百度地图API 云存储·LBS.云 跨域问题解决方法——通过java.net.URLConnection发送HTTP请求
百度地图API 云存储·LBS.云 跨域问题解决方法——通过java.net.URLConnection发送HTTP请求
运用原生Java Api发送简单的Get请求、Post请求
HTTP请求一般为两种，一种是GET请求，一种是POST请求。
使用Java发送这两种请求步骤如下：
- 通过统一资源定位器（java.net.URL）获取连接器（java.net.URLConnection）
- 设置请求的参数
- 发送请求
- 以输入流的形式获取返回内容
- 关闭输入流
根据上面步骤封装成HttpRequestor.java 工具类 网上参考代码很多，下面为调试并优化过的代码，修复了乱码等问题
package com.xeonmic.lbs.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.Map;
public class HttpRequestor {
private String charset = "utf-8";
private Integer connectTimeout = null;
private Integer socketTimeout = null;
private String proxyHost = null;
private Integer proxyPort = null;
/** * Do GET request * @param url * @return * @throws Exception * @throws IOException */
public String doGet(String url) throws Exception {
URL localURL = new URL(url);
URLConnection connection = openConnection(localURL);
HttpURLConnection httpURLConnection = (HttpURLConnection)connection;
httpURLConnection.setRequestProperty("Accept-Charset", charset);
httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
InputStream inputStream = null;
InputStreamReader inputStreamReader = null;
BufferedReader reader = null;
StringBuffer resultBuffer = new StringBuffer();
String tempLine = null;
// BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in,"UTF-8"));
if (httpURLConnection.getResponseCode() >= 300) {
throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());
}
try {
inputStream = httpURLConnection.getInputStream();
inputStreamReader = new InputStreamReader(inputStream,"UTF-8");
reader = new BufferedReader(inputStreamReader);
while ((tempLine = reader.readLine()) != null) {
resultBuffer.append(tempLine);
}
} finally {
if (reader != null) {
reader.close();
}
if (inputStreamReader != null) {
inputStreamReader.close();
}
if (inputStream != null) {
inputStream.close();
}
}
return resultBuffer.toString();
}
/** * Do POST request * @param url * @param parameterMap * @return * @throws Exception */
public String doPost(String url, Map<String,Object> parameterMap) throws Exception {
/* Translate parameter map to parameter date string */
StringBuffer parameterBuffer = new StringBuffer();
if (parameterMap != null) {
Iterator<String> iterator = parameterMap.keySet().iterator();
String key = null;
String value = null;
while (iterator.hasNext()) {
key = iterator.next();
if (parameterMap.get(key) != null) {
value =parameterMap.get(key).toString();
} else {
value = "";
}
parameterBuffer.append(key).append("=").append(value);
if (iterator.hasNext()) {
parameterBuffer.append("&");
}
}
}
System.out.println("POST parameter : " + parameterBuffer.toString());
URL localURL = new URL(url);
URLConnection connection = openConnection(localURL);
HttpURLConnection httpURLConnection = (HttpURLConnection)connection;
httpURLConnection.setDoOutput(true);
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setRequestProperty("Accept-Charset", charset);
httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
httpURLConnection.setRequestProperty("Content-Length", String.valueOf(parameterBuffer.length()));
OutputStream outputStream = null;
OutputStreamWriter outputStreamWriter = null;
InputStream inputStream = null;
InputStreamReader inputStreamReader = null;
BufferedReader reader = null;
StringBuffer resultBuffer = new StringBuffer();
String tempLine = null;
try {
outputStream = httpURLConnection.getOutputStream();
outputStreamWriter = new OutputStreamWriter(outputStream);
outputStreamWriter.write(parameterBuffer.toString());
outputStreamWriter.flush();
if (httpURLConnection.getResponseCode() >= 300) {
throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());
}
inputStream = httpURLConnection.getInputStream();
// inputStreamReader = new InputStreamReader(inputStream);
inputStreamReader = new InputStreamReader(inputStream,"utf-8");
reader = new BufferedReader(inputStreamReader);
while ((tempLine = reader.readLine()) != null) {
resultBuffer.append(tempLine);
}
} finally {
if (outputStreamWriter != null) {
outputStreamWriter.close();
}
if (outputStream != null) {
outputStream.close();
}
if (reader != null) {
reader.close();
}
if (inputStreamReader != null) {
inputStreamReader.close();
}
if (inputStream != null) {
inputStream.close();
}
}
