一个简单的中英文翻译词典学习(类似灵格斯)一
一种中英文翻译工具灵格斯,原理如下,输入相关的要翻译的字词,到相关网站中查询,将结果在本地显示。手机中实现这个功能,必须用手机访问Web的知识。学习JEE的童鞋明白,许多东西底层使用Apache HttpClient实现功能。如一个XFire底层访问,一些web的服务器底层等,一些常用的应用程序访问web网站等都是用这个组件开发,学习Android的童鞋会发现Android SDK中包含这个组件HttpClient, 但是他的功能没有JEE的HTTPClient的公共强大,但是仍然非常强悍!好了言归正传,开始讲解关于一个简单中英文翻译字典的实现。
Android中实现原理讲解:采用HttpClient或者URLConnection访问得到结果,解析实现而已。至于界面吗?可以自行安排。好了看一下实现效果呗!
重点代码如下:
package com.easyway.android.xdict;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
/**
* 手机访问远程http请求的信息
* @author longgangbai
* @date 2010-5-25
* @version 1.0
* @since JDK6.0
*/
public class HTTPClient {
private final static String DEFAULT_CHARSET="UTF-8";
/**
* 手机远程请求文件信息解析
* @param urlPath
* @param map
* @return
*/
public static String executeByHttpURLConnection(String urlPath,Map<String, String> map){
String result="";
InputStream is =null;
OutputStream os = null;
try {
URL url = new URL(urlPath);
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
//设置请求的方式
httpCon.setRequestMethod("POST");
//设置输入的信息
httpCon.setDoInput(true);
//设置输出信息
httpCon.setDoOutput(true);
//设置是否使用缓存
httpCon.setUseCaches(false);
//设置请求的参数
if(map!=null)
{
Set<Entry<String,String>> entryMaps=map.entrySet();
for (Entry<String, String> entry : entryMaps) {
httpCon.addRequestProperty(entry.getKey(), entry.getValue());
}
}
httpCon.setRequestProperty("Charset", DEFAULT_CHARSET);
is = httpCon.getInputStream();
//os = httpCon.getOutputStream();
// 使用os发送xml数据,使用is接收服务端返回的数据
result=getResponseResult(is);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
is.close();
os.close();
} catch (Exception e) {
}
}
return result;
}
/**
* 获取相应的信息
* @param is
* @return
* @throws IOException
*/
public static String getResponseResult(InputStream is ) throws IOException{
BufferedReader br = new BufferedReader(new InputStreamReader(is, DEFAULT_CHARSET));
String line=null;
String result="";
while((line=br.readLine())!=null){
result+=line;
}
return result;
}
/**
* 手机访问页面采用apache的访问
* @param httpurl
* @return
*/
public static String executeHttpClientByApache(String httpurl,Map<String, String> map) {
// 构建HttpClient的实例的应用
HttpClient httpclient=new DefaultHttpClient();
//设置post发送的对象
HttpPost httpPost = new HttpPost();
//设置各种请求的头部信息和参数
List<NameValuePair> params=new ArrayList<NameValuePair>();
if(map!=null){
Set<Entry<String,String>> entryMaps=map.entrySet();
for (Entry<String, String> entry : entryMaps) {
params.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
}
String result="";
try {
//设置请求的格式为UTF-8形式
httpPost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
//获取响应的信息
HttpResponse response= httpclient.execute(httpPost);
//获取响应的状态
int statusCode=response.getStatusLine().getStatusCode();
if(statusCode==200){
result=EntityUtils.toString(response.getEntity(), DEFAULT_CHARSET);
}else{
System.out.println("statusCode="+statusCode);
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}
效果图如下: