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首頁 Java java教程 org.apache.httpcomponents:httpclient 工具類

org.apache.httpcomponents:httpclient 工具類

PHP中文网
PHP中文网
Jun 19, 2017 am 10:19 AM
httpclient ie 工具

基於httpclient 版本4.4.1

#因為http連線需要三次握手，在需要頻繁呼叫時浪費資源和時間

故採用連接池的方式連接

　　依實際需求變更  連線池最大連線數、路由最大連線數

　　另一個需要注意的是

 

　　　// 释放Socket流
     response.close();
     // 释放Connection
     // httpClient.close();<br><br>
登入後複製
<span style="color: #008080">  1</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.HttpEntity;
</span><span style="color: #008080">  2</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.NameValuePair;
</span><span style="color: #008080">  3</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.client.config.RequestConfig;
</span><span style="color: #008080">  4</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.client.entity.UrlEncodedFormEntity;
</span><span style="color: #008080">  5</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.client.methods.CloseableHttpResponse;
</span><span style="color: #008080">  6</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.client.methods.HttpGet;
</span><span style="color: #008080">  7</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.client.methods.HttpPost;
</span><span style="color: #008080">  8</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.client.methods.HttpRequestBase;
</span><span style="color: #008080">  9</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.client.utils.URIBuilder;
</span><span style="color: #008080"> 10</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.config.SocketConfig;
</span><span style="color: #008080"> 11</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.entity.StringEntity;
</span><span style="color: #008080"> 12</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.impl.client.CloseableHttpClient;
</span><span style="color: #008080"> 13</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.impl.client.HttpClients;
</span><span style="color: #008080"> 14</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
</span><span style="color: #008080"> 15</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.message.BasicNameValuePair;
</span><span style="color: #008080"> 16</span> <span style="color: #0000ff">import</span><span style="color: #000000"> org.apache.http.util.EntityUtils;
</span><span style="color: #008080"> 17</span> 
<span style="color: #008080"> 18</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.io.IOException;
</span><span style="color: #008080"> 19</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.io.UnsupportedEncodingException;
</span><span style="color: #008080"> 20</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.net.URISyntaxException;
</span><span style="color: #008080"> 21</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.util.ArrayList;
</span><span style="color: #008080"> 22</span> <span style="color: #0000ff">import</span><span style="color: #000000"> java.util.Map;
</span><span style="color: #008080"> 23</span> 
<span style="color: #008080"> 24</span> <span style="color: #008000">/**</span>
<span style="color: #008080"> 25</span> <span style="color: #008000"> * Created by lidada on 2017/6/9.
</span><span style="color: #008080"> 26</span>  <span style="color: #008000">*/</span>
<span style="color: #008080"> 27</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> HttpClientUtils {
</span><span style="color: #008080"> 28</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span><span style="color: #000000"> PoolingHttpClientConnectionManager cm;
</span><span style="color: #008080"> 29</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String EMPTY_STR = ""<span style="color: #000000">;
</span><span style="color: #008080"> 30</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String CONTENT_TYPE_UTF_8 = "UTF-8"<span style="color: #000000">;
</span><span style="color: #008080"> 31</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String CONTENT_TYPE_GBK = "GBK"<span style="color: #000000">;
</span><span style="color: #008080"> 32</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String CONTENT_TYPE_JSON = "application/json"<span style="color: #000000">;
</span><span style="color: #008080"> 33</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">final</span> <span style="color: #0000ff">int</span> CONNECTION_TIMEOUT_MS = 60000<span style="color: #000000">;
</span><span style="color: #008080"> 34</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">final</span> <span style="color: #0000ff">int</span> SO_TIMEOUT_MS = 60000<span style="color: #000000">;
</span><span style="color: #008080"> 35</span> 
<span style="color: #008080"> 36</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">void</span><span style="color: #000000"> init() {
</span><span style="color: #008080"> 37</span>         <span style="color: #0000ff">if</span> (cm == <span style="color: #0000ff">null</span><span style="color: #000000">) {
</span><span style="color: #008080"> 38</span>             cm = <span style="color: #0000ff">new</span><span style="color: #000000"> PoolingHttpClientConnectionManager();
</span><span style="color: #008080"> 39</span>             cm.setMaxTotal(50);<span style="color: #008000">//</span><span style="color: #008000"> 整个连接池最大连接数</span>
