JavaWeb之抓包之旅(三) :HttpClient封装工具类
谈到httpClient相信大家都不陌生，网上也有一大推别人总结的。HttpClient是Apache Jakarta Common下的子项目，用来提供高效的、最新的、功能丰富的支持HTTP协议的客户端编程工具包，并且它支持HTTP协议最新的版本和建议。
详细请参考文档：HttpClient
我们在对数据进行请求的时候经常使用。
前不久在做一个百度地图定位的（通过GPS判断你在某个学校，但是并不是每个学校地图上都有，而且如何确定范围呢？）
类似于饿了么，我一直在想它为什么能定位到具体的某个宿舍呢？后来发现是利用了百度地图LBS云(当然这是我个人实现的方案)：
1. 调用手机GPS定位（或者浏览器定位，浏览器定位不会很精确，一般会定位到区，街道不会很详细）。获取经纬度。
2. 上传经纬度，以及名称（具体请参考百度api接口文档），比如武汉纺织大学，这样在你的百度LBS云，中就有了这个点的信息。
3. 当你手机要获取具体定位时，手机GPS获取经纬度，然后调用接口（具体请参考百度api接口文档）,获取这个点为中心，半径为50m（自己写），百度LBS云是否有这个点，有返回list信息，这样你就获取了你所在位置在哪了。
这样你在配送地址就可以自己定位了。我大胆猜测，我们用外卖软件的时候，首先它已经定位到了一个比较精确的位置，比如武汉纺织大学，但是得自己输入楼号，比如输入5号教学楼，这样他就会把，你位置的经纬度，还有武汉纺织大学5号教学楼，传到服务器上，（如果有很多人打错了字，或者其他，估计有个特定的算法，比如取数据名称相同最多的3个）。这样我们下次定位的时候，可能就在这个50m范围内，就能推荐这个地址了（武汉纺织大学5号教学楼）。
为什么要讲这个呢？我偏题了吗？
最近在做毕设，浏览器定位，我想直接用Ajax请求，url就写百度LBS云接口即可。
但是出了一个问题，我请求跨域了(本地服务器想要访问百度服务器)，虽然网上有解决跨域的方法，但是后来我想了一个解决方法，我为什么一定要用JS来访问百度LBS云接口呢？
我JS获得了经纬度，位置名称，直接传到后台服务器，然后后台通过HttpClient来请求百度云服务器不就好了吗？然后将数据返回给前端JS。
接下来我就来通过HttpClient 工具类，来进行请求，来实现百度地图定位的这个功能。
- Request.java
package com.http;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Requst分装类，封装一些信息
* 作者：Administrator
* 版本：1.0
* 创建日期：下午9:24:43
*/
public class Request {
/**请求属性*/
private Map properties;
/**请求参数*/
private Map params ;
/**请求头部*/
private Map headers;
private byte[] postData;
/**是否同步*/
private boolean sync=false;
/**
* 获得设置的属性
* @param property
* @return
*/
public String getProperty(String property) {
if(properties ==null){
return null;
}
return properties.get(property);
}
/**
* 设置属性
* @param propery
* @param value
*/
public void setProperty(String propery,String value) {
if(properties==null){
properties = new LinkedHashMap();
}
properties.put(propery, value);
}
/**
* 设置参数
* @param params
*/
public void setParam(String param,String value) {
if(params==null){
params = new LinkedHashMap();
}
params.put(param, value);
}
public Map getHeaders() {
return headers;
}
/**
* 设置头部信息
* @param header
* @param value
*/
public void setHeader(String header, String value) {
if (headers == null) {
headers = new LinkedHashMap();
}
headers.put(header, value);
}
public Map getParams() {
return params;
}
public String getHeader(String header) {
if (headers == null) {
return null;
}
return headers.get(header);
}
public Map getProperties() {
return properties;
}
public void setProperties(Map properties) {
this.properties = properties;
}
public void setParams(Map params) {
this.params = params;
}
public void setHeaders(Map headers) {
this.headers = headers;
}
public byte[] getPostData() {
return postData;
}
public void setPostData(byte[] postData) {
this.postData = postData;
}
public boolean isSync() {
return sync;
}
public void setSync(boolean sync) {
this.sync = sync;
}
}
- Response.java
package com.http;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* 响应类
* 作者：Administrator
* 版本：1.0
* 创建日期：下午9:36:03
*/
public class Response {
/**响应码*/
private int statusCode ;
/**响应内容*/
private byte[] content ;
/**响应头部*/
private Map headers;
/**
* 设置响应头
*
* @param name
* @param value
*/
public void setHeader(String name, String value) {
if (headers == null) {
headers = new LinkedHashMap();
}
headers.put(name, value);
}
/**
* 按指定编码获得响应内容，有些响应乱码了 需要解决乱码问题
* @param encoding
* @return
*/
public String getContentString(String encoding) {
try {
