java 请求 google translate

java 请求 google translate

Table of Contents

• 1. 使用Java获取Google Translate结果
  • 1.1. 开发环境设置 Eclipse + Maven 插件
  • 1.2. 使用 commons-httpclient-3.1 进行 https 请求
  • 1.3. 进行处理具体的翻译请求
  • 1.4. 使用命令行执行 xxx.class

1 使用Java获取Google Translate结果

 

1.1 开发环境设置 Eclipse + Maven 插件

• 各种jar仓库 http://mvnrepository.com/
• 创建一个 maven 项目,在 pom.xml 里面添加依赖的包,

让 maven 顺便下载源码: Eclipse Preference->Maven->Download Artiface Sources 打勾

<dependencies>
        <dependency>
                <groupId>commons-httpclient</groupId>
                <artifactId>commons-httpclient</artifactId>
                <version>3.1</version>
        </dependency>
        <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>1.2</version>
        </dependency>

        <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
        </dependency>

        <dependency>
                <groupId>commons-lang</groupId>
                <artifactId>commons-lang</artifactId>
                <version>2.6</version>
        </dependency>

        <dependency>
                <groupId>org.json</groupId>
                <artifactId>json</artifactId>
                <version>20160212</version>
        </dependency>
</dependencies>

1.2 使用 commons-httpclient-3.1 进行 https 请求

• commons-httpclient-3.1 文档: http://hc.apache.org/httpclient-3.x/sslguide.html
• 根据上面的文档中的 Customizing SSL in HttpClient ,创建一个 MySSLSocketFactory.java

package com.zc.myhttps;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.SocketFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.httpclient.ConnectTimeoutException;
import org.apache.commons.httpclient.params.HttpConnectionParams;
import org.apache.commons.httpclient.protocol.ProtocolSocketFactory;

public class MySSLSocketFactory implements ProtocolSocketFactory {

        private SSLContext sslcontext = null;

        private SSLContext createSSLContext() {
                SSLContext sslcontext = null;
                try {
                        sslcontext = SSLContext.getInstance("SSL");
                        sslcontext.init(null,
                                        new TrustManager[] { new TrustAnyTrustManager() },
                                        new java.security.SecureRandom());

                } catch (NoSuchAlgorithmException e) {
                        e.printStackTrace();
                } catch (KeyManagementException e) {
                        e.printStackTrace();
                }
                return sslcontext;
        }

        private SSLContext getSSLContext() {
                if (this.sslcontext == null) {
                        this.sslcontext = createSSLContext();

                }
                return this.sslcontext;
        }

        public Socket createSocket(Socket socket, String host, int port,
                        boolean autoClose) throws IOException, UnknownHostException {
                return getSSLContext().getSocketFactory().createSocket(socket, host,
                                port, autoClose);
        }

        public Socket createSocket(String host, int port) throws IOException,
                        UnknownHostException {
                return getSSLContext().getSocketFactory().createSocket(host, port);
        }

        public Socket createSocket(String host, int port, InetAddress clientHost,
                        int clientPort) throws IOException, UnknownHostException {
                return getSSLContext().getSocketFactory().createSocket(host, port,
                                clientHost, clientPort);
        }

        public Socket createSocket(String host, int port, InetAddress localAddress,
                        int localPort, HttpConnectionParams params) throws IOException,
                        UnknownHostException, ConnectTimeoutException {
                if (params == null) {
                        throw new IllegalArgumentException("Parameters may not be null");
                }
                int timeout = params.getConnectionTimeout();
                SocketFactory socketfactory = getSSLContext().getSocketFactory();
                if (timeout == 0) {
                        return socketfactory.createSocket(host, port, localAddress,
                                        localPort);
                } else {
                        Socket socket = socketfactory.createSocket();
                        SocketAddress localaddr = new InetSocketAddress(localAddress,
                                        localPort);
                        SocketAddress remoteaddr = new InetSocketAddress(host, port);
                        socket.bind(localaddr);
                        socket.connect(remoteaddr, timeout);
                        return socket;
                }
        }

        // 自定义私有类
        private static class TrustAnyTrustManager implements X509TrustManager {
                public void checkClientTrusted(X509Certificate[] chain, String authType)
                                throws CertificateException {
                }

                public void checkServerTrusted(X509Certificate[] chain, String authType)
                                throws CertificateException {
                }

                public X509Certificate[] getAcceptedIssuers() {
                        return new X509Certificate[] {};
                }
        }
}

• 再注册

Protocol myhttps = new Protocol("https", new MySSLSocketFactory(), 443);
Protocol.registerProtocol("https", myhttps);

