此文基于Spring的MongoTemplate，介绍MongoDB比较基础常用的增删改查操作。涵盖了从集合创建、索引创建和CRUD操作到更高级的功能(如Map-Reduce和聚合)等等。不多说，直接上代码。
模拟基础数据
Person dave, oliver, carter;
@Autowired
private MongoOperations mongoOps;
Collation en;
@Before
public void setUp() {
// 排序规则需要一个用于创建的区域设置。中文排序使用：zh
en = Collation.of("en")
// 排序规则强度定义表示字符之间差异的比较级别。
// 根据所选的强度，可以配置各种选项(区分大小写、大小写排序等)。
.strength(Collation.ComparisonLevel.secondary().includeCase())
// 指定是将数字字符串比较为数字还是字符串。
.numericOrderingEnabled()
// 为了便于比较，指定排序规则是否应将空格和标点符号视为基本字符。
.alternate(Collation.Alternate.shifted().punct())
// 指定带有变音符号的字符串是否从字符串的后面排序，例如使用英语字典排序。
.forwardDiacriticSort()
// 指定是否检查文本是否需要规范化以及是否执行规范化。
.normalizationEnabled();
// 排序可用于创建集合和索引。如果您创建了一个指定排序规则的集合，则排序规则将应用于索引创建和查询
mongoOps.createCollection(Person.class, CollectionOptions.just(en));
mongoOps.indexOps(Person.class).ensureIndex(new Index("firstname", Sort.Direction.ASC).collation(en));
dave = mongoOps.insert(new Person("Dave", "Matthews"));
oliver = mongoOps.insert(new Person("Oliver August", "Matthews"));
carter = mongoOps.insert(new Person("Carter", "Beauford"));
}
@After
public void destory(){
mongoOps.dropCollection(Person.class);
}
新增操作
/**
* 存在同ID更新；不存在ID新增。
*/
@Test(expected = DuplicateKeyException.class)
public void testSave(){
Person person = new Person("Dave", "Dreamson");
person.setId(dave.getId());
// 使用save，如果是相同ID，则更新相应的记录
final Person dave = mongoOps.save(person);
Assert.assertEquals("Dreamson",dave.getLastname());
// 使用insert，如果是相同ID，抛出DuplicateKeyException
mongoOps.insert(person);
}
/**
* 批量新增
*/
@Test
public void testInsertAll(){
mongoOps.insertAll(Lists.newArrayList(
new Person("Dave", "Matthews"),
new Person("Oliver August", "Matthews"),
new Person("Carter", "Beauford")
));
final List all = mongoOps.findAll(Person.class);
Assert.assertEquals(6,all.size());
}
更新操作
/**
* 更新第一条记录
*/
@Test
public void testUpdateFirst(){
final UpdateResult updateResult = mongoOps.updateFirst(Query.query(Criteria.where("firstname").is("Carter")),
Update.update("lastname", "Dreamson"), Person.class);
System.out.println(updateResult);
Person carter = mongoOps.findOne(Query.query(Criteria.where("firstname").is("Carter")), Person.class);
Assert.assertEquals("Dreamson",carter.getLastname());
}
/**
* 批量更新
*/
@Test
public void testBatchUpdate(){
mongoOps.updateMulti(new Query(Criteria.where("age").exists(false)),
new Update().inc("age", 50), Person.class);
mongoOps.findAll(Person.class).forEach(person->
Assert.assertEquals(50,person.getAge().longValue())
);
}
/**
* 存在更新，不存在新增
*/
@Test
public void testUpsert(){
final UpdateResult updateResult = mongoOps.upsert(Query.query(Criteria.where("firstname").is("xiaoming").and("lastname").is("Joe"))
, Update.update("age", 3), Person.class);
System.out.println(updateResult);
final Person xiaoming = mongoOps.findOne(Query.query(Criteria.where("firstname").is("xiaoming")), Person.class);
Assert.assertEquals(xiaoming.getLastname(),"Joe");
Assert.assertEquals(xiaoming.getAge().longValue(),3);
}
/**
* 找到记录并更新，没找到返回NULL
*/
@Test
public void testFindAndModify(){
Query query = new Query(Criteria.where("firstname").is("Dave"));
Update update = new Update().inc("age", 1);
Person p = mongoOps.findAndModify(query, update, Person.class); // 返回旧对象
if(Optional.ofNullable(p).isPresent()){
Assert.assertEquals(p.getFirstname(), "Dave");
Assert.assertEquals(p.getAge(), null);
p = mongoOps.findOne(query, Person.class);
Assert.assertEquals(p.getAge().longValue(), 1);
p = mongoOps.findAndModify(query, update, new FindAndModifyOptions().returnNew(true), Person.class); // 返回新对象
Assert.assertEquals(p.getAge().longValue(), 2);
}else{
System.out.println("没找到相应的记录！");
}
}
/**
* 查找并替换，返回旧记录
*/
@Test
public void testFindAndReplace(){
Optional result = mongoOps.update(Person.class)
.matching(Query.query(Criteria.where("firstname").is("Dave")))
.replaceWith(new Person("Dick","what's up!"))
