SpringMVC 学习（）——RESTRUL_CRUD_显示所有员工信息

employee.java

package com.xuehj.springmvc.crud.entity;

import java.util.Date;

import javax.validation.constraints.Past;

import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.format.annotation.NumberFormat;

public class Employee {

	private Integer id;
	@NotEmpty
	private String lastName;

	@Email
	private String email;
	/**
	 * 1 male, 0 female
	 */
	private Integer gender;
	
	private Department department;
	
	@Past
	@DateTimeFormat(pattern="yyyy-MM-dd")
	private Date birth;
	
	@NumberFormat(pattern="#,###,###.#")
	private Float salary;

	public Integer getId() {
		return id;
	}

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

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public String getEmail() {
		return email;
	}

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

	public Integer getGender() {
		return gender;
	}

	public void setGender(Integer gender) {
		this.gender = gender;
	}

	public Department getDepartment() {
		return department;
	}

	public void setDepartment(Department department) {
		this.department = department;
	}

	public Date getBirth() {
		return birth;
	}

	public void setBirth(Date birth) {
		this.birth = birth;
	}

	public Float getSalary() {
		return salary;
	}

	public void setSalary(Float salary) {
		this.salary = salary;
	}

	@Override
	public String toString() {
		return "Employee [id=" + id + ", lastName=" + lastName + ", email="
				+ email + ", gender=" + gender + ", department=" + department
				+ ", birth=" + birth + ", salary=" + salary + "]";
	}

	public Employee(Integer id, String lastName, String email, Integer gender,
			Department department) {
		super();
		this.id = id;
		this.lastName = lastName;
		this.email = email;
		this.gender = gender;
		this.department = department;
	}

	public Employee() {
	}
}

department.java

package com.xuehj.springmvc.crud.entity;

public class Department {

	private Integer id;
	private String departmentName;

	public Department() {
	}
	
	public Department(int i, String string) {
		this.id = i;
		this.departmentName = string;
	}

	public Integer getId() {
		return id;
	}

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

	public String getDepartmentName() {
		return departmentName;
	}

	public void setDepartmentName(String departmentName) {
		this.departmentName = departmentName;
	}

	@Override
	public String toString() {
		return "Department [id=" + id + ", departmentName=" + departmentName
				+ "]";
	}
	
}

employeeDao.java

package com.xuehj.springmvc.crud.dao;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import org.springframework.stereotype.Repository;

import com.xuehj.springmvc.crud.entity.Department;

@Repository
public class DepartmentDao {

	private static Map<Integer, Department> departments = null;
	
	static{
		departments = new HashMap<>();
		
		departments.put(101, new Department(101, "D-AA"));
		departments.put(102, new Department(102, "D-BB"));
		departments.put(103, new Department(103, "D-CC"));
		departments.put(104, new Department(104, "D-DD"));
		departments.put(105, new Department(105, "D-EE"));
	}
	
	public Collection<Department> getDepartments(){
		return departments.values();
	}
	
	public Department getDepartment(Integer id){
		return departments.get(id);
	}
	
}

departmentDao.java

package com.xuehj.springmvc.crud.dao;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.xuehj.springmvc.crud.entity.Department;
import com.xuehj.springmvc.crud.entity.Employee;

@Repository
public class EmployeeDao {

    private static Map<Integer, Employee> employees = null;

    @Autowired
    private DepartmentDao departmentDao;

    static {
        employees = new HashMap<>();

        employees.put(1001, new Employee(1001, "E-AA", "[email protected]", 1, new Department(101, "D-AA")));
        employees.put(1002, new Employee(1002, "E-BB", "[email protected]", 1, new Department(102, "D-BB")));
        employees.put(1003, new Employee(1003, "E-CC", "[email protected]", 0, new Department(103, "D-CC")));
        employees.put(1004, new Employee(1004, "E-DD", "[email protected]", 0, new Department(104, "D-DD")));
        employees.put(1005, new Employee(1005, "E-EE", "[email protected]", 1, new Department(105, "D-EE")));
    }

    private static Integer initId = 1006;

    public void save(Employee employee) {
        if (employee.getId() == null) {
            employee.setId(initId++);
        }

        employee.setDepartment(departmentDao.getDepartment(employee.getDepartment().getId()));
        employees.put(employee.getId(), employee);
    }

    public Collection<Employee> getAll() {
        return employees.values();
    }

    public Employee get(Integer id) {
        return employees.get(id);
    }

    public void delete(Integer id) {
        employees.remove(id);
    }
}

employeeHandler.java

package com.xuehj.springmvc.handler;

import com.xuehj.springmvc.crud.dao.DepartmentDao;
import com.xuehj.springmvc.crud.dao.EmployeeDao;
import com.xuehj.springmvc.crud.entity.Employee;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.util.Map;

@Controller
public class EmployeeHandler {

    @Autowired
    private EmployeeDao employeeDao;
    @Autowired
    private DepartmentDao departmentDao;

    @RequestMapping("/emps")
    public String list(Map<String, Object> map) {
        map.put("employees", employeeDao.getAll());
        return "view/list.jsp";
    }

    @RequestMapping(value="/emp", method=RequestMethod.GET)
    public String input(Map<String, Object> map){
        map.put("departments", departmentDao.getDepartments());
        map.put("employee", new Employee());
        return "input";
    }
}

list.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--<%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt" %>--%>
<%--
  Created by IntelliJ IDEA.
  User: 薛恒杰
  Date: 2018/12/24
  Time: 9:39
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
    <head>
        <title>Title</title>
    </head>
    <body>
        <c:if test="${empty requestScope.employees }">
            没有任何员工信息.
        </c:if>
        <c:if test="${!empty requestScope.employees }">
            <table border="1" cellpadding="10" cellspacing="0">
                <tr>
                    <th>ID</th>
                    <th>LastName</th>
                    <th>Email</th>
                    <th>Gender</th>
                    <th>Department</th>
                    <th>Edit</th>
                    <th>Delete</th>
                </tr>

                <c:forEach items="${requestScope.employees }" var="emp">
                    <tr>
                        <td>${emp.id }</td>
                        <td>${emp.lastName }</td>
                        <td>${emp.email }</td>
                        <td>${emp.gender == 0 ? 'Female' : 'Male' }</td>
                        <td>${emp.department.departmentName }</td>
                        <td><a href="emp/${emp.id}">Edit</a></td>
                        <td><a class="delete" href="emp/${emp.id}">Delete</a></td>
                    </tr>
                </c:forEach>
            </table>
        </c:if>

        <br><br>

        <a href="emp">Add New Employee</a>
    </body>
</html>

dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 配置自定扫描的包 -->
    <context:component-scan base-package="com.xuehj.springmvc"/>

    <!-- 配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    </bean>

    <!-- 在实际开发中通常都需配置 mvc:annotation-driven 标签 -->
    <mvc:annotation-driven/>
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 配置 DispatcherServlet -->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--
	配置 org.springframework.web.filter.HiddenHttpMethodFilter: 可以把 POST 请求转为 DELETE 或 PUT 请求
	-->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

index.jsp

<%--
  Created by IntelliJ IDEA.
  User: 薛恒杰
  Date: 2018/12/24
  Time: 9:21
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
    <head>
        <title>$Title$</title>
    </head>
    <body>
        <a href="emps">List All Employees</a>
        <br><br>
    </body>
</html>