neo4j采纳java语言开发，如果我们要在java程序中以内嵌方式应用neo4j，只需导入neo4j的对应包即可。
首先，我们来创建一个maven项目并改动pom.xml添加对neo4j的依附。
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="
http://maven.apache.org/POM/4.0.0" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
http://maven.apache.org/POM/4.0.0 "> <modelVersion>4.0.0</modelVersion> <groupId>neo4j-learn</groupId> <artifactId>neo4j-learn</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.neo4j</groupId> <artifactId>neo4j</artifactId> <version>1.9.4</version> </dependency> </dependencies> </project>
然后，我们在项目中创建一个neo4j.properties（数据库的配置文件）文件和一个java类（调用数据库）。
neo4j.properties
# Default values for the low-level graph engine #neostore.nodestore.db.mapped_memory=25M #neostore.relationshipstore.db.mapped_memory=50M #neostore.propertystore.db.mapped_memory=90M #neostore.propertystore.db.strings.mapped_memory=130M #neostore.propertystore.db.arrays.mapped_memory=130M # Autoindexing # Enable auto-indexing for nodes, default is false #node_auto_indexing=true # The node property keys to be auto-indexed, if enabled #node_keys_indexable=name,age # Enable auto-indexing for relationships, default is false #relationship_auto_indexing=true # The relationship property keys to be auto-indexed, if enabled #relationship_keys_indexable=name,age # Keep logical logs, needed for online backups to work keep_logical_logs=true # Enable online backups to be taken from this database. online_backup_enabled=true # Uncomment and specify these lines for running Neo4j in High Availability mode. # ha.server_id is a unique integer for each instance of the Neo4j database in the cluster. # (as opposed to the coordinator instance IDs) # example: ha.server_id=1 #ha.server_id= # ha.coordinators is a comma-separated list (without spaces) of the host:port of where to # find one or more of the Neo4j coordinator servers. # Avoid localhost due to IP resolution issues on some systems. # example: ha.coordinators=localhost:2181,1.2.3.4:4321 #ha.coordinators=localhost:2181 # You can also, optionally, configure the ha.cluster_name. This is the name of the cluster this # instance is supposed to join. Accepted characters are alphabetical, numerical, dot and dash. # This configuration is useful if you have multiple Neo4j HA clusters managed by the same # Coordinator cluster. # Example: ha.cluster_name = my.neo4j.ha.cluster #ha.cluster_name = # IP and port for this instance to bind to to communicate data with the # other neo4j instances in the cluster. This is broadcasted to the other # cluster members, so different members can have different communication ports. # Optional if the members are on different machines so the IP is different for every member. #ha.server = localhost:6001 # The interval at which slaves will pull updates from the master. Comment out # the option to disable periodic pulling of updates. Unit is seconds. ha.pull_interval = 10 # The session timeout for the zookeeper client. Lower values make new master # election happen closer to the master loosing connection but also more sensitive # to zookeeper quorum hiccups. If experiencing master switches without reason # consider increasing this value. Unit is seconds #ha.zk_session_timeout = 5 # Amount of slaves the master will try to push a transaction to upon commit (default is 1). # The master will optimistically continue and not fail the transaction even if it fails to # reach the push factor. Setting this to 0 will increase write performance when writing # through master but could potentially lead to branched data (or loss of transaction) # if the master goes down. #ha.tx_push_factor=1 # Strategy the master will use when pushing data to slaves (if the push factor is greater than 0). # There are two options available "fixed" (default) or "round_robin". Fixed will start by # pushing to slaves ordered by server id (highest first) improving performance since the # slaves only have to cache up one transaction at a time. #ha.tx_push_strategy=fixed # Enable this to be able to upgrade a store from 1.4 -> 1.5 or 1.4 -> 1.6 #allow_store_upgrade=true # Enable this to specify a parser other than the default one. 1.5, 1.6, 1.7 are available #cypher_parser_version=1.6
java文件（neo4j示例文件改动而来）