AJAX+echarts+springboot实现前端向后端请求数据

package com.hxw.util; import com.alibaba.fastjson.JSONObject; import com.google.common.base.Charsets; import org.apache.commons.lang3.StringUtils; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.config.RequestConfig; import org.apache.http.client.entity.UrlEncodedFormEntity; 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.CloseableHttpClient; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; import java.net.HttpURLConnection; import java.net.URI; import java.net.URISyntaxException; import java.net.URL; import java.util.*; public class HttpClientUtil { private static final Logger log = LoggerFactory.getLogger(HttpClientUtil.class); public static String doGet(String url, Map<String, String> map) { return doGet(url, map, "UTF-8"); } /** * post请求,传参放在url上,以?key=value形式传参 * * @param url * @param map * @return */ public static String doPost(String url, Map<String, String> map) { return doPost(url, map, "UTF-8"); } public static String doPost(String url, JSONObject params) { return doPost(url, params, "UTF-8"); } public static String doPostByGBK(String url, Map<String, String> map) { return doPost(url, map, "GBK"); } public static String doPostByUTF(String url, Map<String, String> map) { return doPostHttps(url, map, "UTF-8"); } /** * HttpClient post请求，已body中json格式传参 * * @param josn * @param url * @return */ public static String catPost(String josn, String url) { //默认长连接 String content = ""; try { HttpClient httpClient = new DefaultHttpClient(); HttpPost post = new HttpPost(url); StringEntity postingString = new StringEntity(josn, Charsets.UTF_8); post.setEntity(postingString); post.setHeader("Content-Type", "application/json;charset=UTF-8"); HttpResponse response = httpClient.execute(post); content = EntityUtils.toString(response.getEntity()); } catch (ClientProtocolException e) { log.error("ClientProtocolException", e.getMessage()); } catch (IOException e) { log.error("IOException", e.getMessage()); } return content; } /** * HttpURLConnection 以http方式发送请求，并将请求响应内容以String格式返回 * * @param path 请求路径 * @param method 请求方法 * @param body 请求数据 * @return 返回响应的字符串 */ public static String postTest(String path, String method, String body) { String response = null; HttpURLConnection conn = null; InputStream inputStream = null; InputStreamReader inputStreamReader = null; BufferedReader bufferedReader = null; try { URL url = new URL(path); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod(method); conn.setDoOutput(true); conn.setDoInput(true); conn.setUseCaches(false); //设置连接主机超时60s conn.setConnectTimeout(60000); //设置从主机读取数据超时60s conn.setReadTimeout(60000); conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8"); if (null != body) { //连接 conn.connect(); OutputStream outputStream = conn.getOutputStream(); outputStream.write(body.getBytes("UTF-8")); outputStream.flush(); outputStream.close(); } if (conn.getResponseCode() == HttpStatus.SC_OK) { inputStream = conn.getInputStream(); } else { inputStream = conn.getErrorStream(); } if (null != inputStream) { inputStreamReader = new InputStreamReader( inputStream, "UTF-8"); bufferedReader = new BufferedReader( inputStreamReader); String str = null; StringBuffer buffer = new StringBuffer(); while ((str = bufferedReader.readLine()) != null) { buffer.append(str); } response = buffer.toString(); } } catch (Exception e) { log.error("Exception", e.getMessage()); } finally { if (conn != null) { conn.disconnect(); } try { if (null != bufferedReader) { bufferedReader.close(); } if (null != inputStreamReader) { inputStreamReader.close(); } if (null != inputStream) { inputStream.close(); } } catch (IOException e) { log.info("error", e.getMessage()); } } return response; } public static String doPost(String url, Map<String, String> map, String code) { CloseableHttpClient httpclient = HttpClients.createDefault(); HttpPost httppost = new HttpPost(url); httppost.setHeader("Connection", "close"); //超时设置 RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(10000).setConnectTimeout(10000).build(); httppost.setConfig(requestConfig); List<NameValuePair> params = new ArrayList<NameValuePair>(); Set<String> set = map.keySet(); Iterator<String> it = set.iterator(); while (it.hasNext()) { String name = it.next(); params.add(new BasicNameValuePair(name, map.get(name))); } String str = null; try { httppost.setEntity(new UrlEncodedFormEntity(params, code)); HttpResponse response = httpclient.execute(httppost); if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { HttpEntity entity = response.getEntity(); if (entity != null) { str = EntityUtils.toString(entity, code); } } } catch (UnsupportedEncodingException e) { log.error("UnsupportedEncodingException", e.getMessage()); } catch (ClientProtocolException e) { log.error("ClientProtocolException", e.getMessage()); } catch (IOException e) { log.error("IOException", e.getMessage()); } finally { try { httppost.releaseConnection(); httpclient.close(); } catch (IOException e) { log.error("IOException", e.getMessage()); } } return str; } /** * 气候云AOS获取病虫害数量专用（请求头增加） * * @param url * @param map * @param token * @return */ public static String doPestCountGet(String url, Map<String, String> map, String token) { CloseableHttpClient httpclient = HttpClients.crea