Java用HttpClient3发送Get和Post请求(增强)

 

使用的是：HttpClient 3.1，这个比java自带的URLConnection稳定。

带字符编码设置，系统对应的换行。

Java代码  

1. import java.io.BufferedReader;  
2. import java.io.IOException;  
3. import java.io.InputStreamReader;  
4. import java.util.HashMap;  
5. import java.util.Map;  
6.   
7. import org.apache.commons.httpclient.HttpClient;  
8. import org.apache.commons.httpclient.HttpMethod;  
9. import org.apache.commons.httpclient.HttpStatus;  
10. import org.apache.commons.httpclient.URIException;  
11. import org.apache.commons.httpclient.methods.GetMethod;  
12. import org.apache.commons.httpclient.methods.PostMethod;  
13. import org.apache.commons.httpclient.params.HttpMethodParams;  
14. import org.apache.commons.httpclient.util.URIUtil;  
15. import org.apache.commons.lang.StringUtils;  
16. import org.apache.commons.logging.Log;  
17. import org.apache.commons.logging.LogFactory;  
18.   
19. /**  
20. * HTTP工具类  
21. *  
22. * @author happyqing 2015-4-20 
23. */   
24. public final class HttpUtil {   
25.         private static Log log = LogFactory.getLog(HttpUtil.class);   
26.   
27.         /**  
28.          * 执行一个HTTP GET请求，返回请求响应的HTML  
29.          *  
30.          * @param url                 请求的URL地址  
31.          * @param queryString 请求的查询参数,可以为null  
32.          * @param charset         字符集  
33.          * @param pretty            是否美化  
34.          * @return 返回请求响应的HTML  
35.          */   
36.         public static String doGet(String url, String queryString, String charset, boolean pretty) {   
37.                 StringBuffer response = new StringBuffer();   
38.                 HttpClient client = new HttpClient();   
39.                 HttpMethod method = new GetMethod(url);   
40.                 try {   
41.                         if (StringUtils.isNotBlank(queryString))   
42.                                 //对get请求参数做了http请求默认编码，好像没有任何问题，汉字编码后，就成为%式样的字符串   
43.                                 method.setQueryString(URIUtil.encodeQuery(queryString));   
44.                         client.executeMethod(method);   
45.                         if (method.getStatusCode() == HttpStatus.SC_OK) {   
46.                                 BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset));   
47.                                 String line;   
48.                                 while ((line = reader.readLine()) != null) {   
49.                                         if (pretty)   
50.                                                 response.append(line).append(System.getProperty("line.separator"));   
51.                                         else   
52.                                                 response.append(line);   
53.                                 }   
54.                                 reader.close();   
55.                         }   
56.                 } catch (URIException e) {   
57.                         log.error("执行HTTP Get请求时，编码查询字符串“" + queryString + "”发生异常！", e);   
58.                 } catch (IOException e) {   
59.                         log.error("执行HTTP Get请求" + url + "时，发生异常！", e);   
60.                 } finally {   
61.                         method.releaseConnection();   
62.                 }   
63.                 return response.toString();   
64.         }   
65.   
66.         /**  
67.          * 执行一个HTTP POST请求，返回请求响应的HTML  
68.          *  
69.          * @param url         请求的URL地址  
70.          * @param params    请求的查询参数,可以为null  
71.          * @param charset 字符集  
72.          * @param pretty    是否美化  
73.          * @return 返回请求响应的HTML  
74.          */   
75.         public static String doPost(String url, Map<String, String> params, String charset, boolean pretty) {   
76.                 StringBuffer response = new StringBuffer();   
77.                 HttpClient client = new HttpClient();   
78.                 PostMethod method = new PostMethod(url);   
79.         //设置参数的字符集  
80.         method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,charset);  
81.                 //设置Http Post数据   
82.                 if (params != null) {   
83.                         //HttpMethodParams p = new HttpMethodParams();   
84.                         for (Map.Entry<String, String> entry : params.entrySet()) {   
85.                                 //p.setParameter(entry.getKey(), entry.getValue());  
86.                                 method.setParameter(entry.getKey(), entry.getValue());  
87.                         }   
88.                         //method.setParams(p);   
89.                 }   
90.                 try {   
91.                         client.executeMethod(method);   
92.                         if (method.getStatusCode() == HttpStatus.SC_OK) {   
93.                                 BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset));   
94.                                 String line;   
95.                                 while ((line = reader.readLine()) != null) {   
96.                                         if (pretty)   
97.                                                 response.append(line).append(System.getProperty("line.separator"));   
98.                                         else   
99.                                                 response.append(line);   
100.                                 }   
101.                                 reader.close();   
102.                         }   
103.                 } catch (IOException e) {   
104.                         log.error("执行HTTP Post请求" + url + "时，发生异常！", e);   
105.                 } finally {   
106.                         method.releaseConnection();   
107.                 }   
108.                 return response.toString();   
109.         }   
110.   
111.         public static void main(String[] args) {   
112.                 String y = doGet("http://video.sina.com.cn/life/tips.html", null, "GBK", true);  
113.                 System.out.println(y);  
114. //              Map params = new HashMap();  
115. //              params.put("param1", "value1");  
116. //              params.put("json", "{\"aa\":\"11\"}");  
117. //                String j = doPost("http://localhost/uplat/manage/test.do?reqCode=add", params, "UTF-8", true);  
118. //                System.out.println(j);  
119.         }   
120. }  

