利用Spring Data MongoDB持久化文檔數據的方法教程

import java.util.Collection;
import java.util.LinkedHashSet;

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

/**
 * Spring Data MongoDB注解將Java類型映射為文檔
 */
@Document  //這是一個文檔
public class Order {

 @Id  //指定id
 private String id;
 
 @Field("client")  //覆蓋默認的域名
 private String customer;
 
 private String type;
 
 private Collection<Item> items = new LinkedHashSet<>();

 public String getId() {
  return id;
 }

 public void setId(String id) {
  this.id = id;
 }

 public String getCustomer() {
  return customer;
 }

 public void setCustomer(String customer) {
  this.customer = customer;
 }

 public String getType() {
  return type;
 }

 public void setType(String type) {
  this.type = type;
 }

 public Collection<Item> getItems() {
  return items;
 }

 public void setItems(Collection<Item> items) {
  this.items = items;
 }
 
 
 
}

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;

import com.mongodb.MongoClient;

/**
 * 
 * Spring Data MongoDB的配置
 *
 */
@Configuration
@EnableMongoRepositories(basePackages="com.adagio.db") //啟用MongoDB的Repository功能
public class MongoConfig {

 /**
  * MongoTemplate Bean
  * @param mongoDbFactory
  * @return
  */
 @Bean
 public MongoOperations mongoTemplate(){
  return new MongoTemplate(mongoDbFactory());
 }
 
 /**
  * MongoDbFactory bean
  * @return
  */
 public MongoDbFactory mongoDbFactory(){
  return new SimpleMongoDbFactory(mongoClient(), "com.adagio.db");
 }
 
 /**
  * MongoClient bean
  * @return
  */
 public MongoClient mongoClient(){
  return new MongoClient("localhost");
 }
 
}

import java.util.Arrays;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;

import com.mongodb.Mongo;
import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;

/**
 * 
 * Spring Data MongoDB的配置
 * 擴展AbstractMongoConfiguration
 *
 */
@Configuration
@EnableMongoRepositories(basePackages="com.adagio.db") //啟用MongoDB的Repository功能
public class MongoConfig2 extends AbstractMongoConfiguration {

 @Override
 protected String getDatabaseName() {
  return "OrdersDB";  //指定數據庫名
 }

 @Autowired
 private Environment env;
 
 @Override
 public Mongo mongo() throws Exception {
//  return new MongoClient();  //創建Mongo客戶端
  
  //如果MongoDB服務器運行在其他的機器上
//  return new MongoClient("mongoServer");
  
  //如果MongoDB服務器監聽的端口不是默認端口27017
//  return new MongoClient("mongoServer", 37017);
  
  //如果MongoDB服務器在生產配置上，啟用了認證功能
  MongoCredential credential = MongoCredential.createCredential(
    env.getProperty("mongo.username") , "OrdersDB", 
    env.getProperty("mongo.password").toCharArray());
  return new MongoClient(
    new ServerAddress("localhost", 37017),
    Arrays.asList(credential));
 }

 
}

//自定義查詢
 List<Order> findByCustomer(String customer);
 List<Order> getByCustomer(String customer);
 List<Order> readByCustomer(String customer);
 
 int countByCustomer(String customer);
 
 List<Order> findByCustomerLike(String customer);

 List<Order> findByCustomerAndType(String customer, String type);

 List<Order> getByType(String type);
  
 //指定查詢
 @Query("{customer:'Chuck Wagon'}")
 List<Order> findChucksOrders();

import java.util.List;

public interface OrderOperations {

 List<Order> findOrderByType(String t);
}

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;


public class OrderOperationsimpl implements OrderOperations {

 @Autowired
 private MongoOperations mongo;  //注入MongoOperations
 @Override
 public List<Order> findOrderByType(String t) {
  String type = t.equals("NET") ? "WEB" : t;
  
  //創建查詢
  Criteria where = Criteria.where("type").is(type);
  Query query = Query.query(where);
  
  //執行查詢
  return mongo.find(query, Order.class);
 }

}