Springboot implementa la adición, eliminación, modificación y verificación del código más detallado (idea) de inicio de sesión simple
- 1. Usa la idea para crear un proyecto springboot
- 2. Comience a realizar la función después de que se complete la configuración
- 3. Estructura específica
- 4. Darse cuenta del resultado (el estilo es descargar bootstrap)
- 5. Resumen
1. Usa la idea para crear un proyecto springboot
1.1 Importar dependencias web y compatibilidad con lombok y thymeleaf
pom.xml
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
1.2 La introducción de recursos estáticos
Sacando lecciones del contenido del proyecto de Kuangshen, dijo, búsqueda en la nube de código de plantilla Kuangshen dijo que puede buscar sobre recursos estáticos
Contenido del archivo 1.3application.properties
application.properties
spring.thymeleaf.cache=false
server.servlet.context-path=/feng
#国际化
spring.messages.basename=i18n.login
#时间日期格式化
spring.mvc.format.date=yyyy-MM-dd
1.4 Configuración de internacionalización
login.properties
login.btn=登录
login.password=密码
login.remember=记住我
login.tip=请登录
login.username=用户名
Los otros dos archivos de configuración están vinculados a los atributos correspondientes por separado.
2. Comience a realizar la función después de que se complete la configuración
2.1 Cree un paquete de clase de entidad (pojo) bajo el mismo nivel de la clase de inicio predeterminada
2.1.1 Crear clase de entidad de departamento
Department.java
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
//部门表
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Department {
private Integer id;
private String departmentName;
}
2.1.2 Crear clase de entidad de empleado
Employee.java
import lombok.Data;
import lombok.NoArgsConstructor;
import java.util.Date;
//员工表
@Data
@NoArgsConstructor
public class Employee {
private Integer id;
private String lastName;
private String Email;
private Integer gender; //0:女 1：男
private Department department;
private Date birth;
public Employee(Integer id, String lastName, String email, Integer gender, Department department) {
this.id = id;
this.lastName = lastName;
Email = email;
this.gender = gender;
this.department = department;
this.birth = new Date();
}
}
2.2 Crear la capa dao (sin base de datos asociada, datos simulados en la base de datos)
2.2.1 Crear dao de departamento y definir negocios específicos
DepartamentoDao.java
import com.feng.pojo.Department;
import org.springframework.stereotype.Repository;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
//部门dao
@Repository
public class DepartmentDao {
//模拟数据库中的数据
private static Map<Integer, Department> departments = null;
static {
departments = new HashMap<Integer, Department>();//创建一个部门表
departments.put(101,new Department(101,"教学部"));
departments.put(102,new Department(102,"市场部"));
departments.put(103,new Department(103,"教研部"));
departments.put(104,new Department(104,"运营部"));
departments.put(105,new Department(105,"后勤部"));
}
//获得所有部门信息
public Collection<Department> getDepartments(){
return departments.values();
}
//通过id得到部门
public Department getDepartmentById(Integer id){
return departments.get(id);
}
}
2.2.2 La misma idea de crear dao de empleado y dao de departamento
EmployeeDao.java
import com.feng.pojo.Department;
import com.feng.pojo.Employee;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
@Repository
public class EmployeeDao {
//模拟数据库信息
private static Map<Integer, Employee> employees = null;
//员工有所属的部门
@Autowired
private DepartmentDao departmentDao;
static {
employees = new HashMap<Integer, Employee>();
employees.put(1001,new Employee(1001,"AA","[email protected]",1,new Department(1001,"后勤部")));
employees.put(1002,new Employee(1002,"BB","[email protected]",0,new Department(1002,"教学部")));
employees.put(1003,new Employee(1003,"CC","[email protected]",1,new Department(1003,"教研部")));
employees.put(1004,new Employee(1004,"DD","[email protected]",0,new Department(1004,"运营部")));
employees.put(1005,new Employee(1005,"EE","[email protected]",1,new Department(1005,"市场部")));
}
//主键自增
private static Integer initId = 1006;
//增加一个员工
public void save(Employee employee){
if (employee.getId()==null){
employee.setId(initId++);
}
employee.setDepartment(departmentDao.getDepartmentById(employee.getDepartment().getId()));
employees.put(employee.getId(),employee);
}
//查询全部员工信息
public Collection<Employee> getAll(){
return employees.values();
}
//通过id查询员工
public Employee getEmployeeById(Integer id){
return employees.get(id);
}
//通过id删除员工
public void delete(Integer id){
employees.remove(id);
}
}
2.3 Crear la capa del controlador
