feat(net): 添加 HttpTool 类并实现 POST 请求功能

- 新增 HttpTool 类，提供 HTTP POST 请求的工具方法
- 实现了对 HTTPS 的支持，并添加了信任所有主机的功能
- 添加了请求头和请求体的处理
- 编写了单元测试用例，验证 HTTP 请求功能

src/main/java/com/xxl/tool/net/HttpTool.java

@@ -0,0 +1,171 @@
+package com.xxl.tool.net;
+
+import com.xxl.tool.core.MapTool;
+import com.xxl.tool.core.StringTool;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.net.ssl.*;
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+import java.util.Map;
+
+/**
+ * @author xuxueli 2018-11-25 00:55:31
+ */
+public class HttpTool {
+    private static Logger logger = LoggerFactory.getLogger(HttpTool.class);
+
+
+    // trust-https start
+    private static void trustAllHosts(HttpsURLConnection connection) {
+        try {
+            SSLContext sc = SSLContext.getInstance("TLS");
+            sc.init(null, trustAllCerts, new java.security.SecureRandom());
+            SSLSocketFactory newFactory = sc.getSocketFactory();
+
+            connection.setSSLSocketFactory(newFactory);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+        }
+        connection.setHostnameVerifier(new HostnameVerifier() {
+            @Override
+            public boolean verify(String hostname, SSLSession session) {
+                return true;
+            }
+        });
+    }
+    private static final TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
+        @Override
+        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
+            return new java.security.cert.X509Certificate[]{};
+        }
+        @Override
+        public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
+        }
+        @Override
+        public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
+        }
+    }};
+    // trust-https end
+
+
+    // ---------------------- tool ----------------------
+
+    /**
+     * post
+     *
+     * @param url
+     * @param requestBody
+     * @param timeout
+     * @return
+     */
+    public static String postBody(String url,
+                                  String requestBody,
+                                  int timeout) {
+        return postBody(url, requestBody, null, timeout);
+    }
+
+    /**
+     * post
+     *
+     * @param url
+     * @param requestBody
+     * @param headers
+     * @param timeout
+     * @return
+     */
+    public static String postBody(String url,
+                                  String requestBody,
+                                  Map<String, String> headers,
+                                  int timeout) {
+
+        HttpURLConnection connection = null;
+        BufferedReader bufferedReader = null;
+        try {
+            // connection
+            URL realUrl = new URL(url);
+            connection = (HttpURLConnection) realUrl.openConnection();
+
+            // trust-https
+            boolean useHttps = url.startsWith("https");
+            if (useHttps) {
+                HttpsURLConnection https = (HttpsURLConnection) connection;
+                trustAllHosts(https);
+            }
+
+            // connection setting
+            connection.setRequestMethod("POST");
+            connection.setDoOutput(true);
+            connection.setDoInput(true);
+            connection.setUseCaches(false);
+            connection.setReadTimeout(timeout * 1000);
+            connection.setConnectTimeout(3 * 1000);
+            connection.setRequestProperty("connection", "Keep-Alive");
+            connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
+            connection.setRequestProperty("Accept-Charset", "application/json;charset=UTF-8");
+
+            // header setting
+            if(MapTool.isNotEmpty(headers)){
+                for (String key : headers.keySet()) {
+                    connection.setRequestProperty(key, headers.get(key));
+                }
+            }
+
+            // do connection
+            connection.connect();
+
+            // write requestBody
+            if (StringTool.isNotBlank(requestBody)) {
+                DataOutputStream dataOutputStream = new DataOutputStream(connection.getOutputStream());
+                dataOutputStream.write(requestBody.getBytes("UTF-8"));
+                dataOutputStream.flush();
+                dataOutputStream.close();
+            }
+
+            /*byte[] requestBodyBytes = requestBody.getBytes("UTF-8");
+            connection.setRequestProperty("Content-Length", String.valueOf(requestBodyBytes.length));
+            OutputStream outwritestream = connection.getOutputStream();
+            outwritestream.write(requestBodyBytes);
+            outwritestream.flush();
+            outwritestream.close();*/
+
+            // valid StatusCode
+            int statusCode = connection.getResponseCode();
+            if (statusCode != 200) {
+                throw new RuntimeException("StatusCode("+ statusCode +") invalid. for url : " + url);
+            }
+
+            // result
+            bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
+            StringBuilder result = new StringBuilder();
+            String line;
+            while ((line = bufferedReader.readLine()) != null) {
+                result.append(line);
+            }
+            String responseBody = result.toString();
+
+            // parse returnT
+            return responseBody;
+        } catch (Exception e) {
+            throw new RuntimeException("Http Request Error ("+ e.getMessage() +"). for url : " + url);
+        } finally {
+            try {
+                if (bufferedReader != null) {
+                    bufferedReader.close();
+                }
+                if (connection != null) {
+                    connection.disconnect();
+                }
+            } catch (Exception e2) {
+                logger.error(e2.getMessage(), e2);
+            }
+        }
+    }
+
+}

src/test/java/com/xxl/tool/test/json/BasicJsonToolTest.java

@@ -1,14 +1,16 @@
 package com.xxl.tool.test.json;
 
 import com.xxl.tool.json.BasicJsonTool;
+import org.junit.jupiter.api.Test;
 
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 
 public class BasicJsonToolTest {
 
-    public static void main(String[] args) {
+    @Test
+    public void test() {
         Map<String, Object> result = new HashMap<>();
         result.put("int", 200);
         result.put("str", "success");

src/test/java/com/xxl/tool/test/net/HttpToolTest.java

@@ -0,0 +1,17 @@
+package com.xxl.tool.test.net;
+
+import com.xxl.tool.net.HttpTool;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class HttpToolTest {
+    private static final Logger logger = LoggerFactory.getLogger(HttpToolTest.class);
+
+    @Test
+    public void test() {
+        String resp = HttpTool.postBody("http://www.baidu.com/", "hello world", 3000);
+        logger.info(resp);
+    }
+
+}