java http2_java实现HTTP请求（二）

packagecom.rhine.blog.http;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStream;importjava.io.InputStreamReader;importjava.io.UnsupportedEncodingException;importjava.util.Iterator;importjava.util.Map;importjava.util.Map.Entry;importjava.util.Set;importorg.apache.commons.httpclient.DefaultHttpMethodRetryHandler;importorg.apache.commons.httpclient.HttpClient;importorg.apache.commons.httpclient.HttpStatus;importorg.apache.commons.httpclient.NameValuePair;importorg.apache.commons.httpclient.methods.GetMethod;importorg.apache.commons.httpclient.methods.PostMethod;importorg.apache.commons.httpclient.params.HttpMethodParams;public classHttpClient3 {public staticString sendByGet(String url) {

InputStream is= null;

BufferedReader br= null;

String result= null;

HttpClient httpClient= new HttpClient();//创建httpClient实例//先获取连接管理器对象，再获取参数对象,再进行参数的赋值

httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);//设置http连接主机服务超时时间：15000毫秒

GetMethod getMethod = new GetMethod(url);//创建一个Get方法实例对象

getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);//设置get请求超时为60000毫秒//设置请求重试机制，默认重试次数：3次，参数设置为true，重试机制可用，false相反

getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler(3, true));try{int statusCode = httpClient.executeMethod(getMethod);//执行Get方法//判断返回码

if (statusCode != HttpStatus.SC_OK) {//如果状态码返回的不是ok,说明失败了,打印错误信息

System.err.println("Method faild: " +getMethod.getStatusLine());

}else{

is= getMethod.getResponseBodyAsStream();//通过getMethod实例，获取远程的一个输入流

br = new BufferedReader(new InputStreamReader(is, "UTF-8"));//包装输入流

StringBuffer sbf = newStringBuffer();

String temp= null;//读取封装的输入流

while ((temp = br.readLine()) != null) {

sbf.append(temp).append("\r\n");

}

result=sbf.toString();

}

}catch(IOException e) {

e.printStackTrace();

}finally{//关闭资源

if (null !=br) {try{

br.close();

}catch(IOException e) {

e.printStackTrace();

}

}if (null !=is) {try{

is.close();

}catch(IOException e) {

e.printStackTrace();

}

}//释放连接

getMethod.releaseConnection();

}returnresult;

}public static String sendByPost(String url, MapparamMap) {

InputStream is= null;//获取输入流

BufferedReader br = null;

String result= null;

HttpClient httpClient= new HttpClient();//创建httpClient实例对象

httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);//设置httpClient连接主机服务器超时时间：15000毫秒

PostMethod postMethod = new PostMethod(url);//创建post请求方法实例对象

postMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);//设置post请求超时时间

NameValuePair[] nvp = null;//判断参数map集合paramMap是否为空

if (null != paramMap && paramMap.size() > 0) {//不为空

nvp = new NameValuePair[paramMap.size()];//创建键值参数对象数组，大小为参数的个数

Set> entrySet = paramMap.entrySet();//循环遍历参数集合map

Iterator> iterator = entrySet.iterator();//获取迭代器

int index = 0;while(iterator.hasNext()) {

Entry mapEntry =iterator.next();//从mapEntry中获取key和value创建键值对象存放到数组中

try{

nvp[index]= new NameValuePair(mapEntry.getKey(),new String(mapEntry.getValue().toString().getBytes("UTF-8"), "UTF-8"));

}catch(UnsupportedEncodingException e) {

e.printStackTrace();

}

index++;

}

}if (null != nvp && nvp.length > 0) {//判断nvp数组是否为空

postMethod.setRequestBody(nvp);//将参数存放到requestBody对象中

}try{int statusCode =httpClient.executeMethod(postMethod);if (statusCode != HttpStatus.SC_OK) {//判断是否成功

System.err.println("Method faild: " +postMethod.getStatusLine());

}

is= postMethod.getResponseBodyAsStream();//获取远程返回的数据

br = new BufferedReader(new InputStreamReader(is, "UTF-8"));//封装输入流

StringBuffer sbf = newStringBuffer();

String temp= null;while ((temp = br.readLine()) != null) {

sbf.append(temp).append("\r\n");

}

result=sbf.toString();

}catch(IOException e) {

e.printStackTrace();

}finally{if (null !=br) {try{

br.close();

}catch(IOException e) {

e.printStackTrace();

}

}if (null !=is) {try{

is.close();

}catch(IOException e) {

e.printStackTrace();

}

}

postMethod.releaseConnection();//释放连接

}returnresult;

}

}