String contentString = new String(getContent(), encoding);
return contentString;
} catch (Exception e) {
System.out.println("不支持编码");
}
return null;
}
public int getStatusCode() {
return statusCode;
}
public void setStatusCode(int statusCode) {
this.statusCode = statusCode;
}
public byte[] getContent() {
return content;
}
public void setContent(byte[] content) {
this.content = content;
}
public Map getHeaders() {
return headers;
}
public void setHeaders(Map headers) {
this.headers = headers;
}
}
- HttpClientUtil
package com.http;
import java.io.ByteArrayOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
import java.io.UnsupportedEncodingException;
import java.net.SocketException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.zip.GZIPInputStream;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLHandshakeException;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.NoHttpResponseException;
import org.apache.http.ParseException;
import org.apache.http.ProtocolException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.CookieStore;
import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.config.CookieSpecs;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.config.RequestConfig.Builder;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.HttpHostConnectException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.cookie.Cookie;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultRedirectStrategy;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.ByteArrayBuffer;
import org.apache.http.util.EntityUtils;
/**
* HttpClient工具封装类，Post，Get请求，代理请求
* 作者：
* 版本：1.0
* 创建日期：下午9:21:00
*/
public class HttpClientUtil {
/***连接超时时间*/
private Integer connectTimeout =60*1000;
private Integer socketTimeout =180*1000;
private CloseableHttpClient httpClient = null;
private CookieStore cookieStore = new BasicCookieStore();
/** 代理请求 */
public HttpClientUtil(String proxyHost, int proxyPort) {
this(proxyHost, proxyPort, -1, -1, 0, 0, true);
}
/** 默认*/
public HttpClientUtil() {
this(null, 0, -1, -1, 0, 0, true);
}
/** 进行请求无代理设置连接时间 */
public HttpClientUtil(int socketTimeout, int connectTimeout) {
this(null, 0, socketTimeout, connectTimeout, 0, 0, true);
}
/**
*
* @param proxyHost 代理主机地址
* @param proxyPort 代理端口
* @param socketTimeout
* @param connectTimeout
* @param route
* @param maxTotal
* @param followRedirect
*/
public HttpClientUtil(String proxyHost, int proxyPort, int socketTimeout, int connectTimeout, int route, int maxTotal, boolean followRedirect){
Builder builder = RequestConfig.custom();
builder.setCookieSpec(CookieSpecs.BROWSER_COMPATIBILITY);
if (followRedirect) {
builder.setCircularRedirectsAllowed(true);
builder.setMaxRedirects(100);
}
if (StringUtils.isNotBlank(proxyHost) && proxyPort > 0) {
builder.setProxy(new HttpHost(proxyHost, proxyPort));
}
//设置连接时间
if (socketTimeout != -1) {
this.socketTimeout = socketTimeout;
}
builder.setSocketTimeout(this.socketTimeout);
if (connectTimeout != -1) {
this.connectTimeout = connectTimeout;
}
builder.setConnectTimeout(this.connectTimeout);
builder.setConnectionRequestTimeout(this.connectTimeout);
RequestConfig requestConfig = builder.build();
init(requestConfig, route, maxTotal);
}
private void init(RequestConfig requestConfig, int route, int maxTotal) {
X509TrustManager x509mgr = new X509TrustManager() {
