python如何安装py4j
Mac安装:
pip 安装
pip install py4jpy4j.jar包路径:/usr/share/py4j/py4j0.x.jar or /usr/local/share/py4j/py4j0.x.jar
conda 安装(或者使用Anaconda-Navigator安装)
conda install py4jpy4j.jar包路径:/anaconda3/share/py4j/py4j0.x.jar
使用:
1、java代码
// 需要导入py4j.jar包import py4j.GatewayServer;
import java.util.Random;
public class EntryPoint {
private static final Random random = new Random();
public int randInt() {
return random.nextInt();
}
public static void main(String[] args) {
EntryPoint app = new EntryPoint();
// py4j服务
GatewayServer gatewayServer = new GatewayServer(app);
gatewayServer.start();
System.out.println("Gateway Server Started");
}
}
2、Python代码
from py4j.java_gateway import JavaGateway# 初始化
gateway = JavaGateway()
def main():
# 调用Java-EntryPoint中的randInt函数
a = gateway.entry_point.randInt()
print(a)
if __name__ == '__main__':
main()
注意:
1.导入py4j.jar包
2.运行Java代码
3.运行Python代码(必须在2之后)
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