EmployeeController.Java (el negocio específico y el salto de la operación del empleado)
import com.feng.dao.DepartmentDao;
import com.feng.dao.EmployeeDao;
import com.feng.pojo.Department;
import com.feng.pojo.Employee;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
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.RequestMapping;
import java.util.Collection;
@Controller
public class EmployeeController {
@Autowired
EmployeeDao employeeDao;
@Autowired
DepartmentDao departmentDao;
@RequestMapping("/emps")
public String list(Model model){
Collection<Employee> employees = employeeDao.getAll();
model.addAttribute("emps",employees);
return "emp/list";
}
@GetMapping("/emp")
public String toAddpage(Model model){
//查出所有部门的信息
Collection<Department> departments = departmentDao.getDepartments();
model.addAttribute("departments",departments);
return "emp/add";
}
@PostMapping("/emp")
public String addEmp(Employee employee){
employeeDao.save(employee);//调用底层业余方法保存员工信息
return "redirect:/emps";
}
// 修改页面
@GetMapping("/emp/{id}")
public String toUpdateEmp(@PathVariable("id")Integer id,Model model){
//查出原来的数据
Employee employee = employeeDao.getEmployeeById(id);
model.addAttribute("emp",employee);
//查出所有部门的信息
Collection<Department> departments = departmentDao.getDepartments();
model.addAttribute("departments",departments);
return "emp/update";
}
@PostMapping("/updateEmp")
public String updateEmp(Employee employee){
employeeDao.save(employee);
return "redirect:/emps";
}
//删除员工
@GetMapping("/delemp/{id}")
public String deleteEmp(@PathVariable("id")int id){
employeeDao.delete(id);
return "redirect:/emps";
}
}
LoginController.java (negocio específico y salta a la página de inicio)
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.thymeleaf.util.StringUtils;
import javax.servlet.http.HttpSession;
@Controller
public class LoginController {
@RequestMapping("/user/login")
public String login(
@RequestParam("username") String username,
@RequestParam("password") String password,
Model model, HttpSession session){
//具体业务
if (!StringUtils.isEmpty(username) && "123456".equals(password)){
session.setAttribute("loginUser",username);
return "redirect:/main.html";
}else {
//告诉用户，你登录失败了！
model.addAttribute("msg","用户名或者密码错误了！");
return "index";
}
}
//注销
@RequestMapping("/user/logout")
public String logout(HttpSession session){
session.invalidate();
return "redirect:/index.html";
}
}
2.4 Crea una configuración para almacenar herramientas
2.4.1 Definir el interceptor para la página de inicio de sesión
LoginHandlerIntercepter.Java
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginHandlerIntercepter implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//登陆成功之后，应该有用户的sessoin
Object loginUser = request.getSession().getAttribute("loginUser");
if (loginUser==null){
//没有登录
request.setAttribute("msg","没有权限，请登录");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else {
return true;
}
}
}
2.4.2 Herramientas nacionalizadas
MyLocaleResolver.Java
import org.thymeleaf.util.StringUtils;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;
public class MyLocaleResolver implements LocaleResolver {
//解析请求
@Override
public Locale resolveLocale(HttpServletRequest request) {
//获取请求中的语言参数
String language = request.getParameter("l");
Locale locale = Locale.getDefault(); //如果没有就用磨人的
//如果请求的链接携带了国际化的参数
if (!StringUtils.isEmpty(language)){
//zh_CN
String[] split = language.split("_");
//国家，地区
locale = new Locale(split[0],split[1]);
}
return locale;
}
@Override
public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {
}
}
2.4.3 Crear clase de herramienta MVC
MyMVCConfig.Java
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class MyMVCConfig implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("index");
registry.addViewController("/index.html").setViewName("index");
registry.addViewController("/main.html").setViewName("dashboard");
}
@Bean
public LocaleResolver localeResolver(){
return new MyLocaleResolver();
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new LoginHandlerIntercepter())
.addPathPatterns("/**")
.excludePathPatterns("/index.html","/","/user/login","/css/*","/js/**","/img/**");
}
}
3. Estructura específica
4. Darse cuenta del resultado (el estilo es descargar bootstrap)
4.1 Página de inicio de sesión (debido a que el nombre de usuario de datos simulados es arbitrario, la contraseña es 123456)
4.2 página de éxito de inicio de sesión
4.3 Lista de empleados
Adiciones y eliminaciones
Eliminar directamente, dejando dos datos.
5. Resumen
第一次上手springboot，简单的总结，这个springboot项目运用了bootstrap的样式，
还用了thymeleaf模板引擎，还有lombok插件，还加上了国际化需求，之后的学习
会慢慢跟着学习和完善功能。这是第一条博客，这个项目或者有什么不好，希望各
位大佬多多指点，都是看着视频学习的，一起加油吧！