@Override
public void checkClientTrusted(X509Certificate[] xcs, String string) {
}
@Override
public void checkServerTrusted(X509Certificate[] xcs, String string) {
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
};
SSLContext sslContext = null;
try {
sslContext = SSLContext.getInstance("TLS");
} catch (NoSuchAlgorithmException e1) {
e1.printStackTrace();
}
try {
sslContext.init(null, new TrustManager[] { x509mgr }, null);
} catch (KeyManagementException e) {
e.printStackTrace();
}
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
HttpRequestRetryHandler httpRequestRetryHandler = new HttpRequestRetryHandler() {
@Override
public boolean retryRequest(IOException exception, int executionCount, HttpContext context) {
if (executionCount >= 5) {// 如果已经重试了5次，就放弃
return false;
}
if (exception instanceof NoHttpResponseException) {// 如果服务器丢掉了连接，那么就重试
return true;
}
if (exception instanceof SSLHandshakeException) {// 不要重试SSL握手异常
return false;
}
if (exception instanceof InterruptedIOException) {// 超时
return false;
}
if (exception instanceof UnknownHostException) {// 目标服务器不可达
return false;
}
if (exception instanceof ConnectTimeoutException) {// 连接被拒绝
return false;
}
if (exception instanceof SSLException) {// ssl握手异常
return false;
}
// 2016-03-09针对broken pipe的问题做处理
if (exception instanceof SocketException) {
return true;
}
HttpClientContext clientContext = HttpClientContext.adapt(context);
HttpRequest request = clientContext.getRequest();
// 如果请求是幂等的，就再次尝试
if (!(request instanceof HttpEntityEnclosingRequest)) {
return true;
}
return false;
}
};
DefaultRedirectStrategy redirectStrategy = new DefaultRedirectStrategy() {
public boolean isRedirected(HttpRequest request, HttpResponse response, HttpContext context) {
boolean isRedirect = false;
try {
isRedirect = super.isRedirected(request, response, context);
} catch (ProtocolException e) {
e.printStackTrace();
}
if (!isRedirect) {
int responseCode = response.getStatusLine().getStatusCode();
if (responseCode == 301 || responseCode == 302) {
return true;
}
}
return isRedirect;
}
@Override
protected URI createLocationURI(String location) throws ProtocolException {
location = location.replace("|", "%7C");
return super.createLocationURI(location);
}
};
HttpClientBuilder httpClientBuilder = HttpClients.custom();
httpClientBuilder.setDefaultRequestConfig(requestConfig);
if (route > 0 && maxTotal > 0) {
PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager();
connManager.setDefaultMaxPerRoute(route);
connManager.setMaxTotal(maxTotal);
httpClientBuilder.setConnectionManager(connManager);
}
httpClientBuilder.setSSLSocketFactory(sslsf);
httpClientBuilder.setDefaultCookieStore(cookieStore);
httpClientBuilder.setRedirectStrategy(redirectStrategy);
httpClientBuilder.setRetryHandler(httpRequestRetryHandler);
httpClient = httpClientBuilder.build();
}
public Response sendRequest(Request request) throws Exception {
// request.setHeader("Accept",
// "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
// request.setHeader("Accept-Encoding", "gzip, deflate");
if (request.getHeader("User-Agent") == null) {
request.setHeader("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Firefox/24.0");
}
request.setHeader("Accept-Language", "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
request.setHeader("Connection", "keep-alive");
