AWT+Swing实现百度图像识别

1准备

1.1在百度智能云中创建自己的应用，得到API Key和Secret Key

1.2maven导入SDK依赖

2源码

import java.net.URLEncoder;

/**
 * 植物识别
 */
public class Plant {

    /**
     * 重要提示代码中所需工具类
     * FileUtil,Base64Util,HttpUtil,GsonUtils请从
     * https://ai.baidu.com/file/658A35ABAB2D404FBF903F64D47C1F72
     * https://ai.baidu.com/file/C8D81F3301E24D2892968F09AE1AD6E2
     * https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3
     * https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3
     * 下载
     */
    public static String plant(String filepath) {
        // 请求url
        String url = "https://aip.baidubce.com/rest/2.0/image-classify/v1/plant";
        try {
            // 本地文件路径
            String filePath = filepath;
            byte[] imgData = FileUtil.readFileByBytes(filePath);
            String imgStr = Base64Util.encode(imgData);
            String imgParam = URLEncoder.encode(imgStr, "UTF-8");

            String param = "image=" + imgParam;

            // 注意这里仅为了简化编码每一次请求都去获取access_token，线上环境access_token有过期时间， 客户端可自行缓存，过期后重新获取。
            String accessToken = "24.7f4883fe5860ec0d24daf440ad4635c9.2592000.1669687769.282335-28090979";

            String result = HttpUtil.post(url, accessToken, param);
            System.out.println(result);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
//        Plant.plant();
    }
}

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;

/**
 * http 工具类
 */
public class HttpUtil {

    public static String post(String requestUrl, String accessToken, String params)
            throws Exception {
        String contentType = "application/x-www-form-urlencoded";
        return HttpUtil.post(requestUrl, accessToken, contentType, params);
    }

    public static String post(String requestUrl, String accessToken, String contentType, String params)
            throws Exception {
        String encoding = "UTF-8";
        if (requestUrl.contains("nlp")) {
            encoding = "GBK";
        }
        return HttpUtil.post(requestUrl, accessToken, contentType, params, encoding);
    }

    public static String post(String requestUrl, String accessToken, String contentType, String params, String encoding)
            throws Exception {
        String url = requestUrl + "?access_token=" + accessToken;
        return HttpUtil.postGeneralUrl(url, contentType, params, encoding);
    }

    public static String postGeneralUrl(String generalUrl, String contentType, String params, String encoding)
            throws Exception {
        URL url = new URL(generalUrl);
        // 打开和URL之间的连接
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        // 设置通用的请求属性
        connection.setRequestProperty("Content-Type", contentType);
        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setUseCaches(false);
        connection.setDoOutput(true);
        connection.setDoInput(true);

        // 得到请求的输出流对象
        DataOutputStream out = new DataOutputStream(connection.getOutputStream());
        out.write(params.getBytes(encoding));
        out.flush();
        out.close();

        // 建立实际的连接
        connection.connect();
        // 获取所有响应头字段
        Map<String, List<String>> headers = connection.getHeaderFields();
        // 遍历所有的响应头字段
        for (String key : headers.keySet()) {
            System.err.println(key + "--->" + headers.get(key));
        }
        // 定义 BufferedReader输入流来读取URL的响应
        BufferedReader in = null;
        in = new BufferedReader(
                new InputStreamReader(connection.getInputStream(), encoding));
        String result = "";
        String getLine;
        while ((getLine = in.readLine()) != null) {
            result += getLine;
        }
        in.close();
        System.err.println("result:" + result);
        return result;
    }
}

import java.io.*;

/**
 * 文件读取工具类
 */
public class FileUtil {

    /**
     * 读取文件内容，作为字符串返回
     */
    public static String readFileAsString(String filePath) throws IOException {
        File file = new File(filePath);
        if (!file.exists()) {
            throw new FileNotFoundException(filePath);
        } 

        if (file.length() > 1024 * 1024 * 1024) {
            throw new IOException("File is too large");
        } 

        StringBuilder sb = new StringBuilder((int) (file.length()));
        // 创建字节输入流
        FileInputStream fis = new FileInputStream(filePath);
        // 创建一个长度为10240的Buffer
        byte[] bbuf = new byte[10240];
        // 用于保存实际读取的字节数
        int hasRead = 0;
        while ( (hasRead = fis.read(bbuf)) > 0 ) {
            sb.append(new String(bbuf, 0, hasRead));
        }
        fis.close();
        return sb.toString();
    }

