以下是我的自定义函数代码：

package com.fr.function;

import java.net.URL;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.IOException;

import com.fr.script.AbstractFunction;

public class webget extends AbstractFunction {

public Object run(Object[] args) {

URL url = new URL(args[0].toString());

BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));

String Line="";

while((Line=reader.readLine()) != null){

Line += Line;

}

reader.close();

return Line;

    }

}

下面这个代码能编译通过，但是无返回值：

package com.fr.function;

import java.net.URL;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import com.fr.script.AbstractFunction;

public class webget extends AbstractFunction {

public Object run(Object[] args) {

try {

URL url = new URL("http://www.baidu.com");

BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));

String Line="";

while((Line=reader.readLine()) != null){

Line += Line;

}

reader.close();

return Line;

} catch(Exception e){

return e.getMessage();

}

}

}