93 lines
2.7 KiB
Java
93 lines
2.7 KiB
Java
package com.peanut.common.utils;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.HttpURLConnection;
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import java.net.URLEncoder;
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public class ConnUtil {
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/**
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* UrlEncode， UTF-8 编码
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*
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* @param str
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* 原始字符串
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* @return
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*/
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public static String urlEncode(String str) {
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String result = null;
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try {
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result = URLEncoder.encode(str, "UTF-8");
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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return result;
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}
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/**
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* 从HttpURLConnection 获取返回的字符串
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*
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* @param conn
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* @return
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* @throws IOException
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* @throws DemoException
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*/
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public static String getResponseString(HttpURLConnection conn) throws IOException, DemoException {
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return new String(getResponseBytes(conn));
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}
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/**
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* 从HttpURLConnection 获取返回的bytes 注意 HttpURLConnection自身问题，
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* 400类错误，会直接抛出异常。不能获取conn.getInputStream();
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*
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* @param conn
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* @return
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* @throws IOException
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* http请求错误
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* @throws DemoException
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* http 的状态码不是 200
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*/
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public static byte[] getResponseBytes(HttpURLConnection conn) throws IOException, DemoException {
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int responseCode = conn.getResponseCode();
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if (responseCode != 200) {
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System.err.println("http 请求返回的状态码错误，期望200， 当前是 " + responseCode);
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if (responseCode == 401) {
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System.err.println("可能是appkey appSecret 填错");
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}
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throw new DemoException("http response code is" + responseCode);
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}
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InputStream inputStream = conn.getInputStream();
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byte[] result = getInputStreamContent(inputStream);
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return result;
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}
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/**
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* 将InputStream内的内容全部读取，作为bytes返回
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*
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* @param is
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* @return
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* @throws IOException
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* @see InputStream.read()
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*/
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public static byte[] getInputStreamContent(InputStream is) throws IOException {
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byte[] b = new byte[1024];
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// 定义一个输出流存储接收到的数据
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ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
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// 开始接收数据
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int len = 0;
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while (true) {
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len = is.read(b);
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if (len == -1) {
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// 数据读完
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break;
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}
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byteArrayOutputStream.write(b, 0, len);
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}
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return byteArrayOutputStream.toByteArray();
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}
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}
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