    /**
     * 根据文件路径读取byte[] 数组
     */
    public static byte[] readFileByBytes(String filePath) throws IOException {
        File file = new File(filePath);
        if (!file.exists()) {
            throw new FileNotFoundException(filePath);
        } else {
            ByteArrayOutputStream bos = new ByteArrayOutputStream((int) file.length());
            BufferedInputStream in = null;

            try {
                in = new BufferedInputStream(new FileInputStream(file));
                short bufSize = 1024;
                byte[] buffer = new byte[bufSize];
                int len1;
                while (-1 != (len1 = in.read(buffer, 0, bufSize))) {
                    bos.write(buffer, 0, len1);
                }

                byte[] var7 = bos.toByteArray();
                return var7;
            } finally {
                try {
                    if (in != null) {
                        in.close();
                    }
                } catch (IOException var14) {
                    var14.printStackTrace();
                }

                bos.close();
            }
        }
    }
}

/**
 * Base64 工具类
 */
public class Base64Util {
    private static final char last2byte = (char) Integer.parseInt("00000011", 2);
    private static final char last4byte = (char) Integer.parseInt("00001111", 2);
    private static final char last6byte = (char) Integer.parseInt("00111111", 2);
    private static final char lead6byte = (char) Integer.parseInt("11111100", 2);
    private static final char lead4byte = (char) Integer.parseInt("11110000", 2);
    private static final char lead2byte = (char) Integer.parseInt("11000000", 2);
    private static final char[] encodeTable = new char[]{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'};

    public Base64Util() {
    }

    public static String encode(byte[] from) {
        StringBuilder to = new StringBuilder((int) ((double) from.length * 1.34D) + 3);
        int num = 0;
        char currentByte = 0;

        int i;
        for (i = 0; i < from.length; ++i) {
            for (num %= 8; num < 8; num += 6) {
                switch (num) {
                    case 0:
                        currentByte = (char) (from[i] & lead6byte);
                        currentByte = (char) (currentByte >>> 2);
                    case 1:
                    case 3:
                    case 5:
                    default:
                        break;
                    case 2:
                        currentByte = (char) (from[i] & last6byte);
                        break;
                    case 4:
                        currentByte = (char) (from[i] & last4byte);
                        currentByte = (char) (currentByte << 2);
                        if (i + 1 < from.length) {
                            currentByte = (char) (currentByte | (from[i + 1] & lead2byte) >>> 6);
                        }
                        break;
                    case 6:
                        currentByte = (char) (from[i] & last2byte);
                        currentByte = (char) (currentByte << 4);
                        if (i + 1 < from.length) {
                            currentByte = (char) (currentByte | (from[i + 1] & lead4byte) >>> 4);
                        }
                }

                to.append(encodeTable[currentByte]);
            }
        }

        if (to.length() % 4 != 0) {
            for (i = 4 - to.length() % 4; i > 0; --i) {
                to.append("=");
            }
        }

        return to.toString();
    }
}

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;

/**
 * 获取token类
 */
public class AuthService {

    /**
     * 获取权限token
     * @return 返回示例：
     * {
     * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
     * "expires_in": 2592000
     * }
     */
    public static String getAuth() {
        // 官网获取的 API Key 更新为你注册的
        String clientId = "cGeY3XuO1InooREZl1wpqMEW";
        // 官网获取的 Secret Key 更新为你注册的
        String clientSecret = "zdVL0DIZr0lDBR1o5fXB7pIiyWBhAMei";
        return getAuth(clientId, clientSecret);
    }

    /**
     * 获取API访问token
     * 该token有一定的有效期，需要自行管理，当失效时需重新获取.
     * @param ak - 百度云官网获取的 API Key
     * @param sk - 百度云官网获取的 Securet Key
     * @return assess_token 示例：
     * "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"
     */
    public static String getAuth(String ak, String sk) {
        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + ak
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + sk;
        try {
            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.err.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            System.err.println("result:" + result);
            JSONObject jsonObject = new JSONObject(result);
            String access_token = jsonObject.getString("access_token");
            return access_token;
        } catch (Exception e) {
            System.err.printf("获取token失败！");
            e.printStackTrace(System.err);
        }
        return null;
    }

}

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import json.JsonObjectHandleJson;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Image;

