Spring Data ElasticSearch parnt/child search
http://stackoverflow.com/questions/23730641/parent-child-relationships-in-spring-data-elastic-search父实体类及子实体类的搜索方法如下：
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[*]@Document(indexName = "parent-child", type = "parent-entity")
[*] public class ParentEntity {
[*]
[*]
[*] @Id
[*] private String id;
[*] @Field(type = FieldType.String, index = FieldIndex.analyzed, store = true)
[*] private String name;
[*] // setter/getter
[*]
[*] public ParentEntity() {
[*] }
[*]
[*] public ParentEntity(String id, String name) {
[*] this.id = id;
[*] this.name = name;
[*] }
[*] }
[*]
[*]
[*] @Document(indexName = "parent-child", type = "child-entity")
[*] public class ChildEntity {
[*]
[*] @Id
[*] private String id;
[*] @Field(type = FieldType.String, store = true)
[*] @Parent(type = "parent-entity")
[*] private String parentId;
[*] @Field(type = FieldType.String, index = FieldIndex.analyzed, store = true)
[*] private String name;
[*]
[*] public ChildEntity() {
[*] }
[*]
[*] public ChildEntity(String id, String parentId, String name) {
[*] this.id = id;
[*] this.parentId = parentId;
[*] this.name = name;
[*] }
[*] }
// 为父实体类做索引(你还可以使用许多其它的方法做索引 例如： repositories)
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[*]ParentEntity parent1 = new ParentEntity("parent1", "First Parent");
[*] IndexQuery parentIndex1 = new IndexQuery();
[*] parentIndex1.setId(parent1.getId());
[*] parentIndex1.setObject(parent1);
[*] elasticsearchTemplate.index(parentIndex1);
[*]
[*] ParentEntity parent2 = new ParentEntity("parent2", "Second Parent");
[*] IndexQuery parentIndex2 = new IndexQuery();
[*] parentIndex2.setId(parent2.getId());
[*] parentIndex2.setObject(parent2);
[*] elasticsearchTemplate.index(parentIndex2);
// 为子实体类做索引
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[*]ChildEntity child1 = new ChildEntity("child1", parent1.getId(), "First");
[*] IndexQuery childIndex1 = new IndexQuery();
[*] childIndex1.setId(child1.getId());
[*] childIndex1.setObject(child1);
[*] childIndex1.setParentId(child1.getParentId());
[*] elasticsearchTemplate.index(childIndex1);
[*]
[*] ChildEntity child2 = new ChildEntity("child2", parent1.getId(), "Second");
[*] IndexQuery childIndex2 = new IndexQuery();
[*] childIndex2.setId(child2.getId());
[*] childIndex2.setObject(child2);
[*] childIndex2.setParentId(child2.getParentId());
[*] elasticsearchTemplate.index(childIndex2);
//搜索
对于主从结构的实体类，有三种可选的搜索方法：
1.has children 点击打开链接
2.has parent 点击打开链接
3.top children 点击打开链接
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[*]QueryBuilder query = topChildrenQuery("child-entity", QueryBuilders.termQuery("name", child1name.toLowerCase()));
[*] SearchQuery searchQuery = new NativeSearchQueryBuilder().withQuery(query).build();
[*]
[*] List<ParentEntity> parents = elasticsearchTemplate.queryForList(searchQuery, ParentEntity.class);
http://blog.csdn.net/wilsonke/article/details/44113785
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