.withOptions(FindAndReplaceOptions.options().upsert())
.as(Person.class)
.findAndReplace();
Assert.assertEquals("Dave", result.get().getFirstname());
final Person dick = mongoOps.findById(result.get().getId(), Person.class);
Assert.assertEquals("Dick", dick.getFirstname());
}
删除操作
/**
* 删除对象
*/
@Test
public void testRemove(){
// 批量删除
final DeleteResult deleteResult = mongoOps.remove(
Query.query(Criteria.where("firstname").is("Oliver August")), Person.class);
System.out.println(deleteResult);
Assert.assertEquals(2,mongoOps.findAll(Person.class).size());
mongoOps.remove(dave);
Assert.assertEquals(1,mongoOps.findAll(Person.class).size());
// 批量逐个删除
mongoOps.findAllAndRemove(
Query.query(Criteria.where("firstname").is("Carter")), Person.class);
Assert.assertEquals(0,mongoOps.findAll(Person.class).size());
}
乐观锁处理
/**
* 乐观锁，version版本自增。
* 如果更新时version<=原记录version，则抛出异常
*/
@Test(expected = OptimisticLockingFailureException.class)
public void testOptimisticLocking(){
Person daenerys = mongoOps.insert(new Person("Daenerys","ABC"));
Person tmp = mongoOps.findOne(Query.query(Criteria.where("id").is(daenerys.getId())), Person.class);
daenerys.setAge(100);
mongoOps.save(daenerys);
mongoOps.save(tmp);
}
查询操作
/**
* 通过id查询记录
*/
@Test
public void testFindById(){
Person dave = mongoOps.findOne(Query.query(Criteria.where("firstname").is("Dave")), Person.class);
dave = mongoOps.findById(dave.getId(), Person.class);
Assert.assertEquals(this.dave,dave);
}
/**
* 查询所有
*/
@Test
public void testFindAll(){
final List all = mongoOps.findAll(Person.class);
Assert.assertEquals(all.size(),3);
Assert.assertTrue(all.containsAll(Lists.newArrayList(dave,oliver,carter)));
}
/**
* 查询一条记录
*/
@Test
public void testFindOne(){
Person dave = mongoOps.findOne(Query.query(Criteria.where("firstname").is("Dave")), Person.class);
Assert.assertEquals("Matthews",dave.getLastname());
}
/**
* 通过JSON的方式查询
*/
@Test
public void testBasicQuery(){
BasicQuery query = new BasicQuery("{ firstname : { $in : ['Dave','Carter'] }, lastname : { $eq : 'Beauford' }}");
List result = mongoOps.find(query, Person.class);
Assert.assertEquals(1,result.size());
Assert.assertEquals("Carter",result.get(0).getFirstname());
}
/**
* 为单个字段获取不同的值
*/
@Test
public void testDistinct(){
List lastname = mongoOps.query(Person.class)
.distinct("lastname")
.as(String.class)
.all();
lastname.forEach(System.out::println);
Assert.assertTrue(lastname.containsAll(Lists.newArrayList("Matthews","Beauford")));
}
/**
* 集合排序操作
*/
@Test
public void testCollations(){
// 使用collation的find查询
Query query = new Query(Criteria.where("lastname").is("Matthews")).collation(en);
List results = mongoOps.find(query, Person.class);
System.out.println(results);
Assert.assertEquals(results.get(0).getFirstname(),"Dave");
// 使用collation的aggregation查询
// newAggregation().withOptions(AggregationOptions.builder().collation(collation).build());
}
GEO查询操作
1、新建初始化脚本starbucks-in-nyc.json
[
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"16628",
"name":"26th & Broadway",
"street":"1140 Broadway",
"city":"New York",
"location" : { "latitude":40.743827, "longitude":-73.989015 }
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7427",
"name":"29th & Park-Park Ave. South",
"street":"424 Park Avenue South",
"city":"New York",
"location" : { "latitude":4.074426, "longitude":-73.983749}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7263",
"name":"43rd & 8th",
"street":"684 Eighth Avenue",
"city":"New York",
"location" : { "latitude":40.758001, "longitude":-73.988994}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7215",
"name":"1585 Broadway (47th)",
"street":"1585 Broadway",
"city":"New York",
"location" : { "latitude":40.759686, "longitude":-73.985235}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7393",
"name":"49th & 8th-World Wide Plaza",
"street":"325 W 49th St",
"city":"New York",
"location" : { "latitude":40.762176, "longitude":-73.987472}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7316",
"name":"31st & 7th",
