SpringMVC_2

web.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
   <display-name>SpringMVC_2</display-name>
     <!-- The front controller of this Spring Web application, responsible for handling all application requests -->
     <servlet>
         <servlet-name>springDispatcherServlet</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <init-param>
             <param-name>contextConfigLocation</param-name>
             <param-value>classpath:springmvc.xml</param-value>
         </init-param>
         <load-on-startup>1</load-on-startup>
     </servlet>

     <!-- Map all requests to the DispatcherServlet for handling -->
     <servlet-mapping>
         <servlet-name>springDispatcherServlet</servlet-name>
         <url-pattern>/</url-pattern>
     </servlet-mapping>

      <!-- 配置HiddenHttpMethodFilter： 把post 请求转为DELETE、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>

springmvc.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-4.0.xsd
         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
 <context:component-scan base-package="org.springmvc"></context:component-scan>
 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     <property name="prefix" value="/WEB-INF/views/"></property>
     <property name="suffix" value=".jsp"></property>
 </bean>
     <mvc:default-servlet-handler/>
     <mvc:annotation-driven></mvc:annotation-driven>

 <!-- 配置multipartResolver用于表单文件上传 -->
 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
 <property name="defaultEncoding" value="UTF-8"></property>
 <property name="maxUploadSize" value="1024000"></property>
 </bean>
 </beans>

Dao层：

 @Repository//注解于Dao层使得用于spring管理实现自动注入
 public class EmployeeDao {
 private static Map<Integer, Employee> employees;
 private static Integer initId =1006;
 @Autowired
 private  DepartmentDao departmentDao;
 static {
     employees = new HashMap<>();
     employees.put(1001, new Employee(1001, "employee_1001","1001@163.com", 1,new Department()));
     employees.put(1002, new Employee(1002, "employee_1002","1001@163.com", 0,new Department()));
     employees.put(1003, new Employee(1003, "employee_1003","1001@163.com", 1,new Department()));
     employees.put(1004, new Employee(1004, "employee_1004","1001@163.com", 0,new Department()));
     employees.put(1005, new Employee(1005, "employee_1005","1001@163.com", 1,new Department()));
 }
 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);
 }
 }
  

 package org.springmvc.curd.entity;

 public class Department {
 private int id;
 private String departmentName;
 public int getId() {
     return id;
 }
 public void setId(int 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 + "]";
 }
 public Department() {
 }
 public Department(int id, String departmentName) {
     super();
     this.id = id;
     this.departmentName = departmentName;
 }

 }

Controller层：

 @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 "list";
 }
 @RequestMapping(value="addEmployee",method=RequestMethod.GET)
 public String input(Map<String,Object> map) {
     map.put("departments",departmentDao.getDepartments());
     map.put("employee", new Employee());
     return "input";
 }
 //@PathVariable可用于获取随url发送过来的变量 匹配到参数
 @RequestMapping(value="save", method = RequestMethod.POST)
 public String save(Employee employee) {
     employeeDao.save(employee);
     return "redirect:emps";
 }
 @RequestMapping(value="/emp/{id}",method=RequestMethod.DELETE)
 public String delete(@PathVariable("id")Integer id) {
     employeeDao.delete(id);
 return "redirect:emps";
 }

 @RequestMapping("/testFileUpload")//@PathVariable可用于获取随url发送过来的变量 匹配到参数
 public String testFileUpload(@RequestParam("desc") String desc, @RequestParam("file") MultipartFile file) throws IOException {
     System.out.println("desc"+desc);
     System.out.println("OriginalFileName:"+file.getName());
     System.out.println("InputStream:"+file.getInputStream());
     return "success";
 }

 }