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.FileNameExtensionFilter;

import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashSet;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.Font;
import java.util.List;
import java.util.Map;

public class PlantFrm extends JFrame{

    private JPanel contentPane;
    private static JLabel lblNewLabel;
    private static JLabel prcresult;
    private JButton btnNewButton ;
    private JButton btnSecButton ;
    private static String filepath;
    private static String result;
    private static List<String> name;
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    PlantFrm frame = new PlantFrm();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public PlantFrm() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 622, 421);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        lblNewLabel = new JLabel("");
        lblNewLabel.setBounds(36, 39, 250, 250);
        contentPane.add(lblNewLabel);

        btnNewButton = new JButton("上传图片");
        btnNewButton.setFont(new Font("宋体", Font.BOLD, 18));
        btnNewButton.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                addPicture(btnNewButton);
            }
        });

        btnNewButton.setBounds(100, 300, 150, 46);
        contentPane.add(btnNewButton);

        btnSecButton = new JButton("上传图片验证");
        btnSecButton.setFont(new Font("宋体", Font.BOLD, 18));
        btnSecButton.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                System.out.println(name);
                prcresult = new JLabel("这个植物是:"+String.valueOf(name));
                prcresult.setBounds(340,60,200,200);
                prcresult.setFont(new Font("宋体",Font.BOLD, 14));
                contentPane.add(prcresult);
            }
        });

        btnSecButton.setBounds(355, 300, 150, 46);
        contentPane.add(btnSecButton);
    }

    //上传图片
    public static void addPicture(JButton button) {
        JFileChooser chooser = new JFileChooser();
        chooser.setMultiSelectionEnabled(true);
        /** 过滤文件类型 * */
        FileNameExtensionFilter filter = new FileNameExtensionFilter("jpg","png");
        chooser.setFileFilter(filter);
        int returnVal = chooser.showOpenDialog(button);
        if (returnVal == JFileChooser.APPROVE_OPTION) {
            /** 得到选择的文件* */
            File[] arrfiles = chooser.getSelectedFiles();
            if (arrfiles == null || arrfiles.length == 0) {
                return;
            }
            //判断是否有文件为jpg或者png
            File  ff = chooser.getSelectedFile();
            //创建一个fileName得到选择文件的名字
            String fileName =ff.getName();
            //lastIndexOf(".") 返回"."在文件名中最后一次出现的下标
            //substring(int index)从指定的index开始截取后面的字符串
            //比如： a.txt 最后一次出现的.下标是 1 substring(1)就是从下标1的位置开始截取 截取后的新字符串为 .txt
            //所以这里需要+1 才能只截取文件类型 txt
            String prefix=fileName.substring(fileName.lastIndexOf(".")+1);
            //判断选择的文件是否是图片文件 必须排除不是的情况 不然后续操作会报错
            if(!(prefix.equals("jpg") || prefix.equals("png"))){
                JOptionPane.showMessageDialog(new JDialog(),":请选择.jpg 或 .png格式的图片");
                return;
            }
            FileInputStream input = null;
            FileOutputStream out = null;
            //要上传到的路径，这里可以设你要放图片的路径
            String path = "D:\\Photo";
            try {
                for (File f : arrfiles) {
                    File dir = new File(path);
                    /** 目标文件夹 * */
                    File[] fs = dir.listFiles();
                    HashSet<String> set = new HashSet<String>();
                    for (File file : fs) {
                        set.add(file.getName());
                    }
                    /** 判断是否已有该文件* */
                    if (set.contains(f.getName())) {
                        JOptionPane.showMessageDialog(new JDialog(),
                                f.getName() + ":该文件已存在！");
                        return;
                    }else {
                        filepath = path +"\\"+ f.getName();
                    }
                    System.out.println(filepath);

                    //通过文件选择器对象拿到选择的文件.拿到该文件的绝对路径
                    String absolutePath = chooser.getSelectedFile().getAbsolutePath();
                    //创建一个ImageIcon对象 传入图片文件的绝对路径
                    ImageIcon imageIcon = new ImageIcon(absolutePath);
                    lblNewLabel.setIcon(imageIcon);
                    lblNewLabel.getIcon();
                    input = new FileInputStream(f);
                    byte[] buffer = new byte[1024];
                    File des = new File(path, f.getName());
                    out = new FileOutputStream(des);
                    int len = 0;
                    while (-1 != (len = input.read(buffer))) {
                        out.write(buffer, 0, len);
                    }
                    out.close();
                    input.close();
                }
                JOptionPane.showMessageDialog(null, "上传成功！", "提示",
                        JOptionPane.INFORMATION_MESSAGE);
            } catch (FileNotFoundException e1) {
                JOptionPane.showMessageDialog(null, "上传失败！", "提示",
                        JOptionPane.ERROR_MESSAGE);
                e1.printStackTrace();
            } catch (IOException e1) {
                JOptionPane.showMessageDialog(null, "上传失败！", "提示",
                        JOptionPane.ERROR_MESSAGE);
                e1.printStackTrace();
            }
            result = Plant.plant(filepath);

            name = JsonObjectHandleJson.getanimalmsg(result);
            System.out.println("------------name:"+name);

        }
    }
}

3结果