一、RESTful案例之准备工作：

和传统CRUD一样，实现对员工信息的增删改查

我们所在的环境为SpringMVC(六）RESTful-CSDN博客

在此环境上我们进行创建实体类（创建pojo包下面的Employee类）：

package com.rgf.pojo;public class Employee {private  Integer id;private  String LastName;private  String email;//1 male,0 femaleprivate  Integer gender;public Employee() {}public Employee(Integer id, String lastName, String email, Integer gender) {this.id = id;LastName = lastName;this.email = email;this.gender = gender;}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getLastName() {return LastName;}public void setLastName(String lastName) {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;}@Overridepublic String toString() {return "Employee{" +"id=" + id +", LastName='" + LastName + '\'' +", email='" + email + '\'' +", gender=" + gender +'}';}
}

 之后我们创建dao层里面的实现类EmployeeDao,java：

package com.rgf.dao;import com.rgf.pojo.Employee;
import org.springframework.stereotype.Repository;import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
@Repository
public class EmployeeDao {private  static Map<Integer, Employee>employees =null;static {employees=new HashMap<Integer,Employee>();employees.put(1001,new Employee(1001,"E-AA","aa@163.com",1));employees.put(1002,new Employee(1002,"E-BB","bb@163.com",1));employees.put(1003,new Employee(1003,"E-CC","cc@163.com",0));employees.put(1004,new Employee(1004,"E-DD","dd@163.com",0));employees.put(1005,new Employee(1005,"E-EE","ee@163.com",1));}private static Integer initId=1006;public  void save(Employee employee){//i++,先赋值，再自增if(employee.getId()==null){employee.setId(initId++);}employees.put(employee.getId(),employee);//如果此时员工id为null,则为添加功能；如果员工id不为null,则为修改功能。}public Collection<Employee> getAll(){return  employees.values();}public  Employee get(Integer id){return  employees.get(id);}public void  delete(Integer id){employees.remove(id);}
}

 之后我们创建controller层里面的实现类EmployeeController.java:

package com.rgf.controller;import com.rgf.pojo.Employee;
import org.springframework.stereotype.Controller;/*** 查询所有的员工信息-->/employee-->get* 跳转到添加页面-->to/Add/-->get* 新增员工信息-->/employee-->post* 跳转到修改页面-->/employee/1-->get* 修改员工信息-->/employee-->put* 删除员工信息-->/employee/1-->delete*/
@Controller
public class EmployeeController {}

二、RESTful案例之列表功能： 

我们首先进行实现列表功能：

我们的配置环境如下所示：

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/c"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/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd"><!--扫描控制层组件--><context:component-scan base-package="spring_mvc_rest.src.main.java.com.rgf"></context:component-scan><!--配置Thymeleaf视图解析器--><bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver"><property name="order" value="1"/><property name="characterEncoding" value="UTF-8"/><property name="templateEngine"><!--模板引擎--><bean class="org.thymeleaf.spring5.SpringTemplateEngine"><property name="templateResolver"><!--模板解析器--><bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver"><!--/WEB-INF/templates/index.html--><!--视图前缀+逻辑视图+视图后缀就是我们完整的物理视图，即访问index.html，不用完整路径，即index即可进行访问--><!--视图前缀--><property name="prefix" value="/WEB-INF/templates/"/><!--视图后缀--><property name="suffix" value=".html"/><property name="templateMode" value="HTML5"/><property name="characterEncoding" value="UTF-8" /></bean></property></bean></property></bean><!--开启mvc的注解驱动--><mvc:annotation-driven/><!--配置视图控制器--><mvc:view-controller path="/" view-name="index"></mvc:view-controller>
</beans>

 pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/P