学习阶段可以安装一个windows版本的mongodb，尽快把mongodb服务跑起来，让程序连上。mongodb的安装、运行、基础命令的知识，可以参考

spring mongodb 依赖版本：spring版本是4.0.9.RELEASE

    	
     
      org.springframework.data
     	
     
      spring-data-mongodb
     	
     
      1.7.2.RELEASE
     
    

spring mongodb的配置

领域对象：model实体

package com.wss.lsl.pay.demo.model;import java.io.Serializable;import org.springframework.data.annotation.Id;import org.springframework.data.annotation.Transient;import org.springframework.data.mongodb.core.index.CompoundIndex;import org.springframework.data.mongodb.core.index.CompoundIndexes;import org.springframework.data.mongodb.core.index.Indexed;import org.springframework.data.mongodb.core.mapping.DBRef;import org.springframework.data.mongodb.core.mapping.Document;import org.springframework.data.mongodb.core.mapping.Field;import com.mysema.query.annotations.QueryEntity;import com.wss.lsl.pay.demo.common.annotation.CascadeSave;// 复合索引@CompoundIndexes({ @CompoundIndex(name = "name_1_age_1", def = "{'name': 1, 'age': 1}") })@Document(collection = "user")public class User implements Serializable {	/**	 * 	 */	private static final long serialVersionUID = 1L;	@Id	private String id;	private String name;	@Field("age") // 保存在数据库的别名	private int age;	@Indexed // 单字段索引	private Integer yearOfBirth;	@Transient // 不持久化在数据库	private String password;		// getter/setter}

dao写法

package com.wss.lsl.pay.demo.dao;import java.util.List;import org.springframework.data.mongodb.repository.MongoRepository;import org.springframework.data.mongodb.repository.Query;import org.springframework.data.querydsl.QueryDslPredicateExecutor;import com.wss.lsl.pay.demo.model.User;public interface UserRepository extends MongoRepository
    
     , QueryDslPredicateExecutor
     
       {		// 根据名字查询用户列表		List
      
        findByName(String name);		// 查询名字以什么开头的用户列表		List
       
         findByNameStartingWith(String regexp);		//查询名字以什么结尾的用户列表	 	List
        
          findByNameEndingWith(String regexp);		// 查询年龄区间的用户列表	// ageLt < age < ageGt	 	List
         
           findByAgeBetween(int ageLt, int ageGt); // 查询名字包含。全模糊查询 List
          
            findByNameLike(String name); // 多条件组合查询 // 查询名字包含
           
 // 结果集按age升序排 List
           
             findByNameLikeOrderByAgeAsc(String name); // 注解方式查询。按名字查询用户 // ?0表示第一个参数 @Query("{'name': ?0}") List
            
              findUsersByName(String name); // 根据用户名字的正则表达式查询$regex @Query("{'name':{$regex: ?0}}") List
             
               findUsersByRegexpName(String regexp); // 根据年龄区间查询 @Query("{'age':{$gt:?0, $lt: ?1}}") List
              
                findUsersByAgeBetween(int ageGT, int ageLT); }
              
             
            
           
          
         
        
       
      
     
    