// logger.debug("发送请求:" + request);
String method = request.getProperty("method").toLowerCase();
String url = request.getProperty("url");
Map headers = request.getHeaders();
Map params = request.getParams();
List formParams = new ArrayList();
if (params != null && params.size() != 0) {
formParams = new ArrayList();
for (Entry entry : params.entrySet()) {
formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
}
Response response = null;
if ("post".equals(method)) {
byte[] postData = request.getPostData();
if (postData != null) {
response = post(url, postData, headers);
} else {
response = post(url, formParams, headers);
}
} else if ("get".equals(method)) {
response = get(url, formParams, headers);
}
return response;
}
/**
* Get请求
*
* @param url
* @param params
* @return
*/
public Response get(String url, List params, Map headers) {
Response response = new Response();
try {
// Get请求
HttpGet httpGet = new HttpGet(url);
String encoding = "utf-8";
// 设置头
if (headers != null && headers.size() != 0) {
for (Entry entry : headers.entrySet()) {
httpGet.setHeader(entry.getKey(), entry.getValue());
}
String contentType = headers.get("Content-Type");
if (StringUtils.isNotBlank(contentType)) {
if (matcher(contentType, "(charset)\\s?=\\s?(gbk)")) {
encoding = "gbk";
} else if (matcher(contentType, "(charset)\\s?=\\s?(gb2312)")) {
encoding = "gb2312";
}
}
}
// 设置参数,如果url上已经有了问号，就不附加参数
if (params != null && params.size() > 0) {
if (httpGet.getURI().toString().indexOf("?") == -1) {
String str = EntityUtils.toString(new UrlEncodedFormEntity(params, encoding));
httpGet.setURI(new URI(httpGet.getURI().toString() + "?" + str));
} else {
String str = EntityUtils.toString(new UrlEncodedFormEntity(params, encoding));
httpGet.setURI(new URI(httpGet.getURI().toString() + "&" + str));
}
}
// 发送请求
CloseableHttpResponse httpResponse = httpClient.execute(httpGet);
try {
int statusCode = httpResponse.getStatusLine().getStatusCode();
response.setStatusCode(statusCode);
ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
// 获取返回数据
HttpEntity entity = httpResponse.getEntity();
Header[] responseHeaders = httpResponse.getAllHeaders();
for (Header header : responseHeaders) {
response.setHeader(header.getName(), header.getValue());
}
Header header = entity.getContentEncoding();
if (header != null && header.getValue().toLowerCase().equals("gzip")) {
byte[] bytes = IOUtils.toByteArray(new GZIPInputStream(entity.getContent()));
response.setContent(bytes);
} else {
byte[] bytes = getData(entity);
response.setContent(bytes);
}
return response;
} finally {
httpResponse.close();
}
} catch (ConnectTimeoutException e) {
} catch (HttpHostConnectException e) {
} catch (ParseException e) {
} catch (UnsupportedEncodingException e) {
} catch (IOException e) {
} catch (URISyntaxException e) {
} catch (Exception e) {
}
return null;
}
/**
* // Post请求
*
* @param url
* @param params
* @return
*/
public Response post(String url, byte[] data, Map headers) {
Response response = new Response();
try {
// Post请求
HttpPost httpPost = new HttpPost(url);
// 设置头
if (headers != null && headers.size() != 0) {
for (Entry entry : headers.entrySet()) {
httpPost.setHeader(entry.getKey(), entry.getValue());
}
}
// 设置参数
httpPost.setEntity(new ByteArrayEntity(data));
// 发送请求
CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
try {
int statusCode = httpResponse.getStatusLine().getStatusCode();
response.setStatusCode(statusCode);
// 获取返回数据
HttpEntity entity = httpResponse.getEntity();
Header header = entity.getContentEncoding();
if (header != null && header.getValue().toLowerCase().equals("gzip")) {
byte[] bytes = IOUtils.toByteArray(new GZIPInputStream(entity.getContent()));
response.setContent(bytes);
} else {
byte[] bytes = EntityUtils.toByteArray(entity);
response.setContent(bytes);
}
return response;
} finally {
httpResponse.close();
}
} catch (ConnectTimeoutException e) {
} catch (HttpHostConnectException e) {
} catch (UnsupportedEncodingException e) {
} catch (ClientProtocolException e) {
} catch (ParseException e) {
} catch (IOException e) {
} catch (Exception e) {
}
return null;
}
private byte[] getData(HttpEntity entity) throws IOException {
if (entity == null) {
throw new IllegalArgumentException("HTTP entity may not be null");
}
InputStream inputStream = entity.getContent();
if (inputStream == null) {
return null;
}
try {
if (entity.getContentLength() > Integer.MAX_VALUE) {
throw new IllegalArgumentException("HTTP entity too large to be buffered in memory");
}
int i = (int) entity.getContentLength();
if (i < 0) {
i = 4096;
}
ByteArrayBuffer buffer = new ByteArrayBuffer(i);
byte[] tmp = new byte[1024];
int l = -1;
try {
while ((l = inputStream.read(tmp)) != -1) {
buffer.append(tmp, 0, l);
}
} catch (EOFException e) {
buffer.clear();
// 针对于以没有结束符的做fix处理,减小缓存,并进行异常处理,忽略最后不能获取的数据
tmp = new byte[32];
try {
while ((l = inputStream.read(tmp)) != 1) {
buffer.append(tmp, 0, l);
}
} catch (EOFException e2) {
}
}
// TODO 查明具体没有返回的原因
byte[] byteArray = buffer.toByteArray();
if (byteArray == null || byteArray.length == 0) {
return buffer.buffer();
}
return byteArray;
} finally {
inputStream.close();
}
}
/**
* // Post请求
*
* @param url
* @param params
* @return
*/
public Response post(String url, List params, Map headers) {
Response response = new Response();
try {
// Post请求
HttpPost httpPost = new HttpPost(url);
String encoding = "utf-8";
// 设置头
if (headers != null && headers.size() != 0) {
for (Entry entry : headers.entrySet()) {
httpPost.setHeader(entry.getKey(), entry.getValue());
}
String contentType = headers.get("Content-Type");
if (StringUtils.isNotBlank(contentType)) {
if (matcher(contentType, "(charset)\\s?=\\s?(gbk)")) {
encoding = "gbk";
} else if (matcher(contentType, "(charset)\\s?=\\s?(gb2312)")) {
encoding = "gb2312";
}
}
}
// 设置参数
if (params != null && params.size() > 0) {
httpPost.setEntity(new UrlEncodedFormEntity(params, encoding));
}
// 发送请求
CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
try {
int statusCode = httpResponse.getStatusLine().getStatusCode();
response.setStatusCode(statusCode);
// 获取返回数据
HttpEntity entity = httpResponse.getEntity();
Header header = entity.getContentEncoding();
if (header != null && header.getValue().toLowerCase().equals("gzip")) {
byte[] data = IOUtils.toByteArray(new GZIPInputStream(entity.getContent()));
response.setContent(data);
} else {
byte[] data = getData(entity);
response.setContent(data);
}
return response;
} finally {
httpResponse.close();
}
} catch (ConnectTimeoutException e) {
} catch (HttpHostConnectException e) {
} catch (UnsupportedEncodingException e) {
