web.xml

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       SpringMVC_2
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        springDispatcherServlet
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        org.springframework.web.servlet.DispatcherServlet
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         contextConfigLocation
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         classpath:springmvc.xml
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        springDispatcherServlet
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        /
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        HiddenHttpMethodFilter
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        org.springframework.web.filter.HiddenHttpMethodFilter
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        HiddenHttpMethodFilter
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        /*
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 springmvc.xml

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 Dao层：

1 @Repository//注解于Dao层使得用于spring管理实现自动注入 2 public class EmployeeDao { 3 private static Map
     
       employees; 4 private static Integer initId =1006; 5 @Autowired 6 private  DepartmentDao departmentDao; 7 static { 8     employees = new HashMap<>(); 9     employees.put(1001, new Employee(1001, "employee_1001","1001@163.com", 1,new Department()));10     employees.put(1002, new Employee(1002, "employee_1002","1001@163.com", 0,new Department()));11     employees.put(1003, new Employee(1003, "employee_1003","1001@163.com", 1,new Department()));12     employees.put(1004, new Employee(1004, "employee_1004","1001@163.com", 0,new Department()));13     employees.put(1005, new Employee(1005, "employee_1005","1001@163.com", 1,new Department()));14 }15 public void save(Employee employee){16     if (employee.getId()==null) {17         employee.setId(initId++);18     }19     employee.setDepartment(departmentDao.getDepartment(employee.getDepartment().getId()));20     employees.put(employee.getId(), employee);21 }22 public Collection
      
        getAll(){23     return employees.values();24 }25 public  Employee get(Integer id) {26     return employees.get(id);27 }28 public void delete(Integer id) {    29     employees.remove(id);30 }31 }32
      
     

 

1 package org.springmvc.curd.entity; 2  3 public class Department { 4 private int id; 5 private String departmentName; 6 public int getId() { 7     return id; 8 } 9 public void setId(int id) {10     this.id = id;11 }12 public String getDepartmentName() {13     return departmentName;14 }15 public void setDepartmentName(String departmentName) {16     this.departmentName = departmentName;17 }18 @Override19 public String toString() {20     return "Department [id=" + id + ", departmentName=" + departmentName + "]";21 }22 public Department() {23 }24 public Department(int id, String departmentName) {25     super();26     this.id = id;27     this.departmentName = departmentName;28 }29 30 }

Controller层：

1 @Controller 2 public class EmployeeHandler { 3 @Autowired 4 private EmployeeDao employeeDao; 5 @Autowired 6 private DepartmentDao departmentDao; 7      8 @RequestMapping("emps") 9 public String list(Map
     
      map) {10     map.put("employees",employeeDao.getAll());11 return "list";    12 }13 @RequestMapping(value="addEmployee",method=RequestMethod.GET)14 public String input(Map
      
        map) {15     map.put("departments",departmentDao.getDepartments());16     map.put("employee", new Employee());17     return "input";18 }19 //@PathVariable可用于获取随url发送过来的变量 匹配到参数20 @RequestMapping(value="save", method = RequestMethod.POST)21 public String save(Employee employee) {22     employeeDao.save(employee);23     return "redirect:emps";24 }25 @RequestMapping(value="/emp/{id}",method=RequestMethod.DELETE)26 public String delete(@PathVariable("id")Integer id) {27     employeeDao.delete(id);28 return "redirect:emps";    29 }30 31 @RequestMapping("/testFileUpload")//@PathVariable可用于获取随url发送过来的变量 匹配到参数32 public String testFileUpload(@RequestParam("desc") String desc, @RequestParam("file") MultipartFile file) throws IOException {33     System.out.println("desc"+desc);34     System.out.println("OriginalFileName:"+file.getName());35     System.out.println("InputStream:"+file.getInputStream());    36     return "success";37 }38 39 40 41 }