"street":"370 7th Avenue",
"city":"New York",
"location" : { "latitude":40.74899, "longitude":-73.992372}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7540",
"name":"17th and Broadway (41 Union Square",
"street":"41 Union Square West",
"city":"New York",
"location" : { "latitude":40.737035, "longitude":-73.990558}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7611",
"name":"40th & Lexington (360 Lex)",
"street":"360 Lexington Avenue",
"city":"New York",
"location" : { "latitude":40.750332, "longitude":-73.977043}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"15461",
"name":"Jackson Square at Greenwich Ave",
"street":"122 Greenwich Avenue, (space A)",
"city":"New York",
"location" : { "latitude":40.738441, "longitude":-74.002217}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"852",
"name":"1656 Broadway",
"street":"1656 Broadway",
"city":"New York",
"location" : { "latitude":40.762092, "longitude":-73.983345}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"11738",
"name":"63rd & Broadway",
"street":"1889 Broadway",
"city":"New York",
"location" : { "latitude":40.771365, "longitude":-73.982591}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"817",
"name":"1st Avenue & 75th St.",
"street":"1445 First Avenue",
"city":"New York",
"location" : { "latitude":40.770031, "longitude":-73.954631}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"839",
"name":"Broadway @ 81st",
"street":"2252 Broadway",
"city":"New York",
"location" : { "latitude":40.784905, "longitude":-73.978696}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7378",
"name":"Union Square",
"street":"10 UNION SQUARE EAST",
"city":"New York",
"location" : { "latitude":40.735022, "longitude":-73.989848}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7547",
"name":"Sheridan Square (72 Grove Street)",
"street":"72 Grove Street",
"city":"New York",
"location" : { "latitude":40.73311, "longitude":-74.002707}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7216",
"name":"87th & Lexington",
"street":"120 EAST 87TH ST",
"city":"New York",
"location" : { "latitude":40.780139, "longitude":-73.955346}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7352",
"name":"86th & Columbus",
"street":"540 Columbus Avenue",
"city":"New York",
"location" : { "latitude":40.786704, "longitude":-73.972244}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7346",
"name":"SONY",
"street":"550 Madison Avenue, #A32",
"city":"New York",
"location" : { "latitude":40.761478, "longitude":-73.973501}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7317",
"name":"73rd & Columbus",
"street":"267-275 Columbus Ave",
"city":"New York",
"location" : { "latitude":40.777949, "longitude":-73.978175}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"14091",
"name":"Macy's 5th Floor - Herald Square",
"street":"151 W. 34th Street",
"city":"New York",
"location" : { "latitude":40.751148, "longitude":-73.990061}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7525",
"name":"135 E 57 Street (New World)",
"street":"135 East 57th Street",
"city":"New York",
"location" : { "latitude":40.760965, "longitude":-73.96921}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7608",
"name":"48th & Lexington",
"street":"511 Lexington Avenue",
"city":"New York",
"location" : { "latitude":40.755021, "longitude":-73.973223}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"75589",
"name":"Marriott Marquis-Lobby",
"street":"1535 Broadway",
"city":"New York",
"location" : { "latitude":40.757993, "longitude":-73.985633}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7373",
"name":"Grand Central Station",
"street":"107 E 43rd St, Space MC-72",
"city":"New York",
"location" : { "latitude":40.753291, "longitude":-73.977635}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"75847",
"name":"Hilton New York Marketplace",
"street":"1335 Avenue of the Americas",
"city":"New York",
"location" : { "latitude":40.762304, "longitude":-73.979184}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7342",
