HttpUtil
package com.xyy.utils;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
public class HttpUtil {
/**
* http请求的get方式
*
* @param http
* @return
*/
public static String get(String http) {
String result = null;
try {
URL url = new URL(http);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
if (conn.getResponseCode() == 200) {
// 获取服务器端返回内容的输入流
InputStream in = conn.getInputStream();
// 创建内容输出流(作用是临时存储内容然后转为byte数组)
ByteArrayOutputStream dataOut = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int num;
while ((num = in.read(buffer)) != -1) {
dataOut.write(buffer, 0, num);
}
dataOut.flush();
result = new String(dataOut.toByteArray());
dataOut.close();
in.close();
}
conn.disconnect();
} catch (Exception e) {
}
return result;
}
/**
* http的post请求
*
* @param http 请求地址
* @param map 请求参数列表
* @return
*/
public static String post(String http, Map<String, String> map) {
String result = null;
try {
URL url = new URL(http);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setConnectTimeout(30000);
// 设置请求方式为post
conn.setRequestMethod("POST");
conn.connect();
if (map != null) {
// 提交参数
StringBuffer sb = new StringBuffer();
Iterator<Entry<String, String>> it = map.entrySet().iterator();
while (it.hasNext()) {
Entry<String, String> entry = it.next();
sb.append(entry.getKey()).append("=")
.append(entry.getValue()).append("&");
}
// 将最后一个&去掉
sb.delete(sb.length() - 1, sb.length());
String par = sb.toString();
OutputStreamWriter out = new OutputStreamWriter(
conn.getOutputStream(), "UTF-8");
out.write(par);
out.flush();
out.close();
}
// 判断是否连接成功
if (conn.getResponseCode() == 200) {
InputStream in = conn.getInputStream();
ByteArrayOutputStream dataOut = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int num;
while ((num = in.read(buffer)) != -1) {
dataOut.write(buffer, 0, num);
}
dataOut.flush();
result = new String(dataOut.toByteArray());
in.close();
dataOut.close();
}
conn.disconnect();
} catch (Exception e) {
}
return result;
}
public static String post(String actionUrl, Map<String, String> params,
Map<String, File> files) {
return post(actionUrl, params, files, null);
}
// 上传代码，第一个参数，为要使用的URL，第二个参数，为表单内容，第三个参数为要上传的文件，可以上传多个文件
public static String post(String actionUrl, Map<String, String> params,
Map<String, File> files, OnUploadListener l) {
if (null == files) {
return post(actionUrl, params);
}
String result = null;
try {
// 将内容以二进制流形式提交到服务器(需要服务器单独解析)
String BOUNDARY = java.util.UUID.randomUUID().toString();
String PREFIX = "--", LINEND = "\r\n";
String MULTIPART_FROM_DATA = "multipart/form-data";
String CHARSET = "UTF-8";
URL uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
// 读取超时的设置
conn.setReadTimeout(5 * 1000);
conn.setDoInput(true);// 允许输入
conn.setDoOutput(true);// 允许输出
conn.setUseCaches(false);
conn.setRequestMethod("POST"); // Post方式
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Charsert", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA
+ ";boundary=" + BOUNDARY);
// 组装文本类型参数列表
StringBuilder sb = new StringBuilder();
if (null != params) {
for (Map.Entry<String, String> entry : params.entrySet()) {
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINEND);
// 传递文本参数的key部分
sb.append("Content-Disposition: form-data; name=\""
+ entry.getKey() + "\"" + LINEND);
sb.append("Content-Type: text/plain; charset=" + CHARSET
+ LINEND);
sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
sb.append(LINEND);
// 传递文本参数的value部分
sb.append(entry.getValue());
sb.append(LINEND);
}
}
DataOutputStream outStream = new DataOutputStream(
conn.getOutputStream());
outStream.write(sb.toString().getBytes());
// 发送文件数据
if (files != null) {
int totalSize = 0;
int currentSize = 0;
for (Map.Entry<String, File> file : files.entrySet()) {
totalSize += file.getValue().length();
}
for (Map.Entry<String, File> file : files.entrySet()) {
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""
+ file.getKey() + "\"" + LINEND);
sb1.append("Content-Type: multipart/form-data; charset="
+ CHARSET + LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());
InputStream is = new FileInputStream(file.getValue());
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
// 上传进度的计算
currentSize += len;
if (null != l) {
l.onProgress(currentSize, totalSize);
}
}
is.close();
outStream.write(LINEND.getBytes());
}
}
// 请求结束标志
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
outStream.write(end_data);
outStream.flush();
// 判断是否连接成功
if (conn.getResponseCode() == 200) {
InputStream in = conn.getInputStream();
ByteArrayOutputStream dataOut = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int num;
while ((num = in.read(buffer)) != -1) {
dataOut.write(buffer, 0, num);
}
dataOut.flush();
result = new String(dataOut.toByteArray());
in.close();
dataOut.close();
}
conn.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
public interface OnUploadListener {
void onProgress(int current, int total);
}
}
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