单元测试

package com.wss.lsl.pay.demo.dao;import java.util.List;import org.junit.After;import org.junit.Assert;import org.junit.Before;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.data.domain.Page;import org.springframework.data.domain.PageRequest;import org.springframework.data.domain.Pageable;import org.springframework.data.domain.Sort.Direction;import org.springframework.data.mongodb.core.MongoTemplate;import org.springframework.data.mongodb.core.index.Index;import org.springframework.data.mongodb.core.query.Criteria;import org.springframework.data.mongodb.core.query.Query;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import com.mysema.query.types.Predicate;import com.wss.lsl.pay.demo.model.Card;import com.wss.lsl.pay.demo.model.QUser;import com.wss.lsl.pay.demo.model.User;@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations={"classpath:/META-INF/spring/applicationContext.xml"})public class UserRepositoryTest {	@Autowired	private UserRepository userRepository;	@Autowired	private MongoTemplate mongoTemplate;	@Before	public void setUp() {		userRepository.deleteAll(); // 清空数据，为测试用例准备前提条件	}	@After	public void after() {	}	private void saveUser(String name, int age) {		User user = new User(name, age);		userRepository.insert(user);	}	private User getLongNameUser() {		return new User("张三32323rtyuioghjklsadas范德", 20);	}	// 测试插入	@Test	public void testInsert() throws InterruptedException {		int count = 100;		for (int i = 0; i < count; i++) {			User user = getLongNameUser();			userRepository.insert(user);		}		// 校验插入的数据数量		long totalCount = userRepository.count();		Assert.assertEquals(count, totalCount);	}	// 测试查询	@Test	public void testQuery() {		User user = new User("张三", 20);		userRepository.insert(user);		user = new User("李四", 20);		userRepository.insert(user);		// page 从0开始		Pageable page = new PageRequest(0, 2, Direction.ASC, "name");		Page
    
      list = userRepository.findAll(page);		List
     
       users = list.getContent();		User zhangsan = users.get(0);		User lisi = users.get(1);		Assert.assertEquals("张三", zhangsan.getName());		Assert.assertEquals("李四", lisi.getName());		// 按名字查询		Query query = new Query();		query.addCriteria(Criteria.where("name").is("张三"));		users = mongoTemplate.find(query, User.class);		Assert.assertEquals(1, users.size());		query = new Query();		query.addCriteria(Criteria.where("name").is("李四"));		users = mongoTemplate.find(query, User.class);		Assert.assertEquals(1, users.size());	}	// 测试更新	@Test	public void testUpdate() {		long count = userRepository.count();		Assert.assertEquals(0, count);		User user = new User("张三", 20);		userRepository.save(user); // 没有先插入		// 校验		count = userRepository.count();		Assert.assertEquals(1, count);		user = userRepository.findOne(user.getId());		Assert.assertEquals("张三", user.getName());		// 更新操作		user.setName("张三2");		userRepository.save(user);		// 校验		count = userRepository.count();		Assert.assertEquals(1, count);		user = userRepository.findOne(user.getId());		Assert.assertEquals("张三2", user.getName());	}	// 测试删除操作	@Test	public void testDelete() {		User user = new User("张三", 20);		userRepository.insert(user);		user = new User("李四", 30);		userRepository.insert(user);		// 删除了“李四”		mongoTemplate.remove(user, "user");		// 校验只有“张三”		List
      
        users = mongoTemplate.findAll(User.class);		Assert.assertEquals(1, users.size());		Assert.assertEquals("张三", users.get(0).getName());	}	// 测试between查询	@Test	public void testBetween() {		saveUser("张三", 20);		saveUser("李四", 25);		saveUser("王五", 31);		List
       
         users = userRepository.findByAgeBetween(20, 30);		Assert.assertEquals(1, users.size());		Assert.assertEquals("李四", users.get(0).getName());	}	// 测试like	@Test	public void testLike() {		saveUser("三张", 20);		saveUser("李五四三", 30);		saveUser("王三五", 31);		List
        
          users = userRepository.findByNameLike("三");		Assert.assertEquals(3, users.size());		for (User user : users) {			Assert.assertTrue(user.getName().contains("三"));		}	}	// 测试排序：按年龄排序	@Test	public void testSort() {		saveUser("三张", 20);		saveUser("王三五", 31);		saveUser("李五四三", 30);		saveUser("李五四三", 10);		saveUser("李五四三", 30);		List
         
           users = userRepository.findByNameLikeOrderByAgeAsc("三"); Assert.assertEquals(5, users.size()); Assert.assertEquals(10, users.get(0).getAge()); Assert.assertEquals(20, users.get(1).getAge()); Assert.assertEquals(30, users.get(2).getAge()); Assert.assertEquals(30, users.get(3).getAge()); Assert.assertEquals(31, users.get(4).getAge()); } }