neo4j获取所有节点个数和所有关系个数以及通过java的简单获取

红太狼 2023-02-26 11:27 41阅读 0赞

一：获取所有关系的个数

MATCH P=()-->() RETURN COUNT(*)  AS COUNT

二：获取所有节点的个数

MATCH (n) RETURN count(*) as COUNT

三:通过java获取所有关系的个数和所有节点的个数  
java代码中使用的jar包为neo4j-java-driver-1.5.1.jar版本。

Map<String,String> map=new HashMap<String, String>();
        	try { 
        			Driver driver = GraphDatabase.driver( "bolt://62.120.122.11:7687", AuthTokens.basic( "neo4j", "123456" ) );
            		Session session = driver.session();       		  
                    StatementResult result = session.run( "MATCH P=()-->() RETURN COUNT(P) AS COUNT");
                    String gxcount="";
                    while ( result.hasNext() )
                    { 
                        Record record = result.next();
                        gxcount= record.get( "COUNT").asInt()+"";
                        System.out.println( gxcount);
                    } 
                    StatementResult result1 = session.run( "MATCH (n) RETURN count(*) as COUNT");
                    String jdcount="";
                    while ( result1.hasNext() )
                    { 
                        Record record = result1.next();
                        jdcount= record.get( "COUNT").asInt()+"";
                        System.out.println( jdcount);
                    } 
                    session.close();
                    driver.close();  
                    map.put("jdcount", jdcount);
                    map.put("gxcount", gxcount);
    		} catch (Exception e) { 
    			// TODO: handle exception
    			e.printStackTrace();
    		}    	
        	return  map;