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.util.HashMap;import java.util.Map;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.HttpMethod;import org.apache.commons.httpclient.HttpStatus;import org.apache.commons.httpclient.URIException;import org.apache.commons.httpclient.methods.GetMethod;import org.apache.commons.httpclient.methods.PostMethod;import org.apache.commons.httpclient.params.HttpMethodParams;import org.apache.commons.httpclient.util.URIUtil;import org.apache.commons.lang.StringUtils;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;/** * HTTP工具类 * * @author happyqing 2015-4-20*/ public final class HttpUtil {         private static Log log = LogFactory.getLog(HttpUtil.class);         /**          * 执行一个HTTP GET请求，返回请求响应的HTML          *          * @param url                 请求的URL地址          * @param queryString 请求的查询参数,可以为null          * @param charset         字符集          * @param pretty            是否美化          * @return 返回请求响应的HTML          */         public static String doGet(String url, String queryString, String charset, boolean pretty) {                 StringBuffer response = new StringBuffer();                 HttpClient client = new HttpClient();                 HttpMethod method = new GetMethod(url);                 try {                         if (StringUtils.isNotBlank(queryString))                                 //对get请求参数做了http请求默认编码，好像没有任何问题，汉字编码后，就成为%式样的字符串                                 method.setQueryString(URIUtil.encodeQuery(queryString));                         client.executeMethod(method);                         if (method.getStatusCode() == HttpStatus.SC_OK) {                                 BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset));                                 String line;                                 while ((line = reader.readLine()) != null) {                                         if (pretty)                                                 response.append(line).append(System.getProperty("line.separator"));                                         else                                                 response.append(line);                                 }                                 reader.close();                         }                 } catch (URIException e) {                         log.error("执行HTTP Get请求时，编码查询字符串“" + queryString + "”发生异常！", e);                 } catch (IOException e) {                         log.error("执行HTTP Get请求" + url + "时，发生异常！", e);                 } finally {                         method.releaseConnection();                 }                 return response.toString();         }         /**          * 执行一个HTTP POST请求，返回请求响应的HTML          *          * @param url         请求的URL地址          * @param params    请求的查询参数,可以为null          * @param charset 字符集          * @param pretty    是否美化          * @return 返回请求响应的HTML          */         public static String doPost(String url, Map<String, String> params, String charset, boolean pretty) {                 StringBuffer response = new StringBuffer();                 HttpClient client = new HttpClient();                 PostMethod method = new PostMethod(url); //设置参数的字符集method.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,charset);                //设置Http Post数据                 if (params != null) {                         //HttpMethodParams p = new HttpMethodParams();                         for (Map.Entry<String, String> entry : params.entrySet()) {                                 //p.setParameter(entry.getKey(), entry.getValue());                        method.setParameter(entry.getKey(), entry.getValue());                        }                         //method.setParams(p);                 }                 try {                         client.executeMethod(method);                         if (method.getStatusCode() == HttpStatus.SC_OK) {                                 BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset));                                 String line;                                 while ((line = reader.readLine()) != null) {                                         if (pretty)                                                 response.append(line).append(System.getProperty("line.separator"));                                         else                                                 response.append(line);                                 }                                 reader.close();                         }                 } catch (IOException e) {                         log.error("执行HTTP Post请求" + url + "时，发生异常！", e);                 } finally {                         method.releaseConnection();                 }                 return response.toString();         }         public static void main(String[] args) {                 String y = doGet("http://video.sina.com.cn/life/tips.html", null, "GBK", true);                System.out.println(y);//        Map params = new HashMap();//        params.put("param1", "value1");//        params.put("json", "{\"aa\":\"11\"}");//                String j = doPost("http://localhost/uplat/manage/test.do?reqCode=add", params, "UTF-8", true);//                System.out.println(j);        } }

 

参考：

http://lavasoft.blog.51cto.com/62575/175911/

 

Java用HttpClient3发送Https的Get和Post请求(增强)

http://happyqing.iteye.com/blog/2266742