第十一章 springboot + mongodb（简单查询）

package com.xxx.firstboot.domain;

import org.springframework.data.annotation.Id;

/**
 * 测试mongodb
 */
public class Customer {
    /**
     * cid：该字段用于mongodb的"_id"索引
     * 1、需要@Id注解
     * 2、取名无所谓，反正在mongodb中最后都会转化为"_id"
     * 3、定义为String类型，如果定义为Integer可能索引只会是0，会出现key重复导致数据库插不进去的情况；
     * 4、该类型也是MongoRepository泛型中主键的ID
     */
    @Id
    private String cid;
    private String firstname;
    private String secondname;

    public String getCid() {
        return cid;
    }

    public void setCid(String cid) {
        this.cid = cid;
    }

    public String getFirstname() {
        return firstname;
    }

    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }

    public String getSecondname() {
        return secondname;
    }

    public void setSecondname(String secondname) {
        this.secondname = secondname;
    }

}

package com.xxx.firstboot.mongo;

import java.util.List;

import org.springframework.data.mongodb.repository.MongoRepository;

import com.xxx.firstboot.domain.Customer;

/**
 * MongoRepository<Customer, Integer>
 * 第一个参数：T 操作的vo
 * 第二个参数：ID T的主键类型
 * 作用：该接口实现了CRUD方法
 * 
 * 注意：
 * 1、由于boot使用了spring-data-mongodb，所以我们不需要写该接口的实现，
 *   当我们运行程序的时候，spring-data-mongodb会动态创建
 * 2、findBySecondname命名是有讲究的，Secondname（是Customer的属性）若改为lastname就会报找不到属性lastname的错误
 */
public interface CustomerRepository extends MongoRepository<Customer, String> {
    public Customer findByFirstname(String firstname);
    public List<Customer> findBySecondname(String secondname);
}

package com.xxx.firstboot.web;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.xxx.firstboot.domain.Customer;
import com.xxx.firstboot.mongo.CustomerRepository;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;

@RestController
@RequestMapping("/customer")
@Api("customer相关的API，用于测试mongodb")
public class CustomerController {

    @Autowired
    private CustomerRepository customerRepository;

    @ApiOperation("增加一个Customer")
    @RequestMapping(value = "/addCustomer", method = RequestMethod.GET)
    public Customer addCustomer(@RequestParam("firstname") String firstname,
                                @RequestParam("secondname") String secondname) {
        Customer customer = new Customer();
        customer.setFirstname(firstname);
        customer.setSecondname(secondname);
        return customerRepository.save(customer);
    }

    @ApiOperation("获取所有的Customer")
    @RequestMapping(value = "/getAllCustomer", method = RequestMethod.GET)
    public List<Customer> getAllCustomer() {
        return customerRepository.findAll();
    }

    @ApiOperation("根据firstname获取Customer")
    @RequestMapping(value = "/getCustomerByFirstname", method = RequestMethod.GET)
    public Customer getCustomerByFirstname(@RequestParam("firstname") String firstname) {
        return customerRepository.findByFirstname(firstname);
    }

    @ApiOperation("根据secondname获取多个Customer")
    @RequestMapping(value = "/getCustomerBySecondname", method = RequestMethod.GET)
    public List<Customer> getCustomerBySecondname(@RequestParam("secondname") String secondname) {
        return customerRepository.findBySecondname(secondname);
    }

    @ApiOperation("根据id删除Customer")
    @RequestMapping(value = "/deleteCustomerById", method = RequestMethod.GET)
    public boolean deleteCustomerById(@RequestParam("cid") String cid) {
        customerRepository.delete(cid);
        return true;
    }
}