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";
}



}