Utils--前台调用后台接口工具类

　　　　　　Utils--前台调用后台接口工具类

package com.taotao.manage.httpclient;

import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class ApiHttpClientService implements BeanFactoryAware {

	private BeanFactory beanFactory;

	@Autowired(required=false)
	private RequestConfig config;

	/**
	 * GET请求，成功返回String；失败返回null
	 * 
	 * @param url
	 * @return
	 * @throws ParseException
	 * @throws IOException
	 */
	public String doGet(String url) throws ParseException, IOException {
		// 2、创建http GET请求
		HttpGet httpGet = new HttpGet(url);
		httpGet.setConfig(config);
		CloseableHttpResponse response = null;
		try {
			// 3、执行请求
			response = getttpClient().execute(httpGet);
			// 4、判断返回状态是否为200
			if (response.getStatusLine().getStatusCode() == 200) {
				return EntityUtils.toString(response.getEntity(), "UTF-8");
			}
		} finally {
			if (response != null) {
				response.close();
			}
		}
		return null;
	}

	/**
	 * 带有参数的GET请求 ，返回：null，请求失败，String数据，请求成功
	 * 
	 * @param url
	 * @param params
	 * @return
	 * @throws URISyntaxException
	 * @throws IOException
	 * @throws ParseException
	 */
	public String doGet(String url, Map<String, String> params) throws URISyntaxException, ParseException, IOException {
		URIBuilder uriBuilder = new URIBuilder(url);
		for (Map.Entry<String, String> map : params.entrySet()) {
			uriBuilder.setParameter(map.getKey(), map.getValue());
		}
		return this.doGet(uriBuilder.build().toURL().toString());
	}

	/**
	 * 创建http POST请求
	 * 
	 * @param url
	 * @param params
	 * @return
	 * @throws IOException
	 * @throws ParseException
	 */
	public HttpResult doPost(String url, Map<String, String> params) throws ParseException, IOException {
		HttpPost httpPost = new HttpPost(url);
		httpPost.setConfig(config);
		// 伪装成浏览器访问
		// 设置2个post参数，一个是scope、一个是q
		if (params != null) {
			List<NameValuePair> parameters = new ArrayList<NameValuePair>(0);
			for (Map.Entry<String, String> map : params.entrySet()) {
				parameters.add(new BasicNameValuePair(map.getKey(), map.getValue()));
			}
			// 构造一个form表单式的实体
			UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(parameters);
			// 将请求实体设置到httpPost对象中
			httpPost.setEntity(formEntity);
		}
		CloseableHttpResponse response = null;
		try {
			// 执行请求
			response = getttpClient().execute(httpPost);
			// 判断返回状态是否为200
			return new HttpResult(response.getStatusLine().getStatusCode(),
					EntityUtils.toString(response.getEntity(), "UTF-8"));
		} finally {
			if (response != null) {
				response.close();
			}
		}
	}

	/**
	 * POST无餐请求
	 * 
	 * @param url
	 * @return
	 * @throws ParseException
	 * @throws IOException
	 */
	public HttpResult doPost(String url) throws ParseException, IOException {
		return this.doPost(url, null);
	}

	/**
	 * 拿到最新的，是多例的
	 * 
	 * @return
	 */
	public CloseableHttpClient getttpClient() {
		return this.beanFactory.getBean(CloseableHttpClient.class);
	}

	/**
	 * spring/applicationContext-HttpClient为多例 创建多例 ，可以放对象
	 * 
	 * @param bean
	 * @throws BeansException
	 */
	@Override
	public void setBeanFactory(BeanFactory bean) throws BeansException {
		this.beanFactory = bean;
	}
	
	/**
	 * 创建http POST请求json
	 * 
	 * @param url
	 * @param params
	 * @return
	 * @throws IOException
	 * @throws ParseException
	 */
	public HttpResult doPostJSON(String url, String params) throws ParseException, IOException {
		HttpPost httpPost = new HttpPost(url);
		httpPost.setConfig(config);
		// 伪装成浏览器访问
		// 设置2个post参数，一个是scope、一个是q
		if (params != null) {
			StringEntity entity=new StringEntity(params, ContentType.APPLICATION_JSON);
			// 将请求实体设置到httpPost对象中
			httpPost.setEntity(entity);
		}
		CloseableHttpResponse response = null;
		try {
			// 执行请求
			response = getttpClient().execute(httpPost);
			// 判断返回状态是否为200
			return new HttpResult(response.getStatusLine().getStatusCode(),
					EntityUtils.toString(response.getEntity(), "UTF-8"));
		} finally {
			if (response != null) {
				response.close();
			}
		}
	}
}

　　　好久之前写的，今天忽然有个想法，把这些工具类总计下。以便以后的使用