JAVA - GUI学习 - GET测试工具

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最新推荐文章于 2024-08-31 18:22:24 发布

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本文链接：https://blog.youkuaiyun.com/fdsjkfbdjcnbsd/article/details/55217515

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本文介绍了一个使用Java实现GET请求的示例应用，通过Swing创建了GUI界面，允许用户输入URL并展示返回的数据。

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package HelloPackage;

import java.awt.FlowLayout;
import java.awt.List;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.Map;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class view extends JFrame {
	
	
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, java.util.List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }
    

         JPanel p=new JPanel();
  public view(){

     //setLayout(new  FlowLayout(FlowLayout.LEFT,20,40));

     /*
     setFont(new Font("Helvetica", Font.PLAIN, 14));

     getContentPane().add("North", new JButton("上"));

     getContentPane().add("South", new JButton("下"));
     //getContentPane().add("South", new JButton("下"));

     getContentPane().add("East",  new JButton("右"));

     getContentPane().add("West",  new JButton("左"));
     */

         //设置面板为流式布局居中显示，组件横、纵间距为5个像素

          p.setLayout(new  FlowLayout(FlowLayout.LEFT,20,40));
          JButton b=new JButton("Send");
          
                //将button加入到面板中
          getContentPane().add("Center",p);  //将面板加入到中间位置
          
          JLabel label1=new JLabel("网址:");
          
          final TextField Textdanhang = new TextField(40);
          Textdanhang.setText("http://www.baidu.com");
          
          final TextArea TextEdit = new TextArea(13,60);  
          
          
          
          b.addActionListener(new ActionListener() {
  			
  			@Override
  			public void actionPerformed(ActionEvent e) {
  				// TODO Auto-generated method stub
  				
  				String i =sendGet(Textdanhang.getText(),"");
  				TextEdit.setText(i);
  			}
  		});
          
          
          
          
          
          p.add(label1);  
          p.add(Textdanhang);  
          p.add(b);     
          p.add(TextEdit);  
          
          


          //使用循环加入button，注意每次加入的button对象名称都是b

          
          //但button每次均是用new新生成的，全部代表不同的button对象。


          //String.valueOf(i)，将数字转换为字符串



  }  
  

  public static void main(String args[]) {

	  view f = new view();

       f.setTitle("GET测试工具");

       f.pack();  //让窗口自适应组建大小

       f.setVisible(true);

            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    		f.setSize(500,400);  //设置界面大小  
    		
            f.setLocationRelativeTo(null);             //让窗口居中显示

    }

  }