学习大数据——SpringBoot项目整合案例
集成Spring & SpringMVC
- 基本的Spring Boot环境已经构建好了（上一篇博客），现在需要配置Spring框架及SpringMVC框架的业务环境
@ComponentScan注解
SpringBootSelfApplication.java:
package com.learn.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
/*
* @ComponentScan注解
* -用来设置自动扫描的包，如果没有指定basePackages属性，默认扫描当前类所在的包及其子包
*/
@ComponentScan(basePackages="com.learn.springboot")
@SpringBootApplication
public class SpringBootSelfApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootSelfApplication.class, args);
}
}
增加控制器代码、@Controller和@RestController区别
EmployeeHandler.java:
package com.learn.springboot.handler;
import java.util.HashMap;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.learn.springboot.entities.Department;
import com.learn.springboot.entities.Employee;
import com.learn.springboot.service.EmployeeService;
/*
* @RestController = @Controller + @ResponseBody
*/
@RestController
//@Controller
public class EmployeeHandler {
@Autowired
private EmployeeService employeeService;
// @ResponseBody
@RequestMapping("/getEmp")
public Object getEmployee() {
//常见一个map
Map<String , Object> map = new HashMap();
//调用EmployeeService获取员工信息
Employee employee = employeeService.getEmployee();
//向map中放一个Employee对象
map.put("emp", new Employee(1, "张三", "[email protected]", new Department(1001,"开发部")));
return map;
}
@RequestMapping("/getEmp2")
public Object getEmployee2() {
//常见一个map
Map<String , Object> map = new HashMap();
//调用EmployeeService获取员工信息
Employee employee = employeeService.getEmployee();
//向map中放一个Employee对象
map.put("emp",employee);
return map;
}
}
用到的实体类：
Department.java:
package com.learn.springboot.entities;
public class Department {
private Integer id;
private String name;
public Department() {
super();
}
public Department(Integer id, String name) {
super();
this.id = id;
this.name = name;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "Department [id=" + id + ", name=" + name + "]";
}
}
Employee.java:
package com.learn.springboot.entities;
public class Employee {
private Integer id;
private String lastName;
private String email;
private Department dept;
public Employee() {
super();
}
public Employee(Integer id, String lastName, String email, Department dept) {
super();
this.id = id;
this.lastName = lastName;
this.email = email;
this.dept = dept;
}
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 Department getDept() {
return dept;
}
public void setDept(Department dept) {
this.dept = dept;
}
@Override
public String toString() {
return "Employee [id=" + id + ", lastName=" + lastName + ", email=" + email + ", dept=" + dept + "]";
}
}
测试getEmp：
增加服务层代码
Service接口，ServiceImpl实现类的使用和SSM架构中的使用方式完全相同
Service接口：
package com.learn.springboot.service;
import com.learn.springboot.entities.Employee;
public interface EmployeeService {
/**
* 根据员工的id查询该员工的信息
* @return
*/
Employee getEmployee();
}
Service接口的实现：
package com.learn.springboot.service.impl;
import org.springframework.stereotype.Service;
import com.learn.springboot.entities.Department;
import com.learn.springboot.entities.Employee;
import com.learn.springboot.service.EmployeeService;
@Service
public class EmployeeServiceImpl implements EmployeeService{
@Override
public Employee getEmployee() {
return new Employee(2,"李四","[email protected]",new Department(2,"产品部"));
}
}
测试handler中的getEmp2：
