href="@{/management/alterListUsers(pageNum=1)}">首页</a>
</li>
<li th:if="${currentPage > 1}">
<a th:href="@{/management/alterListUsers(pageNum=${currentPage - 1})}">上一页</a>
</li>
<li th:if="${currentPage < totalPages}">
<a th:href="@{/management/alterListUsers(pageNum=${currentPage + 1})}">下一页</a>
</li>
<li th:if="${currentPage != totalPages}">
<a th:href="@{/management/alterListUsers(pageNum=${totalPages})}">尾页</a>
</li>
</ul>
</div>
</body>
</html>
```
**user-edit.html(用户编辑页面):**
```html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>编辑用户信息</title>
</head>
<body>
<form th:action="@{/management/saveUser}" method="post">
<input type="hidden" th:field="*{id}"/>
<div>
<label>用户名:</label>
<input type="text" th:field="*{username}"/>
</div>
<div>
<label>密码:</label>
<input type="password" th:field="*{password}"/>
</div>
<div>
<label>邮箱:</label>
<input type="email" th:field="*{email}"/>
</div>
<div>
<button type="submit">保存</button>
</div>
</form>
</body>
</html>
```
以上就是实现编辑用户功能的详细代码。
我使用 MySQL 创建了一个用户表TbUser,userId类型为Integer,status默认值为0,并且使用@GetMapping("/deleteListUsers") public String deleteListUsers(@RequestParam(defaultValue = "1") int pageNum, Model model) { Page<TbUser> page = tbUserService.findUsers(pageNum); List<TbUser> userList = page.getContent(); model.addAttribute("userList", userList); model.addAttribute("currentPage", pageNum); model.addAttribute("totalPages", page.getTotalPages()); return "management/user-delete"; }完成了用户分页查询功能,查询的结果返回了user-delete.html,请帮使用springboot+hibernate+thymeleaf帮助我完成删除用户的功能,删除操作不做物理删除,只做逻辑删除(0表示未删除,1表示已删除),使用逻辑删除标识列status来记录,包含DAO、Controller、Entity、Service、impl
好的,很乐意为您解答。首先,我们来创建实体类TbUser:
```java
@Entity
@Table(name = "tb_user")
public class TbUser {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer userId;
@Column(nullable = false)
private String username;
@Column(nullable = false)
private String password;
private Integer status = 0;
// 省略getter和setter方法
}
```
然后,创建DAO接口TbUserDao:
```java
@Repository
public interface TbUserDao extends JpaRepository<TbUser, Integer> {
}
```
创建TbUserService接口和TbUserServiceImpl实现类:
```java
public interface TbUserService {
Page<TbUser> findUsers(int pageNum);
void deleteUser(Integer userId);
}
@Service
@Transactional
public class TbUserServiceImpl implements TbUserService {
@Autowired
private TbUserDao tbUserDao;
@Override
public Page<TbUser> findUsers(int pageNum) {
Pageable pageable = PageRequest.of(pageNum - 1, 10, Sort.by(Sort.Direction.ASC, "userId"));
return tbUserDao.findAll(pageable);
}
@Override
public void deleteUser(Integer userId) {
TbUser tbUser = tbUserDao.getOne(userId);
tbUser.setStatus(1);
tbUserDao.save(tbUser);
}
}
```
最后,创建Controller类TbUserController:
```java
@Controller
@RequestMapping("/user")
public class TbUserController {
@Autowired
private TbUserService tbUserService;
@GetMapping("/deleteListUsers")
public String deleteListUsers(@RequestParam(defaultValue = "1") int pageNum, Model model) {
Page<TbUser> page = tbUserService.findUsers(pageNum);
List<TbUser> userList = page.getContent();
model.addAttribute("userList", userList);
model.addAttribute("currentPage", pageNum);
model.addAttribute("totalPages", page.getTotalPages());
return "management/user-delete";
}
@PostMapping("/deleteUser")
@ResponseBody
public String deleteUser(@RequestParam Integer userId) {
try {
tbUserService.deleteUser(userId);
return "success";
} catch (Exception e) {
return "error";
}
}
}
```
在user-delete.html中添加删除用户的按钮,并通过Ajax异步请求后台删除用户:
```html
<table>
<!-- 省略表头 -->
<tbody>
<tr th:each="user : ${userList}">
<td th:text="${user.userId}"></td>
<td th:text="${user.username}"></td>
<td th:text="${user.password}"></td>
<td th:text="${user.status} == 0 ? '未删除' : '已删除'"></td>
<td>
<button class="btn btn-danger" th:attr="data-id=${user.userId}" onclick="deleteUser(this)">删除</button>
</td>
</tr>
</tbody>
</table>
<script>
function deleteUser(btn) {
if (confirm("确定要删除该用户吗?")) {
var userId = $(btn).data("id");
$.ajax({
url: "/user/deleteUser",
type: "POST",
data: {userId: userId},
success: function(result) {
if (result == "success") {
alert("删除成功");
window.location.reload();
} else {
alert("删除失败");
}
},
error: function() {
alert("删除异常");
}
});
}
}
</script>
```
这样,我们就完成了使用springboot+hibernate+thymeleaf删除用户的功能,只做逻辑删除,使用逻辑删除标识列status来记录。
阅读全文