"name":"41st & 3rd",
"street":"639 3rd Avenue",
"city":"New York",
"location" : { "latitude":40.750195, "longitude":-73.974565}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"9241",
"name":"Park Avenue Plaza",
"street":"55 E 53rd St",
"city":"New York",
"location" : { "latitude":40.759285, "longitude":-73.973516}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7860",
"name":"Trump Tower",
"street":"725 5th Avenue",
"city":"New York",
"location" : { "latitude":40.762555, "longitude":-73.974236}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"16576",
"name":"36th St & Sixth Avenue",
"street":"977 Avenue of the Americas",
"city":"New York",
"location" : { "latitude":40.751005, "longitude":-73.986913}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"14441",
"name":"118th & Frederick Douglas Blvd.",
"street":"2195 Frederick Douglas Boulevard",
"city":"New York",
"location" : { "latitude":40.805915, "longitude":-73.954495}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"5114",
"name":"96th & Lexington Ave",
"street":"1491 Lexington Avenue",
"city":"New York",
"location" : { "latitude":40.785886, "longitude":-73.950919}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"15685",
"name":"69th & First",
"street":"1281 First Avenue",
"city":"New York",
"location" : { "latitude":40.765864, "longitude":-73.957431}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"10751",
"name":"Roosevelt Island",
"street":"455 Main Street",
"city":"New York",
"location" : { "latitude":40.759326, "longitude":-73.95289}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"10608",
"name":"Third & 60th",
"street":"1021 Third Avenue",
"city":"New York",
"location" : { "latitude":40.762394, "longitude":-73.965745}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"10693",
"name":"Bloomberg Building",
"street":"731 Lexington Avenue",
"city":"New York",
"location" : { "latitude":40.761401, "longitude":-73.967862}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7404",
"name":"57th & Lexington",
"street":"116 E. 57th Street",
"city":"New York",
"location" : { "latitude":40.761088, "longitude":-73.969984}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"10841",
"name":"55th & Lexington",
"street":"655 Lexington Avenue",
"city":"New York",
"location" : { "latitude":40.759446, "longitude":-73.969979}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7655",
"name":"53rd & Lexington",
"street":"630 Lexington Ave",
"city":"New York",
"location" : { "latitude":40.758743, "longitude":-73.97094}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7761",
"name":"52nd & Lexington",
"street":"599 Lexington",
"city":"New York",
"location" : { "latitude":40.757616, "longitude":-73.970857}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7802",
"name":"50th & Lexington",
"street":"560 Lexington Avenue",
"city":"New York",
"location" : { "latitude":40.756861, "longitude":-73.972635}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7370",
"name":"48th & 3rd",
"street":"757 Third Avenue",
"city":"New York",
"location" : { "latitude":40.754122, "longitude":-73.971714}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7670",
"name":"Worldwide Plaza II",
"street":"825 Eighth Avenue, W-9",
"city":"New York",
"location" : { "latitude":40.762228, "longitude":-73.986567}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"9242",
"name":"450 Lexington Ave.",
"street":"450 Lexington Avenue",
"city":"New York",
"location" : { "latitude":40.753176, "longitude":-73.974975}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7426",
"name":"575 Fifth Avenue",
"street":"575 Fifth Avenue",
"city":"New York",
"location" : { "latitude":40.756131, "longitude":-73.978922}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"14241",
"name":"NHL store @ 47th & 6th",
"street":"1185 Avenue of the Americas",
"city":"New York",
"location" : { "latitude":40.758048, "longitude":-73.982192}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7462",
