Neo4j是一个图数据库，图数据库的设计目的是用于存储和处理各种多维度的关系。比如常见的社交图谱等。下面是一个个体Neo4j的REST API来进行图结构操作的例子。
下载解压：
在这里下载：download
$ tar xfz neo4j-community-1.4.M04-unix.tar.gz $ rm neo4j-community-1.4.M04-unix.tar.gz $ cd neo4j-community-1.4.M04/
启动Neo4j
#可以按需要修改配置文件 $ nano conf/neo4j-server.properties #启动 $ ./bin/neo4j start Starting Neo4j Server... Waiting for Neo4j Server..... 7/4/11 7:07:13 PM org.neo4j.server.database.Database INFO: Using database at NEO4J/neo4j-community-1.4.M04/data/graph.db 7/4/11 7:07:13 PM org.neo4j.server.modules.DiscoveryModule INFO: Mounted discovery module at [/] Adding JAXRS packages [org.neo4j.server.rest.discovery] at [/] Adding JAXRS packages [org.neo4j.server.rest.web] at [/db/data] Adding JAXRS packages [org.neo4j.server.webadmin.rest] at [/db/manage] 7/4/11 7:07:13 PM org.neo4j.server.modules.RESTApiModule INFO: Mounted REST API at [/db/data/] 7/4/11 7:07:13 PM org.neo4j.server.modules.ManagementApiModule INFO: Mounted management API at [/db/manage/] 7/4/11 7:07:13 PM org.neo4j.server.modules.WebAdminModule INFO: Mounted webadmin at [/webadmin] 7/4/11 7:07:13 PM org.neo4j.server.NeoServerWithEmbeddedWebServer INFO: Starting Neo Server on port [7474] 7/4/11 7:07:13 PM org.neo4j.server.web.Jetty6WebServer INFO: Mounting static content at [/webadmin] from [webadmin-html] 7/4/11 7:07:15 PM org.neo4j.server.NeoServerWithEmbeddedWebServer INFO: Server started on [http://okazaki:7474/] running: PID:2816
访问根目录
$ curl -D - -H Accept:application/json "http://localhost:7474/db/data/"
HTTP/1.1 200 OK
Content-Length: 410
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"relationship_index" : "http://localhost:7474/db/data/index/relationship",
"node" : "http://localhost:7474/db/data/node",
"relationship_types" : "http://localhost:7474/db/data/relationship/types",
"extensions_info" : "http://localhost:7474/db/data/ext",
"node_index" : "http://localhost:7474/db/data/index/node",
"reference_node" : "http://localhost:7474/db/data/node/0",
"extensions" : {
}
创建一个数据节点：
$ curl -D - -H Accept:application/json -X POST http://localhost:7474/db/data/node
HTTP/1.1 201 Created
Content-Length: 968
Location: http://localhost:7474/db/data/node/2
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"outgoing_relationships" : "http://localhost:7474/db/data/node/2/relationships/out",
(...)
设置节点的各种属性：
$ curl -D - -H Content-Type:application/json -X PUT \
-d '{"name":"Charles Darwin","birthDate":"1809-02-12","deathDate":"1882-04-19","knownFor":["Voyage of the Beagle","On the Origin of Species evolution by natural selection"]}' \
http://localhost:7474/db/data/node/2/properties
HTTP/1.1 204 No Content
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
查看设置好的节点信息：
$ curl -D - -H Accept:application/json http://localhost:7474/db/data/node/2HTTP/1.1 200 OK
Content-Length: 1166
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"outgoing_relationships" : "http://localhost:7474/db/data/node/2/relationships/out",
"data" : {
"knownFor" : [ "Voyage of the Beagle", "On the Origin of Species evolution by natural selection" ],
"name" : "Charles Darwin",
"birthDate" : "1809-02-12",
"deathDate" : "1882-04-19"
},
"traverse" : "http://localhost:7474/db/data/node/2/traverse/{returnType}",
"all_typed_relationships" : "http://localhost:7474/db/data/node/2/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/2/properties/{key}",
"self" : "http://localhost:7474/db/data/node/2",
"properties" : "http://localhost:7474/db/data/node/2/properties",
"outgoing_typed_relationships" : "http://localhost:7474/db/data/node/2/relationships/out/{-list|&|types}",
"incoming_relationships" : "http://localhost:7474/db/data/node/2/relationships/in",
"extensions" : {
},
"create_relationship" : "http://localhost:7474/db/data/node/2/relationships",
"all_relationships" : "http://localhost:7474/db/data/node/2/relationships/all",
"incoming_typed_relationships" : "http://localhost:7474/db/data/node/2/relationships/in/{-list|&|types}"
}
仅查看节点属性：
$ curl -H Accept:application/json http://localhost:7474/db/data/node/2/properties
{
"knownFor" : [ "Voyage of the Beagle", "On the Origin of Species evolution by natural selection" ],
"name" : "Charles Darwin",
"birthDate" : "1809-02-12",
"deathDate" : "1882-04-19"
}
将创建节点和设置属性合到一步进行：
$ curl -D - -H Accept:application/json -H Content-Type:application/json -X POST -d '{"name":"Alfred Russel Wallace","birthDate":"1823-01-08","deathDate":"1913-11-07","knownFor":["natural selection","biogeography"]}' "http://localhost:7474/db/data/node"
HTTP/1.1 201 Created
Content-Length: 1127
Location: http://localhost:7474/db/data/node/3
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"outgoing_relationships" : "http://localhost:7474/db/data/node/3/relationships/out",
"data" : {
"knownFor" : [ "natural selection", "biogeography" ],
"name" : "Alfred Russel Wallace",
"birthDate" : "1823-01-08",
"deathDate" : "1913-11-07"
},
"traverse" : "http://localhost:7474/db/data/node/3/traverse/{returnType}",
(...)
