中英翻译（基于百度翻译）
- 2019 年 10 月 8 日
- 笔记
先来看效果图
只做了简单的在线翻译，语音翻译和图片翻译都要钱，哈哈
市面上有名气的翻译公司就是有道和百度了，有道尝试了一下，分为API和SDK两种，但是demo下载下来跑不了
百度的就是API，也很简单，就是通过百度的协议去请求他们的服务器，得到翻译后的值，每个月有200万的免费，够用了
百度文档地址http://api.fanyi.baidu.com/api/trans/product/apidoc#joinFile
步骤：
java版demo下载地址https://fanyiapp.cdn.bcebos.com/api/demo/java.zip
下面是核心代码
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity"> <EditText android:id="@+id/inputChinese" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入要翻译的中文" android:singleLine="true" /> <EditText android:id="@+id/inputEnglish" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入要翻译的英文" android:singleLine="true" /> <TextView android:id="@+id/translate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="right" android:layout_margin="10dp" android:padding="10dp" android:text="翻译" android:textSize="20sp" /> <TextView android:id="@+id/outputEnglish" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="5dp" tools:text="得到的英文" /> <TextView android:id="@+id/outputChinese" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="5dp" tools:text="得到的中文" /> </LinearLayout>
import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.EditText; import android.widget.TextView; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; public class MainActivity extends AppCompatActivity { private static final String APP_ID = "20190603000304432"; private static final String SECURITY_KEY = "gZTcFc0TyR6tZS5FfmyA"; private EditText inputChinese; private EditText inputEnglish; private TextView outputEnglish; private TextView outputChinese; private TextView translate; private TransApi api; private static final int CHINESE = 1; private static final int ENGLISH = 2; private static final String TO_ENGLISH = "en"; private static final String TO_CHINESE = "zh"; private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); String str = String.valueOf(msg.obj); String value = parserJson(str); switch (msg.what) { case CHINESE: outputChinese.setText(value); break; case ENGLISH: outputEnglish.setText(value); break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); api = new TransApi(APP_ID, SECURITY_KEY); translate.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { translate(inputChinese.getText().toString(), TO_ENGLISH); translate(inputEnglish.getText().toString(), TO_CHINESE); } }); } private void initView() { inputChinese = findViewById(R.id.inputChinese); inputEnglish = findViewById(R.id.inputEnglish); outputEnglish = findViewById(R.id.outputEnglish); outputChinese = findViewById(R.id.outputChinese); translate = findViewById(R.id.translate); } private void translate(final String chinese, final String toLanguage) { new Thread(new Runnable() { @Override public void run() { String transResult = api.getTransResult(chinese, "auto", toLanguage); Message message = new Message(); switch (toLanguage) { case TO_CHINESE: message.what = CHINESE; break; case TO_ENGLISH: message.what = ENGLISH; break; } message.obj = transResult; handler.sendMessage(message); } }).start(); } private String parserJson(String str) { try { JSONObject jsonObject = new JSONObject(str); JSONArray trans_result = jsonObject.getJSONArray("trans_result"); JSONObject result = trans_result.getJSONObject(0); String dst = result.getString("dst"); return dst; } catch (JSONException e) { e.printStackTrace(); } return ""; } }
import java.io.BufferedReader; import java.io.Closeable; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLEncoder; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.Map; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; class HttpGet { protected static final int SOCKET_TIMEOUT = 10000; // 10S protected static final String GET = "GET"; public static String get(String host, Map<String, String> params) { try { // 设置SSLContext SSLContext sslcontext = SSLContext.getInstance("TLS"); sslcontext.init(null, new TrustManager[] { myX509TrustManager }, null); String sendUrl = getUrlWithQueryString(host, params); // System.out.println("URL:" + sendUrl); URL uri = new URL(sendUrl); // 创建URL对象 HttpURLConnection conn = (HttpURLConnection) uri.openConnection(); if (conn instanceof HttpsURLConnection) { ((HttpsURLConnection) conn).setSSLSocketFactory(sslcontext.getSocketFactory()); } conn.setConnectTimeout(SOCKET_TIMEOUT); // 设置相应超时 conn.setRequestMethod(GET); int statusCode = conn.getResponseCode(); if (statusCode != HttpURLConnection.HTTP_OK) { System.out.println("Http错误码：" + statusCode); } // 读取服务器的数据 InputStream is = conn.