"name":"545 Fifth Ave.",
"street":"545 Fifth Ave.",
"city":"New York",
"location" : { "latitude":40.755168, "longitude":-73.979409}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7297",
"name":"45th St. & Sixth Ave.",
"street":"1166 Avenue of the Americas",
"city":"New York",
"location" : { "latitude":40.756649, "longitude":-73.982141}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"11737",
"name":"Madison & 44th",
"street":"340 Madison Avenue",
"city":"New York",
"location" : { "latitude":40.753944, "longitude":-73.978759}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"9244",
"name":"335 Madison Ave.",
"street":"335 Madison Avenue",
"city":"New York",
"location" : { "latitude":40.753887, "longitude":-73.978719}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7506",
"name":"150 E. 42nd Street",
"street":"150 E. 42nd Street",
"city":"New York",
"location" : { "latitude":40.751238, "longitude":-73.975608}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7222",
"name":"330 Madison",
"street":"330 Madison Ave",
"city":"New York",
"location" : { "latitude":40.753335, "longitude":-73.979405}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7898",
"name":"42nd & Park",
"street":"125 Park Ave",
"city":"New York",
"location" : { "latitude":40.751779, "longitude":-73.977735}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"8993",
"name":"45th & Broadway",
"street":"1530 Broadway",
"city":"New York",
"location" : { "latitude":40.757662, "longitude":-73.985721}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"15440",
"name":"43rd & Sixth",
"street":"1101 - 1109 Avenue of the Americas",
"city":"New York",
"location" : { "latitude":40.755352, "longitude":-73.983972}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7801",
"name":"41st & Madison",
"street":"295 Madison Avenue",
"city":"New York",
"location" : { "latitude":40.751957, "longitude":-73.979722}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"11764",
"name":"Empire State Building",
"street":"350 Fifth Avenue",
"city":"New York",
"location" : { "latitude":40.74866, "longitude":-73.985614}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"8769",
"name":"West 43rd and Broadway",
"street":"1500 Broadway",
"city":"New York",
"location" : { "latitude":40.756643, "longitude":-73.985904}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7273",
"name":"42nd & 6th",
"street":"1100 Avenue of the Americas",
"city":"New York",
"location" : { "latitude":40.754883, "longitude":-73.984074}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"8812",
"name":"39th & Park",
"street":"90 Park Ave",
"city":"New York",
"location" : { "latitude":40.750628, "longitude":-73.979265}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7890",
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},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7682",
"name":"76th & Second",
"street":"1449 Second Avenue",
"city":"New York",
"location" : { "latitude":40.771213, "longitude":-73.956828}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7341",
"name":"23rd & 3rd",
"street":"296-300 Third Avenue",
"city":"New York",
"location" : { "latitude":40.738792, "longitude":-73.983401}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7800",
"name":"Grand Central Station 2",
"street":"7800 Grand Central Station, Track 35",
"city":"New York",
"location" : { "latitude":40.752347, "longitude":-73.977456}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"7386",
"name":"111th & Broadway",
"street":"2853 Broadway",
"city":"New York",
"location" : { "latitude":40.804695, "longitude":-73.96667}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"1379",
"name":"Target East River Plaza T-2380",
"street":"517 E 117th St",
"city":"New York",
"location" : { "latitude":40.795688, "longitude":-73.932552}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"75491",
"name":"Limited Brands-NYC",
"street":"1740 Broadway",
"city":"New York",