<span style="color: #008080"> 40</span>             cm.setDefaultMaxPerRoute(5);<span style="color: #008000">//</span><span style="color: #008000"> 每路由最大连接数，默认值是2</span>
<span style="color: #008080"> 41</span>             SocketConfig sc =<span style="color: #000000"> SocketConfig.custom().setSoTimeout(SO_TIMEOUT_MS).build();
</span><span style="color: #008080"> 42</span> <span style="color: #000000">            cm.setDefaultSocketConfig(sc);
</span><span style="color: #008080"> 43</span> <span style="color: #000000">        }
</span><span style="color: #008080"> 44</span> <span style="color: #000000">    }
</span><span style="color: #008080"> 45</span> 
<span style="color: #008080"> 46</span>     <span style="color: #008000">/**</span>
<span style="color: #008080"> 47</span> <span style="color: #008000">     * 通过连接池获取HttpClient
</span><span style="color: #008080"> 48</span> <span style="color: #008000">     *
</span><span style="color: #008080"> 49</span> <span style="color: #008000">     * </span><span style="color: #808080">@return</span>
<span style="color: #008080"> 50</span>      <span style="color: #008000">*/</span>
<span style="color: #008080"> 51</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span><span style="color: #000000"> CloseableHttpClient getHttpClient() {
</span><span style="color: #008080"> 52</span> <span style="color: #000000">        init();
</span><span style="color: #008080"> 53</span>         <span style="color: #0000ff">return</span> HttpClients.custom().setConnectionManager(cm).setConnectionManagerShared(<span style="color: #0000ff">true</span><span style="color: #000000">) .build();
</span><span style="color: #008080"> 54</span> <span style="color: #000000">    }
</span><span style="color: #008080"> 55</span> 
<span style="color: #008080"> 56</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span><span style="color: #000000"> String httpGetRequest(String url) {
</span><span style="color: #008080"> 57</span>         HttpGet httpGet = <span style="color: #0000ff">new</span><span style="color: #000000"> HttpGet(url);
</span><span style="color: #008080"> 58</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> getResult(httpGet);
</span><span style="color: #008080"> 59</span> <span style="color: #000000">    }
</span><span style="color: #008080"> 60</span> 
<span style="color: #008080"> 61</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span> String httpGetRequest(String url, Map<String, Object> params) <span style="color: #0000ff">throws</span><span style="color: #000000"> URISyntaxException {
</span><span style="color: #008080"> 62</span>         URIBuilder ub = <span style="color: #0000ff">new</span><span style="color: #000000"> URIBuilder();
</span><span style="color: #008080"> 63</span> <span style="color: #000000">        ub.setPath(url);
</span><span style="color: #008080"> 64</span> 
<span style="color: #008080"> 65</span>         ArrayList<NameValuePair> pairs =<span style="color: #000000"> covertParams2NVPS(params);
</span><span style="color: #008080"> 66</span> <span style="color: #000000">        ub.setParameters(pairs);
</span><span style="color: #008080"> 67</span> 
<span style="color: #008080"> 68</span>         HttpGet httpGet = <span style="color: #0000ff">new</span><span style="color: #000000"> HttpGet(ub.build());
</span><span style="color: #008080"> 69</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> getResult(httpGet);
</span><span style="color: #008080"> 70</span> <span style="color: #000000">    }
</span><span style="color: #008080"> 71</span> 
<span style="color: #008080"> 72</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span> String httpGetRequest(String url, Map<String, Object> headers, Map<String, Object><span style="color: #000000"> params)
</span><span style="color: #008080"> 73</span>             <span style="color: #0000ff">throws</span><span style="color: #000000"> URISyntaxException {
</span><span style="color: #008080"> 74</span>         URIBuilder ub = <span style="color: #0000ff">new</span><span style="color: #000000"> URIBuilder();
</span><span style="color: #008080"> 75</span> <span style="color: #000000">        ub.setPath(url);
</span><span style="color: #008080"> 76</span> 
<span style="color: #008080"> 77</span>         ArrayList<NameValuePair> pairs =<span style="color: #000000"> covertParams2NVPS(params);
</span><span style="color: #008080"> 78</span> <span style="color: #000000">        ub.setParameters(pairs);
</span><span style="color: #008080"> 79</span> 
<span style="color: #008080"> 80</span>         HttpGet httpGet = <span style="color: #0000ff">new</span><span style="color: #000000"> HttpGet(ub.build());
</span><span style="color: #008080"> 81</span>         <span style="color: #0000ff">for</span> (Map.Entry<String, Object><span style="color: #000000"> param : headers.entrySet()) {
</span><span style="color: #008080"> 82</span> <span style="color: #000000">            httpGet.addHeader(param.getKey(), String.valueOf(param.getValue()));
</span><span style="color: #008080"> 83</span> <span style="color: #000000">        }
</span><span style="color: #008080"> 84</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> getResult(httpGet);
</span><span style="color: #008080"> 85</span> <span style="color: #000000">    }
</span><span style="color: #008080"> 86</span> 