}
设置某一个属性：
$ curl D - -H Accept:application/json -H Content-Type:application/json -X PUT \
-d '"United Kingdom"' \
"http://localhost:7474/db/data/node/3/properties/citizenship"
HTTP/1.1 204 No Content
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
$ curl -H Accept:application/json http://localhost:7474/db/data/node/3/properties{
"knownFor" : [ "natural selection", "biogeography" ],
"name" : "Alfred Russel Wallace",
"citizenship" : "United Kingdom",
"birthDate" : "1823-01-08",
"deathDate" : "1913-11-07"
}
删除节点：
$ curl -D - -H Accept:application/json -X POST http://localhost:7474/db/data/node HTTP/1.1 201 Created Content-Length: 968 Location: http://localhost:7474/db/data/node/4 Content-Encoding: UTF-8 Content-Type: application/json Access-Control-Allow-Origin: * Server: Jetty(6.1.25) $ curl -D - -X DELETE http://localhost:7474/db/data/node/4 HTTP/1.1 204 No Content Access-Control-Allow-Origin: * Server: Jetty(6.1.25)
创建一个Darwin认识Wallace的关系：
$ curl -D - -H Accept:application/json -H Content-Type:application/json -X POST -d '{"type":"KNOWS","to":"http://localhost:7474/db/data/node/3","data":{"ref":"http://en.wikipedia.org/wiki/Charles_Darwin"}}' "http://localhost:7474/db/data/node/2/relationships"
HTTP/1.1 201 Created
Content-Length: 439
Location: http://localhost:7474/db/data/relationship/0
Content-Encoding: UTF-8
Content-Type: application/json
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
{
"start" : "http://localhost:7474/db/data/node/2",
"data" : {
"ref" : "http://en.wikipedia.org/wiki/Charles_Darwin"
},
"self" : "http://localhost:7474/db/data/relationship/0",
"property" : "http://localhost:7474/db/data/relationship/0/properties/{key}",
"properties" : "http://localhost:7474/db/data/relationship/0/properties",
"type" : "KNOWS",
"extensions" : {
},
"end" : "http://localhost:7474/db/data/node/3"
}
#获取这个关系的相关信息
$ curl -H Content-Type:application/json "http://localhost:7474/db/data/relationship/0/properties"
{
"ref" : "http://en.wikipedia.org/wiki/Charles_Darwin"
}
为这个关系设置属性：
$ curl -D - -H Content-Type:application/json -X PUT -d '"Darwin received a letter from Wallace asking if the book would examine human origins"' "http://localhost:7474/db/data/relationship/0/properties/comment"
HTTP/1.1 204 No Content
Access-Control-Allow-Origin: *
Server: Jetty(6.1.25)
$ curl -H Content-Type:application/json "http://localhost:7474/db/data/relationship/0/properties"
{
"ref" : "http://en.wikipedia.org/wiki/Charles_Darwin",
"comment" : "Darwin received a letter from Wallace asking if the book would examine human origins"
}
获取关系类型列表：
$ curl -H Content-Type:application/json "http://localhost:7474/db/data/relationship/types" ["KNOWS"]
获取关系列表：
#from Darwin
$ curl -H Content-Type:application/json "http://localhost:7474/db/data/node/2/relationships/out/KNOWS"
[ {
"start" : "http://localhost:7474/db/data/node/2",
"data" : {
"ref" : "http://en.wikipedia.org/wiki/Charles_Darwin",
"comment" : "Darwin received a letter from Wallace asking if the book would examine human origins"
},
"self" : "http://localhost:7474/db/data/relationship/0",
"property" : "http://localhost:7474/db/data/relationship/0/properties/{key}",
"properties" : "http://localhost:7474/db/data/relationship/0/properties",
"type" : "KNOWS",
"extensions" : {
},
"end" : "http://localhost:7474/db/data/node/3"
} ]
#in to Darwin
$ curl -H Content-Type:application/json "http://localhost:7474/db/data/node/2/relationships/in/KNOWS"
[ ]
#out from wallace
$ curl -H Content-Type:application/json "http://localhost:7474/db/data/node/3/relationships/out/KNOWS"
[ ]
#all from/to wallace
$ curl -H Content-Type:application/json "http://localhost:7474/db/data/node/3/relationships/all/KNOWS"
[ {
"start" : "http://localhost:7474/db/data/node/2",
"data" : {
"ref" : "http://en.wikipedia.org/wiki/Charles_Darwin",
"comment" : "Darwin received a letter from Wallace asking if the book would examine human origins"
},
"self" : "http://localhost:7474/db/data/relationship/0",
"property" : "http://localhost:7474/db/data/relationship/0/properties/{key}",
"properties" : "http://localhost:7474/db/data/relationship/0/properties",
"type" : "KNOWS",
"extensions" : {
},
"end" : "http://localhost:7474/db/data/node/3"
} ]
shutdown服务器：
$ ./bin/neo4j stop Stopping Neo4j Server... 7/4/11 7:09:30 PM org.neo4j.server.NeoServerBootstrapper INFO: Neo4j Server shutdown initiated by kill signal 7/4/11 7:09:30 PM org.neo4j.server.NeoServerWithEmbeddedWebServer INFO: Successfully shutdown Neo Server on port [7474] Waiting for Neo4j Server to exit... Stopped Neo4j Server.