"location" : { "latitude":40.765221, "longitude":-73.982023}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"75271",
"name":"Javits Convention Ctr Taxi North",
"street":"655 W 34th St",
"city":"New York",
"location" : { "latitude":40.756782, "longitude":-74.003423}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"9239",
"name":"1290 Sixth Ave (Ave of Americas)",
"street":"1290 Sixth Avenue",
"city":"New York",
"location" : { "latitude":40.760875, "longitude":-73.979729}
},
{
"_class":"example.springdata.mongodb.repo.Store",
"id":"75846",
"name":"Waldorf-Astoria",
"street":"301 Park Ave",
"city":"New York",
"location" : { "latitude":40.75656, "longitude":-73.97405}
}
]
2、初始化mongo数据
/**
* 初始化mongo数据
*
* @return
*/
public @Bean
AbstractRepositoryPopulatorFactoryBean repositoryPopulator() {
ObjectMapper mapper = new ObjectMapper();
// 封装JSON，让第一个类拥有第二个类的注释
mapper.addMixIn(GeoJsonPoint.class, GeoJsonPointMixin.class);
mapper.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);
Jackson2RepositoryPopulatorFactoryBean factoryBean = new Jackson2RepositoryPopulatorFactoryBean();
factoryBean.setResources(new Resource[] { new ClassPathResource("starbucks-in-nyc.json") });
factoryBean.setMapper(mapper);
return factoryBean;
}
static abstract class GeoJsonPointMixin {
GeoJsonPointMixin(@JsonProperty("longitude") double x, @JsonProperty("latitude") double y) {}
}
3、查询操作
@Autowired
private MongoOperations mongoOps;
@Autowired
private StoreRepository repository;
@Before
public void setUp() {
initGeo();
}
@After
public void destory(){
mongoOps.dropCollection(Venue.class);
}
/**
* 地理坐标操作
*/
@Test
public void testGeoSpatial(){
// 圆形查找
Circle circle = new Circle(30, 20, 20);
List venues =
mongoOps.find(new Query(Criteria.where("location").within(circle)), Venue.class);
System.out.println(venues);
System.out.println(venues.size());
// 球型查询
venues = mongoOps.find(new Query(Criteria.where("location").withinSphere(circle)), Venue.class);
System.out.println(venues);
System.out.println(venues.size());
// 矩形查找
Box box = new Box(new Point(10, 11), new Point(10, 20));
venues = mongoOps.find(new Query(Criteria.where("location").within(box)), Venue.class);
System.out.println(venues);
System.out.println(venues.size());
// 按距离由近到远查询
Point point = new Point(12, 12);
venues = mongoOps.find(new Query(Criteria.where("location").near(point).maxDistance(20)), Venue.class);
System.out.println(venues.size());
System.out.println(venues);
// 空间距离查询
venues = mongoOps.find(new Query(Criteria.where("location").nearSphere(point).maxDistance(20)), Venue.class);
System.out.println(venues.size());
System.out.println(venues);
// 最近点查询
NearQuery query = NearQuery.near(point).maxDistance(new Distance(100000, Metrics.KILOMETERS));
GeoResults result = mongoOps.geoNear(query, Venue.class);
System.out.println(result);
}
/**
* 使用GeoJSON和遗留格式调用它
*/
@Test
public void testGeoJSON(){
/*
* {
* "location": {
* "$geoWithin": {
* "$geometry": {
* "type": "Polygon",
* "coordinates": [
* [
* [-73.992514,40.758934],
* [-73.961138,40.760348],
* [-73.991658,40.730006],
* [-73.992514,40.758934]
* ]
* ]
* }
* }
* }
* }
*/
List storeList = repository.findByLocationWithin(
new GeoJsonPolygon(
new Point(-73.992514, 40.758934),
new Point(-73.961138, 40.760348),
new Point(-73.991658, 40.730006),
new Point(-73.992514, 40.758934)));
System.out.println(storeList);
System.out.println(storeList.size());
/*
* {
* "location" : {
* "$geoWithin" : {
* "$polygon" : [ [-73.992514,40.758934] , [-73.961138,40.760348] , [-73.991658,40.730006] ]
* }
* }
* }
*/
storeList = repository.findByLocationWithin(
new Polygon(
new Point(-73.992514, 40.758934),
new Point(-73.961138, 40.760348),
new Point(-73.991658, 40.730006)));
System.out.println(storeList);
System.out.println(storeList.size());
}
private void initGeo(){
for (int x = 100; x < 131; x++) {
for (int y = 30; y < 61; y++) {
Double loca[] = new Double[]{Double.valueOf(x), Double.valueOf(y)};
Venue venue = new Venue("venue" + Arrays.toString(loca),Double.valueOf(x), Double.valueOf(y));
mongoOps.insert(venue);
}
}
}