<span style="color: #008080"> 87</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span><span style="color: #000000"> String httpPostRequest(String url) {
</span><span style="color: #008080"> 88</span>         HttpPost httpPost = <span style="color: #0000ff">new</span><span style="color: #000000"> HttpPost(url);
</span><span style="color: #008080"> 89</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> getResult(httpPost);
</span><span style="color: #008080"> 90</span> <span style="color: #000000">    }
</span><span style="color: #008080"> 91</span> 
<span style="color: #008080"> 92</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span> String httpPostRequest(String url, Map<String, Object> params) <span style="color: #0000ff">throws</span><span style="color: #000000"> UnsupportedEncodingException {
</span><span style="color: #008080"> 93</span>         HttpPost httpPost = <span style="color: #0000ff">new</span><span style="color: #000000"> HttpPost(url);
</span><span style="color: #008080"> 94</span>         ArrayList<NameValuePair> pairs =<span style="color: #000000"> covertParams2NVPS(params);
</span><span style="color: #008080"> 95</span>         httpPost.setEntity(<span style="color: #0000ff">new</span><span style="color: #000000"> UrlEncodedFormEntity(pairs, CONTENT_TYPE_UTF_8));
</span><span style="color: #008080"> 96</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> getResult(httpPost);
</span><span style="color: #008080"> 97</span> <span style="color: #000000">    }
</span><span style="color: #008080"> 98</span> 
<span style="color: #008080"> 99</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span> String httpPostRequest(String url, Map<String, Object> headers, Map<String, Object><span style="color: #000000"> params)
</span><span style="color: #008080">100</span>             <span style="color: #0000ff">throws</span><span style="color: #000000"> UnsupportedEncodingException {
</span><span style="color: #008080">101</span>         HttpPost httpPost = <span style="color: #0000ff">new</span><span style="color: #000000"> HttpPost(url);
</span><span style="color: #008080">102</span> 
<span style="color: #008080">103</span>         <span style="color: #0000ff">for</span> (Map.Entry<String, Object><span style="color: #000000"> param : headers.entrySet()) {
</span><span style="color: #008080">104</span> <span style="color: #000000">            httpPost.addHeader(param.getKey(), String.valueOf(param.getValue()));
</span><span style="color: #008080">105</span> <span style="color: #000000">        }
</span><span style="color: #008080">106</span> 
<span style="color: #008080">107</span>         ArrayList<NameValuePair> pairs =<span style="color: #000000"> covertParams2NVPS(params);
</span><span style="color: #008080">108</span>         httpPost.setEntity(<span style="color: #0000ff">new</span><span style="color: #000000"> UrlEncodedFormEntity(pairs, CONTENT_TYPE_UTF_8));
</span><span style="color: #008080">109</span> 
<span style="color: #008080">110</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> getResult(httpPost);
</span><span style="color: #008080">111</span> <span style="color: #000000">    }
</span><span style="color: #008080">112</span> 
<span style="color: #008080">113</span>     <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span> String httpPostJSON(String url, String json) <span style="color: #0000ff">throws</span><span style="color: #000000"> UnsupportedEncodingException {
</span><span style="color: #008080">114</span>         HttpPost httpPost = <span style="color: #0000ff">new</span><span style="color: #000000"> HttpPost(url);
</span><span style="color: #008080">115</span>         StringEntity s = <span style="color: #0000ff">new</span><span style="color: #000000"> StringEntity(json);
</span><span style="color: #008080">116</span> <span style="color: #000000">        s.setContentEncoding(CONTENT_TYPE_UTF_8);
</span><span style="color: #008080">117</span>         s.setContentType(CONTENT_TYPE_JSON);<span style="color: #008000">//</span><span style="color: #008000"> 发送json数据需要设置contentType</span>
<span style="color: #008080">118</span> <span style="color: #000000">        httpPost.setEntity(s);
</span><span style="color: #008080">119</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> getResult(httpPost);
</span><span style="color: #008080">120</span> <span style="color: #000000">    }
</span><span style="color: #008080">121</span> 
<span style="color: #008080">122</span> 
<span style="color: #008080">123</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> ArrayList<NameValuePair> covertParams2NVPS(Map<String, Object><span style="color: #000000"> params) {
</span><span style="color: #008080">124</span>         ArrayList<NameValuePair> pairs = <span style="color: #0000ff">new</span> ArrayList<><span style="color: #000000">();
</span><span style="color: #008080">125</span>         <span style="color: #0000ff">for</span> (Map.Entry<String, Object><span style="color: #000000"> param : params.entrySet()) {
</span><span style="color: #008080">126</span>             pairs.add(<span style="color: #0000ff">new</span><span style="color: #000000"> BasicNameValuePair(param.getKey(), String.valueOf(param.getValue())));
</span><span style="color: #008080">127</span> <span style="color: #000000">        }
</span><span style="color: #008080">128</span> 
