java有没有自动填写表单提交？

Question

描述：
我想用java(js)技术实现一个表单提交的操作，
打开某表单网页，用java对表单进行填充，然后提交。(其他站点)有点跨域的意思。
没有想到实现的思路，求教各位大神指点实现这种功能的思路。
谢谢！
目标网页是其他任何表单网页。

Answer 1

HtmlUnit自动填写表单并提交

 package ebay;  

import java.io.IOException;  
import java.net.MalformedURLException;  

import com.gargoylesoftware.htmlunit.BrowserVersion;  
import com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException;  
import com.gargoylesoftware.htmlunit.NicelyResynchronizingAjaxController;  
import com.gargoylesoftware.htmlunit.WebClient;  
import com.gargoylesoftware.htmlunit.html.DomElement;  
import com.gargoylesoftware.htmlunit.html.DomNodeList;  
import com.gargoylesoftware.htmlunit.html.HtmlButton;  
import com.gargoylesoftware.htmlunit.html.HtmlButtonInput;  
import com.gargoylesoftware.htmlunit.html.HtmlForm;  
import com.gargoylesoftware.htmlunit.html.HtmlPage;  
import com.gargoylesoftware.htmlunit.html.HtmlPasswordInput;  
import com.gargoylesoftware.htmlunit.html.HtmlSubmitInput;  
import com.gargoylesoftware.htmlunit.html.HtmlTextInput;  

public class GGManage {  
    public static void main(String[] args){  
        String sUrl="IP";//网址  
        //webclient设置  
        WebClient webClient = new WebClient(BrowserVersion.CHROME); //创建一个webclient    
        webClient.getOptions().setJavaScriptEnabled(true); // 启动JS            
        webClient.getOptions().setUseInsecureSSL(true);//忽略ssl认证              
        webClient.getOptions().setCssEnabled(false);//禁用Css，可避免自动二次请求CSS进行渲染              
        webClient.getOptions().setThrowExceptionOnScriptError(false);//运行错误时，不抛出异常     
        webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);  
        webClient.setAjaxController(new NicelyResynchronizingAjaxController());// 设置Ajax异步        
        //登录  
        try {  
            HtmlPage page = (HtmlPage) webClient.getPage(sUrl);  
            HtmlForm form=page.getForms().get(0);//page.getFormByName("");  
            HtmlTextInput  txtUName = (HtmlTextInput )form.getInputByName("UserName"); //用户名text框  
            txtUName.setValueAttribute("name");  
            HtmlPasswordInput txtPwd = (HtmlPasswordInput)form.getInputByName("Password");//密码框  
            txtPwd.setValueAttribute("password");  
            //submit没有name，只有class和value属性，通过value属性定位元素  
            HtmlSubmitInput submit=(HtmlSubmitInput) form.getInputByValue("登 录");  
            page = (HtmlPage) submit.click();//登录进入  
            webClient.waitForBackgroundJavaScript(10000);//等待1秒  

            System.out.println(page.asText());  
        }catch (Exception e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
    }  
}