今天总结一下对于HttpClient的封装以及使用，便于以后的使用，这里我只封装了接收参数为Json形式的POST与GET两种方法，对于其他的方法大家可以随时留言，一起讨论。
HttpClientUtils 类：
import java.io.IOException; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.util.EntityUtils; import org.apache.commons.lang.StringUtils; public class HttpClientUtils { /** * * @param url * 传递过来的地址 * @param params * 参数信息（参数仅为json格式） * @return * @throws ClientProtocolException * @throws IOException */ public static String doGet(String url, String params) throws ClientProtocolException, IOException { // 用来接收响应信息 String response = null; // 创建HttpClient HttpClient httpClient = new DefaultHttpClient(); HttpGet httpGet = new HttpGet(url); // 执行请求 HttpResponse httpResponse = httpClient.execute(httpGet); // 判断响应值是否是200 if (httpResponse.getStatusLine().getStatusCode() == 200) { // 请求和响应都成功了 // 调用getEntity()方法获取到一个HttpEntity实例 HttpEntity entity = httpResponse.getEntity(); // 用EntityUtils.toString()这个静态方法将HttpEntity转换成字符串 // 防止服务器返回的数据带有中文,所以在转换的时候将字符集指定成utf-8就可以了 response = EntityUtils.toString(entity, "utf-8"); } return response; } /** * * @param url * 请求地址 * @param method * 请求方式 * @param params * 元素参数 * @return * @throws ClientProtocolException * @throws IOException */ public static String doPost(String url, String method, String params) throws ClientProtocolException, IOException { // 用来接收响应信息 String response = null; // 创建HttpClient HttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(url); //设置请求头为Json形式 httpPost.setHeader("Content-Type", "application/json;charset=UTF-8"); if (StringUtils.isNotBlank(params)) { httpPost.setEntity(new StringEntity(params, "utf-8")); } HttpResponse httpResponse = httpClient.execute(httpPost); if (httpResponse.getStatusLine().getStatusCode() == 200) { // 请求和响应都成功了 // 调用getEntity()方法获取到一个HttpEntity实例 HttpEntity entity = httpResponse.getEntity(); // 用EntityUtils.toString()这个静态方法将HttpEntity转换成字符串 // 防止服务器返回的数据带有中文,所以在转换的时候将字符集指定成utf-8就可以了 response = EntityUtils.toString(entity, "utf-8"); } return response; } }
调用的时候
String result = HttpClientUtils.doPost(url,testJson); System.out.println("返回值内容："+result);
希望能够对大家日后的学习有所帮助！。
