springMVC: RestFul案例3

主要用于展示最后的代码。项目结构如下：

1. web.xml

    
    
        CharacterEncodingFilter
        org.springframework.web.filter.CharacterEncodingFilter
        
            encoding
            UTF-8
        
        
            forceResponseEncoding
            true
        
    
    
        CharacterEncodingFilter
        /*
    


    
    
        HiddenHttpMethodFilter
        org.springframework.web.filter.HiddenHttpMethodFilter
    
    
        HiddenHttpMethodFilter
        /*
    


    
    
        DispatcherServlet
        org.springframework.web.servlet.DispatcherServlet
        
        
        
            
            contextConfigLocation
            
            classpath:springMVC.xml
        
        
        1
    
    
        DispatcherServlet
        
        
        /
    

2. springMVC.xml

3. com.atguigu.rest下的java类

(1) bean - Employee

package com.atguigu.rest.bean;

public class Employee {
    private Integer id;
    private String lastName;
    private String email;
    //1 male, 0 female
    private Integer gender;

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

    public Employee() {
    }
}

(2) control - EmployeeControl

package com.atguigu.rest.controller;

import com.atguigu.rest.bean.Employee;
import com.atguigu.rest.dao.EmployeeDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.util.Collection;

@Controller
public class EmployeeController {
    @Autowired
    //自动装配：默认根据ByType，其次ByName。在IOC容器的范围内找到一个Bean来赋值
    //通过注解 + 扫描，IOC容器中就包含了EmployeeDao这个Bean，从而进行自动装配
    private EmployeeDao employeeDao;

    @RequestMapping(value="/employee", method = RequestMethod.GET)
    public String getAllEmployee(Model model){
        Collection employeeList = employeeDao.getAll();
        //利用model向request域对象共享数据
        model.addAttribute("employeeList", employeeList);
        return "employee_list";
    }

    //这里由于有传进来的参数，因此在/employee后面需要有占位符{}来存储
    //然后利用@PathVariable注解，将占位符所表示的值与控制器函数内的形参进行绑定
    @RequestMapping(value = "/employee/{id}", method = RequestMethod.DELETE)
    public String deleteEmployee(@PathVariable("id") Integer id){
        employeeDao.delete(id);
        return "redirect:/employee";
        //在删除结束后，回到展示表单的页面。先进入上一个控制器方法获取全部的志愿信息，让它再去展示表单
        //这里不采用转发，而是重定向。因为删除成功后，和之前的请求就没有关系了。
        //如果用转发，则地址栏中的地址还是现在的地址：/employee/{id}
        //重定向之后，地址栏中就会显示：/employee。相当于咱们自己在地址栏中输入了个地址去访问，默认为get请求
    }

    @RequestMapping(value = "/employee", method = RequestMethod.POST)
    public String addEmployee(Employee employee){
        //存储得到的Employee对象
        employeeDao.save(employee);
        return  "redirect:/employee";
    }

    @RequestMapping(value = "/employee/{id}", method = RequestMethod.GET)
    //由于需要将查询出的数据在请求域中共享，因此参数中有个model
    public String getEmployeeById(@PathVariable("id") Integer id, Model model){
        Employee employee = employeeDao.get(id);
        model.addAttribute("employee",employee);
        return "employee_update";
    }

    @RequestMapping(value = "/employee", method = RequestMethod.PUT)
    public String updateEmployee(Employee employee){
        employeeDao.save(employee);
        return "redirect:/employee";
    }
}

(3) dao - EmployeeDao

package com.atguigu.rest.dao;

import com.atguigu.rest.bean.Employee;
import org.springframework.stereotype.Repository;

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

// Dao: 数据访问接口
// @Repository持久层注解
@Repository
public class EmployeeDao {
    private static Map employees = null;

    static {
        employees = new HashMap();
        employees.put(1001, new Employee(1001, "E-AA", "[email protected]", 1));
        employees.put(1002, new Employee(1002, "E-BB", "[email protected]", 1));
        employees.put(1003, new Employee(1003, "E-CC", "[email protected]", 0));
        employees.put(1004, new Employee(1004, "E-DD", "[email protected]", 0));
        employees.put(1005, new Employee(1005, "E-EE", "[email protected]", 1));
    }

    private static Integer initId = 1006;

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

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

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

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

4. html

(1) employee_add.html

    
    



    lastName:

    email:

    gender:male

           fmale

    

(2) employee_list.html

    
    


    

        

            
            
Employee Info
        
        

            
id
            
lastname
            
email
            
gender
            
options(add)
        
        
        

            

            

            

            

            

                
                    delete
                
                update
            
        
    

    
    

        
    

    
    

(3) employee_update.html

    
    



    
    
    
    
    lastName:

    email:

    gender:male

    fmale

    

(4) index.html

    
    



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