} catch (ClientProtocolException e) {
} catch (ParseException e) {
} catch (IOException e) {
} catch (Exception e) {
}
return null;
}
/**
* 获取Response内容字符集
*
* @param response
* @return
*/
public String getContentCharset(HttpResponse response) {
String charset = "ISO_8859-1";
Header header = response.getEntity().getContentType();
if (header != null) {
String s = header.getValue();
if (matcher(s, "(charset)\\s?=\\s?(utf-?8)")) {
charset = "utf-8";
} else if (matcher(s, "(charset)\\s?=\\s?(gbk)")) {
charset = "gbk";
} else if (matcher(s, "(charset)\\s?=\\s?(gb2312)")) {
charset = "gb2312";
}
}
Header encoding = response.getEntity().getContentEncoding();
return charset;
}
/**
* 正则匹配
*
* @param s
* @param pattern
* @return
*/
private boolean matcher(String s, String pattern) {
Pattern p = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE + Pattern.UNICODE_CASE);
Matcher matcher = p.matcher(s);
if (matcher.find()) {
return true;
} else {
return false;
}
}
public Integer getConnectTimeout() {
return connectTimeout;
}
public void setConnectTimeout(Integer connectTimeout) {
this.connectTimeout = connectTimeout;
}
public Integer getSocketTimeout() {
return socketTimeout;
}
public void setSocketTimeout(Integer socketTimeout) {
this.socketTimeout = socketTimeout;
}
public CloseableHttpClient getHttpClient() {
return httpClient;
}
public void setHttpClient(CloseableHttpClient httpClient) {
this.httpClient = httpClient;
}
public CookieStore getCookieStore() {
return cookieStore;
}
public void setCookieStore(CookieStore cookieStore) {
for(Cookie cookie:cookieStore.getCookies()){
this.cookieStore.addCookie(cookie);
}
}
}
我们来看看测试结果
1. 不用代理使用 默认的构造方法，结果如下
将经纬度传到百度LBS云： 
从百度地图云获得数据:
{
"status": 0,
"total": 6,
"size": 6,
"contents": [
{
"uid": 1694507525,
"province": "北京市",
"geotable_id": 137287,
"district": "东城区",
"create_time": 1463322154,
"city": "北京市",
"location": [
116.428415,
39.927109
],
"address": "北京",
"title": "武汉纺织大学5号宿舍楼",
"coord_type": 3,
"direction": "附近",
"type": 0,
"distance": 0,
"weight": 0
},
{
"uid": 1694513755,
"province": "北京市",
"geotable_id": 137287,
"district": "东城区",
"create_time": 1463322333,
"city": "北京市",
"location": [
116.428415,
39.927109
],
"address": "北京",
"title": "武汉纺织大学5号宿舍楼",
"coord_type": 3,
"direction": "附近",
"type": 0,
"distance": 0,
"weight": 0
},
{
"uid": 1694514187,
"province": "北京市",
"geotable_id": 137287,
"district": "东城区",
"create_time": 1463322402,
"city": "北京市",
"location": [
116.428415,
39.927109
],
"address": "北京",
"title": "武汉纺织大学5号宿舍楼",
"coord_type": 3,
"direction": "附近",
"type": 0,
"distance": 0,
"weight": 0
},
{
"uid": 1694526535,
"province": "北京市",
"geotable_id": 137287,
"district": "东城区",
"create_time": 1463322534,
"city": "北京市",
"location": [
116.428415,
39.927109
],
"address": "北京",
"title": "武汉纺织大学5号宿舍楼",
"coord_type": 3,
"direction": "附近",
"type": 0,
"distance": 0,
"weight": 0
},
]
}用代理，使用含有代理的构造方法，结果如下
使用代理，记得Charles开启，本地代理主机127.0.0.1或者localhost,端口8888(Charles默认)，这里只截取charles 的界面，控制台显示是一样的。
将经纬度传到百度LBS云：
- Request 可以看到请求的内容，我们可以看请求地址为http://api.map.baidu.com/geodata/v3/poi/create
- 响应内容为:
从百度地图云获得数据:
- Request ：
- Response：
到此，我们就知道如何用HttpClient工具类来请求数据了，后台要负责很多事情，比如网络请求的数据进行解析，这时HttpClient显得就重要了。
这一讲就讲到这里，有不对的地方，菜鸟希望大家指出。
下一讲，我就专门找个网站，模拟请求（登录，并抓取返回的数据）。
最后附上工程源码（Maven 项目）: HttpClient