首先需要将对应JAR包 放入

/var/lib/neo4j/plugins 下(LINUX) ,WIN的话应该也是对应的 plugins 文件下

mysql

//jar 包   mysql-connector-java-8.0.11  
CALL apoc.load.driver("com.mysql.jdbc.Driver");
WITH "jdbc:mysql://{host}/northwind?user={account}&password={password}&useUnicode=true&characterEncoding=utf8" as url
CALL apoc.load.jdbc(url,"select * from Company where id >$maxID limit 0,3000") YIELD row
RETURN count(*);

neo4j

call apoc.bolt.load(bolt地址,查询语句,查询语句参数)

call apoc.bolt.load("bolt://{account}:{password}@{host}",
"MATCH (n:Company) WHERE n.sub_company>1 with n skip $skip limit $limit return  n as company", 
{skip: 0,limit:10}) yield row  

mongodb

//JAR 包  mongo-java-driver-3.4.2，mongodb-driver-3.4.2 ，mongodb-driver-core-3.4.2，bson-3.4.2  ！重启后生效
//参数 含义 如下图

CALL apoc.mongodb.find('mongodb://{account}:{password}@{host}/?authSource={authDB}&ssh=true','{DBName}','{collection}',{name:'名称'},null,null,false,0,10) YIELD value
MATCH (com:Company{company:value.name})
return com.company,value.boss

通过接口的形式

WITH "https://api.caiyunapp.com/v2/TAkhjf8d1nlSlspN/119.76465,49.273644/realtime.jsonp" AS url
CALL apoc.load.json(url) YIELD value
RETURN value.result   //json数据可以当map 直接读取