在上一节 MongoTemplate 中，继续添加下面代码。

			
package api;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@SpringBootApplication
@EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class })
@ComponentScan({ "api.web", "api.rest","api.service" })
@EnableMongoRepositories
public class Application {
	
	
    public @Bean WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/**");
            }
        };
    }
	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

}
			
		

Resource: src/main/resources/application.properties

			
spring.data.mongodb.uri=mongodb://finance:XQ8os82I0pFoZBMd4@mdb.netkiller.cn/finance
spring.data.mongodb.repositories.enabled=true
			
		

CityRepository.java

			
package repository;

import java.util.List;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.mongodb.repository.MongoRepository;

import domain.City;

public interface CityRepository extends MongoRepository<City, String> {
	public Page<City> findAll(Pageable pageable);

	public City findByNameAndCountry(String name, String country);

	public City findByName(String name);

	public List<City> findByCountry(String country);

}
			
		

City.java

			
package domain;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "city")
public class City {
	
	@Id
    private String id;
	public String name;
	public String country;
	
	public City(String name, String country){
		this.setName(name);
		this.setCountry(country);
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getCountry() {
		return country;
	}
	public void setCountry(String country) {
		this.country = country;
	}
	@Override
	public String toString() {
		return "City [id=" + id + ", name=" + name + ", country=" + country + "]";
	}
	
}
			
		

在 IndexController 中调用 CityRepository

			
package web;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import repository.CityRepository;

import domain.City;
import repository.CityRepository;

@Controller
public class IndexController {
	
	@Autowired
	private CityRepository repository;
	
	@RequestMapping("/index")
	@ResponseBody
	public ModelAndView index() {
		String message = "Hello";
		return new ModelAndView("home/welcome", "variable", message);
	}
	
	@RequestMapping("/curd")
	@ResponseBody
	public String curd() {

		repository.deleteAll();

		// save a couple of city
		repository.save(new City("Shenzhen", "China"));
		repository.save(new City("Beijing", "China"));

		System.out.println("--------------------------------");
		// fetch all city
		for (City city : repository.findAll()) {
			System.out.println(city);
		}
		// fetch an individual city
		System.out.println("--------------------------------");
		System.out.println(repository.findByName("Shenzhen"));
		System.out.println("--------------------------------");
		for (City city : repository.findByCountry("China")) {
			System.out.println(city);
		}

		String message = "Hello";
		return message;
	}
}