<span style="color: #008080">129</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> pairs;
</span><span style="color: #008080">130</span> <span style="color: #000000">    }
</span><span style="color: #008080">131</span> 
<span style="color: #008080">132</span>     <span style="color: #008000">/**</span>
<span style="color: #008080">133</span> <span style="color: #008000">     * 处理Http请求
</span><span style="color: #008080">134</span> <span style="color: #008000">     *
</span><span style="color: #008080">135</span> <span style="color: #008000">     * </span><span style="color: #808080">@param</span><span style="color: #008000"> request
</span><span style="color: #008080">136</span> <span style="color: #008000">     * </span><span style="color: #808080">@return</span>
<span style="color: #008080">137</span>      <span style="color: #008000">*/</span>
<span style="color: #008080">138</span>     <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span><span style="color: #000000"> String getResult(HttpRequestBase request) {
</span><span style="color: #008080">139</span> 
<span style="color: #008080">140</span>         RequestConfig.Builder config =<span style="color: #000000"> RequestConfig.copy(RequestConfig.DEFAULT);
</span><span style="color: #008080">141</span> <span style="color: #000000">        config.setConnectionRequestTimeout(CONNECTION_TIMEOUT_MS);
</span><span style="color: #008080">142</span> <span style="color: #000000">        config.setSocketTimeout(SO_TIMEOUT_MS);
</span><span style="color: #008080">143</span> 
<span style="color: #008080">144</span> <span style="color: #000000">        request.setConfig(config.build());
</span><span style="color: #008080">145</span> 
<span style="color: #008080">146</span>         <span style="color: #008000">//</span><span style="color: #008000"> CloseableHttpClient httpClient = HttpClients.createDefault();</span>
<span style="color: #008080">147</span>         CloseableHttpClient httpClient =<span style="color: #000000"> getHttpClient();
</span><span style="color: #008080">148</span>         CloseableHttpResponse response = <span style="color: #0000ff">null</span><span style="color: #000000">;
</span><span style="color: #008080">149</span>         <span style="color: #0000ff">try</span><span style="color: #000000"> {
</span><span style="color: #008080">150</span>             response =<span style="color: #000000"> httpClient.execute(request);
</span><span style="color: #008080">151</span>             <span style="color: #008000">//</span><span style="color: #008000"> response.getStatusLine().getStatusCode();</span>
<span style="color: #008080">152</span>             HttpEntity entity =<span style="color: #000000"> response.getEntity();
</span><span style="color: #008080">153</span>             <span style="color: #0000ff">if</span> (entity != <span style="color: #0000ff">null</span><span style="color: #000000">) {
</span><span style="color: #008080">154</span>                 <span style="color: #008000">//</span><span style="color: #008000"> long len = entity.getContentLength();</span><span style="color: #008000">//</span><span style="color: #008000"> -1 表示长度未知</span>
<span style="color: #008080">155</span>                 <span style="color: #0000ff">return</span><span style="color: #000000"> EntityUtils.toString(entity);
</span><span style="color: #008080">156</span> <span style="color: #000000">            }
</span><span style="color: #008080">157</span>         } <span style="color: #0000ff">catch</span><span style="color: #000000"> (IOException e) {
</span><span style="color: #008080">158</span> <span style="color: #000000">            e.printStackTrace();
</span><span style="color: #008080">159</span>         } <span style="color: #0000ff">finally</span><span style="color: #000000"> {
</span><span style="color: #008080">160</span>             <span style="color: #0000ff">try</span><span style="color: #000000"> {
</span><span style="color: #008080">161</span>                 <span style="color: #008000">//</span><span style="color: #008000"> 释放Socket流</span>
<span style="color: #008080">162</span> <span style="color: #000000">                response.close();
</span><span style="color: #008080">163</span>                 <span style="color: #008000">//</span><span style="color: #008000"> 释放Connection
</span><span style="color: #008080">164</span>                 <span style="color: #008000">//</span><span style="color: #008000"> httpClient.close();</span>
<span style="color: #008080">165</span>             } <span style="color: #0000ff">catch</span><span style="color: #000000"> (IOException e) {
</span><span style="color: #008080">166</span> <span style="color: #000000">                e.printStackTrace();
</span><span style="color: #008080">167</span> <span style="color: #000000">            }
</span><span style="color: #008080">168</span> <span style="color: #000000">        }
</span><span style="color: #008080">169</span> 
<span style="color: #008080">170</span>         <span style="color: #0000ff">return</span><span style="color: #000000"> EMPTY_STR;
</span><span style="color: #008080">171</span> <span style="color: #000000">    }
</span><span style="color: #008080">172</span> 
<span style="color: #008080">173</span> }
登入後複製

 

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