Http请求工具类(Java原生Form+Json)
package com.tzx.cc.common.constant.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLEncoder;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Map;
import java.util.Set;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.commons.lang.StringUtils;
/**
* http请求工具类
*
* @author zhangyong
*
*/
public class HttpUtils {
private final String CTYPE_FORM = "application/x-www-form-urlencoded;charset=utf-8";
private final String CTYPE_JSON = "application/json; charset=utf-8";
private final String charset = "utf-8";
private static HttpUtils instance = null;
public static HttpUtils getInstance() {
if (instance == null) {
return new HttpUtils();
}
return instance;
}
private class DefaultTrustManager implements X509TrustManager {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
}
public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
}
}
/**
* 以application/json; charset=utf-8方式传输
*
* @param url
* @param requestContent
* @return
* @throws SocketTimeoutException
* @throws IOException
*/
public String postJson(String url, String jsonContent)
throws SocketTimeoutException, IOException {
return doRequest("POST", url, jsonContent, 15000, 15000, CTYPE_JSON,
null);
}
/**
* POST 以application/x-www-form-urlencoded;charset=utf-8方式传输
*
* @param url
* @param requestContent
* @return
* @throws SocketTimeoutException
* @throws IOException
*/
public String postForm(String url) throws SocketTimeoutException,
IOException {
return doRequest("POST", url, "", 15000, 15000, CTYPE_FORM, null);
}
/**
* POST 以application/x-www-form-urlencoded;charset=utf-8方式传输
*
* @param url
* @param requestContent
* @return
* @throws SocketTimeoutException
* @throws IOException
*/
public String postForm(String url, Map<String, String> params)
throws SocketTimeoutException, IOException {
return doRequest("POST", url, buildQuery(params), 15000, 15000,
CTYPE_FORM, null);
}
/**
* POST 以application/x-www-form-urlencoded;charset=utf-8方式传输
*
* @param url
* @param requestContent
* @return
* @throws SocketTimeoutException
* @throws IOException
*/
public String getForm(String url) throws SocketTimeoutException,
IOException {
return doRequest("GET", url, "", 15000, 15000, CTYPE_FORM, null);
}
/**
* POST 以application/x-www-form-urlencoded;charset=utf-8方式传输
*
* @param url
* @param requestContent
* @return
* @throws SocketTimeoutException
* @throws IOException
*/
public String getForm(String url, Map<String, String> params)
throws SocketTimeoutException, IOException {
return doRequest("GET", url, buildQuery(params), 15000, 15000,
CTYPE_FORM, null);
}
private String doRequest(String method, String url, String requestContent,
int connectTimeout, int readTimeout, String ctype,
Map<String, String> headerMap) throws SocketTimeoutException,
IOException {
HttpURLConnection conn = null;
OutputStream out = null;
String rsp = null;
try {
conn = getConnection(new URL(url), method, ctype, headerMap);
conn.setConnectTimeout(connectTimeout);
conn.setReadTimeout(readTimeout);
if(!StringUtils.isEmpty(requestContent)){
out = conn.getOutputStream();
out.write(requestContent.getBytes(charset));
}
rsp = getResponseAsString(conn);
} finally {
if (out != null) {
out.close();
}
if (conn != null) {
conn.disconnect();
}
conn = null;
}
return rsp;
}
private HttpURLConnection getConnection(URL url, String method,
String ctype, Map<String, String> headerMap) throws IOException {
HttpURLConnection conn;
if ("https".equals(url.getProtocol())) {
SSLContext ctx;
try {
ctx = SSLContext.getInstance("TLS");
ctx.init(new KeyManager[0],
new TrustManager[] { new DefaultTrustManager() },
new SecureRandom());
} catch (Exception e) {
throw new IOException(e);
}
HttpsURLConnection connHttps = (HttpsURLConnection) url
.openConnection();
connHttps.setSSLSocketFactory(ctx.getSocketFactory());
connHttps.setHostnameVerifier(new HostnameVerifier() {
public boolean verify(String hostname, SSLSession session) {
return true;
}
});
conn = connHttps;
} else {
conn = (HttpURLConnection) url.openConnection();
}
conn.setRequestMethod(method);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestProperty("Accept",
"text/xml,text/javascript,text/html,application/json");
conn.setRequestProperty("Content-Type", ctype);
if (headerMap != null) {
for (Map.Entry<String, String> entry : headerMap.entrySet()) {
conn.setRequestProperty(entry.getKey(), entry.getValue());
}
}
return conn;
}
private String getResponseAsString(HttpURLConnection conn)
throws IOException {
InputStream es = conn.getErrorStream();
if (es == null) {
return getStreamAsString(conn.getInputStream(), charset, conn);
} else {
String msg = getStreamAsString(es, charset, conn);
if (StringUtils.isEmpty(msg)) {
throw new IOException(conn.getResponseCode() + ":"
+ conn.getResponseMessage());
} else {
return msg;
}
}
}
private String getStreamAsString(InputStream stream, String charset,
HttpURLConnection conn) throws IOException {
try {
Reader reader = new InputStreamReader(stream, charset);
StringBuilder response = new StringBuilder();
final char[] buff = new char[1024];
int read = 0;
while ((read = reader.read(buff)) > 0) {
response.append(buff, 0, read);
}
return response.toString();
} finally {
if (stream != null) {
stream.close();
}
}
}
private String buildQuery(Map<String, String> params) throws IOException {
if (params == null || params.isEmpty()) {
return "";
}
StringBuilder query = new StringBuilder();
Set<Map.Entry<String, String>> entries = params.entrySet();
boolean hasParam = false;
for (Map.Entry<String, String> entry : entries) {
String name = entry.getKey();
String value = entry.getValue();
if (hasParam) {
query.append("&");
} else {
hasParam = true;
}
query.append(name).append("=")
.append(URLEncoder.encode(value, charset));
}
return query.toString();
}
}
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