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(is)); StringBuilder builder = new StringBuilder(); String line = null; while ((line = br.readLine()) != null) { builder.append(line); } String text = builder.toString(); close(br); // 关闭数据流 close(is); // 关闭数据流 conn.disconnect(); // 断开连接 return text; } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } public static String getUrlWithQueryString(String url, Map<String, String> params) { if (params == null) { return url; } StringBuilder builder = new StringBuilder(url); if (url.contains("?")) { builder.append("&"); } else { builder.append("?"); } int i = 0; for (String key : params.keySet()) { String value = params.get(key); if (value == null) { // 过滤空的key continue; } if (i != 0) { builder.append('&'); } builder.append(key); builder.append('='); builder.append(encode(value)); i++; } return builder.toString(); } protected static void close(Closeable closeable) { if (closeable != null) { try { closeable.close(); } catch (IOException e) { e.printStackTrace(); } } } /** * 对输入的字符串进行URL编码, 即转换为%20这种形式 * * @param input 原文 * @return URL编码. 如果编码失败, 则返回原文 */ public static String encode(String input) { if (input == null) { return ""; } try { return URLEncoder.encode(input, "utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return input; } private static TrustManager myX509TrustManager = new X509TrustManager() { @Override public X509Certificate[] getAcceptedIssuers() { return null; } @Override public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException { } @Override public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException { } }; }
import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; /** * MD5编码相关的类 * * @author wangjingtao */ public class MD5 { // 首先初始化一个字符数组，用来存放每个16进制字符 private static final char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; /** * 获得一个字符串的MD5值 * * @param input 输入的字符串 * @return 输入字符串的MD5值 */ public static String md5(String input) { if (input == null) return null; try { // 拿到一个MD5转换器（如果想要SHA1参数换成”SHA1”） MessageDigest messageDigest = MessageDigest.getInstance("MD5"); // 输入的字符串转换成字节数组 byte[] inputByteArray = input.getBytes("utf-8"); // inputByteArray是输入字符串转换得到的字节数组 messageDigest.update(inputByteArray); // 转换并返回结果，也是字节数组，包含16个元素 byte[] resultByteArray = messageDigest.digest(); // 字符数组转换成字符串返回 return byteArrayToHex(resultByteArray); } catch (NoSuchAlgorithmException e) { return null; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return null; } /** * 获取文件的MD5值 * * @param file * @return */ public static String md5(File file) { try { if (!file.isFile()) { System.err.println("文件" + file.getAbsolutePath() + "不存在或者不是文件"); return null; } FileInputStream in = new FileInputStream(file); String result = md5(in); in.close(); return result; } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } public static String md5(InputStream in) { try { MessageDigest messagedigest = MessageDigest.getInstance("MD5"); byte[] buffer = new byte[1024]; int read = 0; while ((read = in.read(buffer)) != -1) { messagedigest.update(buffer, 0, read); } in.close(); String result = byteArrayToHex(messagedigest.digest()); return result; } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } private static String byteArrayToHex(byte[] byteArray) { // new一个字符数组，这个就是用来组成结果字符串的（解释一下：一个byte是八位二进制，也就是2位十六进制字符（2的8次方等于16的2次方）） char[] resultCharArray = new char[byteArray.length * 2]; // 遍历字节数组，通过位运算（位运算效率高），转换成字符放到字符数组中去 int index = 0; for (byte b : byteArray) { resultCharArray[index++] = hexDigits[b >>> 4 & 0xf]; resultCharArray[index++] = hexDigits[b & 0xf]; } // 字符数组组合成字符串返回 return new String(resultCharArray); } }
import java.util.HashMap; import java.util.Map; public class TransApi { private static final String TRANS_API_HOST = "http://api.fanyi.baidu.com/api/trans/vip/translate"; private String appid; private String securityKey; public TransApi(String appid, String securityKey) { this.appid = appid; this.securityKey = securityKey; } public String getTransResult(String query, String from, String to) { Map<String, String> params = buildParams(query, from, to); return HttpGet.get(TRANS_API_HOST, params); } private Map<String, String> buildParams(String query, String from, String to) { Map<String, String> params = new HashMap<String, String>(); params.put("q", query); params.put("from", from); params.put("to", to); params.put("appid", appid); // 随机数 String salt = String.valueOf(System.currentTimeMillis()); params.put("salt", salt); // 签名 String src = appid + query + salt + securityKey; // 加密前的原文 params.put("sign", MD5.md5(src)); return params; } }