return resultBuffer.toString();
}
private URLConnection openConnection(URL localURL) throws IOException {
URLConnection connection;
if (proxyHost != null && proxyPort != null) {
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));
connection = localURL.openConnection(proxy);
} else {
connection = localURL.openConnection();
}
return connection;
}
/** * Render request according setting * @param request */
private void renderRequest(URLConnection connection) {
if (connectTimeout != null) {
connection.setConnectTimeout(connectTimeout);
}
if (socketTimeout != null) {
connection.setReadTimeout(socketTimeout);
}
}
/* * Getter & Setter */
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 String getProxyHost() {
return proxyHost;
}
public void setProxyHost(String proxyHost) {
this.proxyHost = proxyHost;
}
public Integer getProxyPort() {
return proxyPort;
}
public void setProxyPort(Integer proxyPort) {
this.proxyPort = proxyPort;
}
public String getCharset() {
return charset;
}
public void setCharset(String charset) {
this.charset = charset;
}
}编写一个测试类分别测试GET和POST方法
package com.xeonmic.text;
import java.util.HashMap;
import java.util.Map;
import com.xeonmic.lbs.util.HttpRequestor;
/** * @author XeonM * @version 3.0 */
public class httpTest {
public static void main(String[] args) throws Exception {
/* Post Request */
Map<String,Object> dataMap = new HashMap<String,Object>();
dataMap.put("ak", "YourKey");
dataMap.put("geotable_id", "YourTableId");
dataMap.put("latitude", 28.5555);
dataMap.put("longitude", 115.555);
dataMap.put("coord_type", 1);
dataMap.put("title", "title");
System.out.println(new HttpRequestor().doPost("http://api.map.baidu.com/geodata/v3/poi/create", dataMap));
/* Get Request */
System.out.println(new HttpRequestor().doGet("http://api.map.baidu.com/geodata/v3/poi/list?geotable_id=YourTableId&ak=YourKey"));
}
}
运行结果：
POST parameter : ak=YourKey&coord_type=1&title=title&geotable_id=YourTableId&longitude=115.555&latitude=28.5555
{"status":0,"id":1536459136,"message":"\u6210\u529f"}
{"status":0,"size":3,"total":3,"pois":[{"title":"\u963f\u8428\u5fb7\u554a","location":[115.56640247684,28.558452229427],"city":"\u5b9c\u6625\u5e02","create_time":"2015-06-02 12:25:35","geotable_id":105115,"address":"\u6309\u65f6","province":"\u6c5f\u897f\u7701","district":"\u9ad8\u5b89\u5e02","city_id":278,"id":905313705},{"title":"\u4eca\u5929","location":[115.56640247684,28.558452229427],"city":"\u5b9c\u6625\u5e02","create_time":"2015-06-02 06:40:28","geotable_id":105115,"province":"\u6c5f\u897f\u7701","district":"\u9ad8\u5b89\u5e02","city_id":278,"id":904395000},{"title":"\u4e2d\u6587","location":[115.56640247684,28.558452229427],"city":"\u5b9c\u6625\u5e02","create_time":"2015-06-02 06:17:35","geotable_id":105115,"province":"\u6c5f\u897f\u7701","district":"\u9ad8\u5b89\u5e02","city_id":278,"id":904382413}],"message":"\u6210\u529f"}
status=0 代表成功；测试请将代码中YourKey改为你所申请的密钥 将YourTableId改为你API控制台中对应的表ID 如不清楚请见我的其他文章
附录2：控制服务返回码定义
| 状态码 | 定义 | 注释 |
|---|---|---|
| 0 | 正常 | |
| 1 | 服务器内部错误 | 该服务响应超时或系统内部错误，请留下联系方式 |
| 10 | 上传内容超过8M | Post上传数据不能超过8M |
| 101 | AK参数不存在 | 请求消息没有携带AK参数 |
| 102 | MCODE参数不存在，mobile类型mcode参数必需 | 对于Mobile类型的应用请求需要携带mcode参数，该错误码代表服务器没有解析到mcode |
| 200 | APP不存在，AK有误请检查再重试 | 根据请求的ak，找不到对应的APP |
| 201 | APP被用户自己禁用，请在控制台解禁 | |
| 202 | APP被管理员删除 | 恶意APP被管理员删除 |
| 203 | APP类型错误 | 当前API控制台支持Server(类型1), Mobile(类型2, 新版控制台区分为Mobile_Android(类型21)及Mobile_IPhone（类型22））及Browser（类型3），除此之外其他类型认为是APP类型错误 |
| 210 | APP IP校验失败 | 在申请SERVER类型应用的时候选择IP校验，需要填写IP白名单，如果当前请求的IP地址不在IP白名单或者不是0.0.0.0/0就认为IP校验失败 |
| 211 | APP SN校验失败 | SERVER类型APP有两种校验方式IP校验和SN校验，当用户请求的SN和服务端计算出来的SN不相等的时候提示SN校验失败 |
| 220 | APP Referer校验失败 | 浏览器类型的APP会校验referer字段是否存且切在referer白名单里面，否则返回该错误码 |
| 230 | APP Mcode码校验失败 | 服务器能解析到mcode，但和数据库中不一致，请携带正确的mcode |
| 240 | APP 服务被禁用 | 用户在API控制台中创建或设置某APP的时候禁用了某项服务 |
| 250 | 用户不存在 | 根据请求的user_id, 数据库中找不到该用户的信息，请携带正确的user_id |
| 251 | 用户被自己删除 | 该用户处于未激活状态 |
| 252 | 用户被管理员删除 | 恶意用户被加入黑名单 |
| 260 | 服务不存在 | 服务器解析不到用户请求的服务名称 |
| 261 | 服务被禁用 | 该服务已下线 |
| 301 | 永久配额超限，限制访问 | 配额超限，如果想增加配额请联系我们 |
| 302 | 天配额超限，限制访问 | 配额超限，如果想增加配额请联系我们 |
| 401 | 当前并发量已经超过约定并发配额，限制访问 | 并发控制超限，请控制并发量或联系我们 |
| 402 | 当前并发量已经超过约定并发配额，并且服务总并发量也已经超过设定的总并发配额，限制访问 | 并发控制超限，请控制并发量或联系我们 |