HttpUrlConnection与HttpClient的认识（四） -HttpClient的封装

来源：互联网发布：php吧编辑：程序博客网时间：2024/06/12 07:12

转载自：http://blog.csdn.net/u010248330/article/details/69372019

import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;
import org.apache.commons.httpclient.params.HttpMethodParams;
import java.io.*;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.zip.GZIPInputStream;

public class HttpClientUtil {

/**
* 使用post方式调用
* @param url 调用的URL
* @param values 传递的参数值List
* @param charSet设置内容的编码格式
* @return 调用得到的字符串
*/
public static String httpClientPost(String url,List<NameValuePair[]> values,String charSet){
StringBuilder sb =new StringBuilder();
HttpClient httpClient = new HttpClient();
PostMethod postMethod = new PostMethod(url);
//创建参数队列
for (NameValuePair[] value : values) {
postMethod.addParameters(value);
}
try {
httpClient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, charSet);
httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(3000);
httpClient.getHttpConnectionManager().getParams().setSoTimeout(3000);

int statusCode = httpClient.executeMethod(postMethod);
if(statusCode != 200){
return "";
}
//以流的行式读入，避免中文乱码
InputStream is = postMethod.getResponseBodyAsStream();
BufferedReader dis=new BufferedReader(new InputStreamReader(is,"utf-8"));
String str ="";
while((str =dis.readLine())!=null){
sb.append(str);
sb.append("\r\n"); // 换行
}
} catch (Exception e) {
e.printStackTrace();
}finally{
postMethod.releaseConnection();
}
return sb.toString();
}

/**
* 使用get方式调用
* @param url调用的URL
* @return 调用得到的字符串
*/
public static String httpClientGet(String url,String charSet){
StringBuilder sb =new StringBuilder();
HttpClient httpClient = new HttpClient();
GetMethod getMethod = new GetMethod(url);
getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,new DefaultHttpMethodRetryHandler());
try {
// 执行getMethod
httpClient.executeMethod(getMethod);
//以流的行式读入，避免中文乱码
InputStream is = getMethod.getResponseBodyAsStream();
BufferedReader dis=new BufferedReader(new InputStreamReader(is,charSet));
String str ="";
while((str =dis.readLine())!=null){
sb.append(str);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
// 关闭连接
getMethod.releaseConnection();
}
return sb.toString();
}

/**
* 将MAP转换成HTTP请求参数
* @param pairArr
* @return
*/
public static NameValuePair[] praseParameterMap(Map<String, String> map){

NameValuePair[] nvps = new NameValuePair[map.size()];

Set<String> keys = map.keySet();
int i=0;
for(String key:keys){
nvps[i] = new NameValuePair();
nvps[i].setName(key);
nvps[i].setValue(map.get(key));

i++;
}

return nvps;
}

/**
* 使用post方式调用
* @param url 调用的URL
* @param values 传递的参数值
* @param xml 传递的xml参数
* @return
*/
public static String httpClientPost(String url, NameValuePair[] values, String xml){
StringBuilder sb = new StringBuilder();
HttpClient client = new HttpClient();
client.getParams().setParameter(
HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");

PostMethod method = new PostMethod(url);
method.setQueryString(values);
method.addRequestHeader("Content-Type", "text/xml;charset=UTF-8");
RequestEntity reis = null;
InputStream input = null;
InputStream is = null;
BufferedReader dis = null;
try {
input = new ByteArrayInputStream(xml.getBytes("utf-8"));
reis = new InputStreamRequestEntity(input);
method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler());

method.setRequestEntity(reis);
client.executeMethod(method);

// 以流的行式读入，避免中文乱码
is = method.getResponseBodyAsStream();
dis = new BufferedReader(new InputStreamReader(is, "utf-8"));
String str = "";
while ((str = dis.readLine()) != null) {
sb.append(str);
}
} catch (HttpException ex) {
ex.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
method.releaseConnection();
try {
if (dis != null)
dis.close();
if (is != null)
is.close();
if (input != null)
input.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}

public static String httpGzipGet(String url,String charset){
HttpClient httpclient = new HttpClient();
GetMethod method = new GetMethod(url);
method.addRequestHeader("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.79 Safari/537.1");
method.addRequestHeader("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
method.addRequestHeader("Accept-Encoding", "gzip,deflate,sdch");//gzip解压缩必须属性
InputStream in = null;
GZIPInputStream gzin = null;
InputStreamReader isr = null;
BufferedReader br = null;
try {
httpclient.executeMethod(method);
if(method.getStatusCode() == HttpStatus.SC_OK){
Header respHead = method.getResponseHeader("Content-Encoding");
if(respHead != null){
String contEncoding = respHead.getValue();
if(contEncoding != null && contEncoding.toLowerCase().indexOf("gzip") > -1){
in = method.getResponseBodyAsStream();
gzin = new GZIPInputStream(in);
isr = new InputStreamReader(gzin,charset);
br = new BufferedReader(isr);
String temp = "";
StringBuffer result = new StringBuffer();
if((temp = br.readLine()) != null){
result.append(temp);
}
return result.toString();
}else{
return httpClientGet(url,charset);
}
}else{
return null;
}
}else{

return null;
}
} catch (Exception e) {
e.printStackTrace();
return null;
} finally{
try{
if(br != null){
br.close();
br = null;
}
if(isr != null){
isr.close();
isr = null;
}
if(gzin != null){
gzin.close();
gzin = null;
}
if(in != null){
in.close();
in = null;
}
if(method != null){
method.releaseConnection();
method = null;
}
}catch(IOException e){
e.printStackTrace();
}

}
}

public static String httpClientPostJson(String url, String jsonStr){
if (jsonStr == null)
return null;
StringBuilder sb = new StringBuilder();
HttpClient httpClient = new HttpClient();
httpClient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(300);
httpClient.getHttpConnectionManager().getParams().setSoTimeout(700);
PostMethod postMethod = new PostMethod(url);
try {
StringRequestEntity entity = new StringRequestEntity(jsonStr, "application/json", "utf-8");
postMethod.setRequestEntity(entity);
int statusCode = httpClient.executeMethod(postMethod);
if (statusCode != 200) {
return "";
}
//以流的行式读入，避免中文乱码
InputStream is = postMethod.getResponseBodyAsStream();
BufferedReader dis = new BufferedReader(new InputStreamReader(is, "utf-8"));
String str;
while ((str = dis.readLine()) != null) {
sb.append(str);
}

} catch (Exception e) {
e.printStackTrace();
} finally {
postMethod.releaseConnection();
}
return sb.toString();
}

}

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