• 最后就可以根据 httpclient 进行正常的 发送请求了:如 TestHttps.java

package com.zc.myhttps;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.Map;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.protocol.Protocol;

public class TestHttps {
        public static String sendByGet(String url) {
                HttpClient httpclient = null;
                GetMethod method = null;
                String result = "";

                try {
                        httpclient = new HttpClient();
                        method = new GetMethod(url);

                        httpclient.executeMethod(method);
                        BufferedReader bs = new BufferedReader(new InputStreamReader(
                                        method.getResponseBodyAsStream(), "utf-8"));
                        String line = "";
                        while ((line = bs.readLine()) != null) {
                                result += line;
                        }
                        System.out.println("==========================获取到的结果");
                        System.out.println(result);
                        // System.out.println();
                        // System.out.println("HttpsUtil-sendByGet-url=" + url + "-result="
                        // + result);
                } catch (Exception ex) {
                        ex.printStackTrace();
                        result = "error\tcrm error " + ex.toString();
                        System.out.println("HttpsUtil-sendByGet-url=" + url + "-result="
                                        + ex.toString());

                } finally {
                        if (method != null) {
                                method.releaseConnection();
                        }
                }
                return result;
        }

        public static String sendByPost(String url, Map param) {
                HttpClient httpclient = null;
                PostMethod method = null;
                String result = "";

                try {

                        httpclient = new HttpClient();
                        method = new PostMethod(url);
                        if (param != null && !param.isEmpty()) {
                                int len = param.size();
                                method.setRequestHeader("Content-Type",
                                                "application/x-www-form-urlencoded;charset=utf-8");
                                NameValuePair[] np = new NameValuePair[len];
                                Iterator iter = param.keySet().iterator();
                                int i = 0;
                                while (iter.hasNext()) {
                                        String k = (String) iter.next();
                                        String v = (String) param.get(k);
                                        np[i].setName(k);
                                        np[i].setValue(v);
                                }

                                method.setRequestBody(np);
                        }

                        httpclient.executeMethod(method);
                        // result = method.getResponseBodyAsString();
                        BufferedReader bs = new BufferedReader(new InputStreamReader(
                                        method.getResponseBodyAsStream(), "utf-8"));
                        String line = "";
                        while ((line = bs.readLine()) != null) {
                                result += line;
                        }

                        System.out.println("HttpsUtil-sendByPost-url=" + url + "-result="
                                        + result);

                } catch (Exception ex) {
                        ex.printStackTrace();
                        result = "error\tcrm error " + ex.toString();
                        System.out.println("HttpsUtil-sendByPost-url=" + url + "-result="
                                        + ex.toString());

                } finally {
                        if (method != null) {
                                method.releaseConnection();
                        }
                }

                return result;
        }

        public static void main(String[] args) {
                Protocol myhttps = new Protocol("https", new MySSLSocketFactory(), 443);
                Protocol.registerProtocol("https", myhttps);
                sendByGet("https://translate.google.com/#en/zh-CN/word");
        }
}

1.3 进行处理具体的翻译请求

• chrome 下通过调试工具找到具体的请求头,比如查询 "word",会发现如何请求 头:

https://translate.google.com/translate_a/single?client=t&sl=en&tl=zh-CN&hl=zh-CN&dt=at&dt=bd&dt=ex&dt=ld&dt=md&dt=qca&dt=rw&dt=rm&dt=ss&dt=t&ie=UTF-8&oe=UTF-8&source=bh&ssel=0&tsel=0&kc=1&tk=253493.388741&q=word

并且可以查看到响应的Response.

• 分析Request,发现主要tk参数比如蛋疼,通过google搜索到一 个:https://github.com/cocoa520/Google_TK 感谢作者把这个tk参数搞出来.
• 有了这个 tk 参数 ,然后加上上面的 Request,就可以很快的构造需要的 url.最后按照上面的httpclient就可以随意处理了.

1.4 使用命令行执行 xxx.class

• 假如依赖 log4j json.jar

  java -cp /Users/mac/work/eclipse_luna/com.zc.myhttps/target/classes:/Users/mac/.m2/repository/org/json/json/20160212/json-20160212.jar:/Users/mac/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar com.zc.myhttps.TestHttps
  

  注意:

  • -cp 相当于 -classpath
  • /Users/mac/work/eclipse_luna/com.zc.myhttps/target/classes 这个路径加上 com.zc.myhttps.TestHttps 就可以找到 main 函数所在的文件.
  • -cp 后面依赖的jar包的分割符号是":"

Author: dai

Created: 2016-04-12 Tue 16:17

Emacs 24.5.1 (Org mode 8.2.10)

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