使用特定功能代码

1.通过高德api将我国省市区存入数据库

　　1）用到的工具类

package com.ty.tyzxtj.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;

/**
 * http工具类
 * @author wangjiping
 *
 */
public class HttpUtil {
    // 超时时间
    public static final int TIME_OUT = 50000;
    public static String post(String postUrl){
        String response = "";
        PostMethod postMethod = new PostMethod(postUrl);
        try {
            HttpClient client = new HttpClient();
            client.getHttpConnectionManager().getParams()
                    .setConnectionTimeout(50000);// 设置连接时间
            int status = client.executeMethod(postMethod);
            if (status == HttpStatus.SC_OK) {
                InputStream inputStream = postMethod.getResponseBodyAsStream();
                BufferedReader br = new BufferedReader(new InputStreamReader(
                        inputStream));
                StringBuffer stringBuffer = new StringBuffer();
                String str = "";
                while ((str = br.readLine()) != null) {
                    stringBuffer.append(str);
                }
                response = stringBuffer.toString();
            } else {
                response = "fail";
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 释放连接
            postMethod.releaseConnection();
        }
        return response;
    }
    public static String loadJson (String url) {  
        StringBuilder json = new StringBuilder();  
        try {  
            URL urlObject = new URL(url);  
            URLConnection uc = urlObject.openConnection();  
            BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream()));  
            String inputLine = null;  
            while ( (inputLine = in.readLine()) != null) {  
                json.append(inputLine);  
            }  
            in.close();  
        } catch (MalformedURLException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        return json.toString();  
    } 
    public static String get(String url){
        String html = "";
        // 构造HttpClient的实例
        HttpClient httpClient = new HttpClient();
        // 创建GET方法的实例
        GetMethod getMethod = new GetMethod(url);
        // 使用系统提供的默认的恢复策略 不重试
        getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler(0, false));
        getMethod.setRequestHeader("Connection" , "Keep-Alive");
        httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(TIME_OUT);
        httpClient.getHttpConnectionManager().getParams().setSoTimeout(TIME_OUT);
        try {
            // 执行getMethod
            int statusCode = httpClient.executeMethod(getMethod);
            if (statusCode != HttpStatus.SC_OK) {
                System.err.println("Method failed: " + getMethod.getStatusLine());
            }
            // 处理内容
            html = getMethod.getResponseBodyAsString();
        } catch (Exception e) {
        } finally {
            // 释放连接
            getMethod.releaseConnection();
        }
        return html;
    }
}

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