1.json转换工具

import java.util.List;import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;/*** json转换工具类*/
public class JsonUtils {// 定义jackson对象private static final ObjectMapper MAPPER = new ObjectMapper();/*** 将对象转换成json字符串。* 
Title: pojoToJson
* 
Description: 
* @param data* @return*/public static String objectToJson(Object data) {try {String string = MAPPER.writeValueAsString(data);return string;} catch (JsonProcessingException e) {e.printStackTrace();}return null;}/*** 将json结果集转化为对象* * @param jsonData json数据* @param clazz 对象中的object类型* @return*/public static  T jsonToPojo(String jsonData, Class beanType) {try {T t = MAPPER.readValue(jsonData, beanType);return t;} catch (Exception e) {e.printStackTrace();}return null;}/*** 将json数据转换成pojo对象list* 
Title: jsonToList
* 
Description: 
* @param jsonData* @param beanType* @return*/public static List jsonToList(String jsonData, Class beanType) {JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);try {List list = MAPPER.readValue(jsonData, javaType);return list;} catch (Exception e) {e.printStackTrace();}return null;}}

2.cookie的读写

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** * Cookie 工具类**/
public final class CookieUtils {/*** 得到Cookie的值, 不编码* * @param request* @param cookieName* @return*/public static String getCookieValue(HttpServletRequest request, String cookieName) {return getCookieValue(request, cookieName, false);}/*** 得到Cookie的值,* * @param request* @param cookieName* @return*/public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {Cookie[] cookieList = request.getCookies();if (cookieList == null || cookieName == null) {return null;}String retValue = null;try {for (int i = 0; i < cookieList.length; i++) {if (cookieList[i].getName().equals(cookieName)) {if (isDecoder) {retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");} else {retValue = cookieList[i].getValue();}break;}}} catch (UnsupportedEncodingException e) {e.printStackTrace();}return retValue;}/*** 得到Cookie的值,* * @param request* @param cookieName* @return*/public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {Cookie[] cookieList = request.getCookies();if (cookieList == null || cookieName == null) {return null;}String retValue = null;try {for (int i = 0; i < cookieList.length; i++) {if (cookieList[i].getName().equals(cookieName)) {retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);break;}}} catch (UnsupportedEncodingException e) {e.printStackTrace();}return retValue;}/*** 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue) {setCookie(request, response, cookieName, cookieValue, -1);}/*** 设置Cookie的值 在指定时间内生效,但不编码*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, int cookieMaxage) {setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);}/*** 设置Cookie的值 不设置生效时间,但编码*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, boolean isEncode) {setCookie(request, response, cookieName, cookieValue, -1, isEncode);}/*** 设置Cookie的值 在指定时间内生效, 编码参数*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, int cookieMaxage, boolean isEncode) {doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);}/*** 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, int cookieMaxage, String encodeString) {doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);}/*** 删除Cookie带cookie域名*/public static void deleteCookie(HttpServletRequest request, HttpServletResponse response,String cookieName) {doSetCookie(request, response, cookieName, "", -1, false);}/*** 设置Cookie的值，并使其在指定时间内生效* * @param cookieMaxage cookie生效的最大秒数*/private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {try {if (cookieValue == null) {cookieValue = "";} else if (isEncode) {cookieValue = URLEncoder.encode(cookieValue, "utf-8");}Cookie cookie = new Cookie(cookieName, cookieValue);if (cookieMaxage > 0)cookie.setMaxAge(cookieMaxage);if (null != request) {// 设置域名的cookieString domainName = getDomainName(request);System.out.println(domainName);if (!"localhost".equals(domainName)) {cookie.setDomain(domainName);}}cookie.setPath("/");response.addCookie(cookie);} catch (Exception e) {e.printStackTrace();}}/*** 设置Cookie的值，并使其在指定时间内生效* * @param cookieMaxage cookie生效的最大秒数*/private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,String cookieName, String cookieValue, int cookieMaxage, String encodeString) {try {if (cookieValue == null) {cookieValue = "";} else {cookieValue = URLEncoder.encode(cookieValue, encodeString);}Cookie cookie = new Cookie(cookieName, cookieValue);if (cookieMaxage > 0)cookie.setMaxAge(cookieMaxage);if (null != request) {// 设置域名的cookieString domainName = getDomainName(request);System.out.println(domainName);if (!"localhost".equals(domainName)) {cookie.setDomain(domainName);}}cookie.setPath("/");response.addCookie(cookie);} catch (Exception e) {e.printStackTrace();}}/*** 得到cookie的域名*/private static final String getDomainName(HttpServletRequest request) {String domainName = null;String serverName = request.getRequestURL().toString();if (serverName == null || serverName.equals("")) {domainName = "";} else {serverName = serverName.toLowerCase();serverName = serverName.substring(7);final int end = serverName.indexOf("/");serverName = serverName.substring(0, end);final String[] domains = serverName.split("\\.");int len = domains.length;if (len > 3) {// www.xxx.com.cndomainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];} else if (len <= 3 && len > 1) {// www.sychzs.cn or xxx.cndomainName = "." + domains[len - 2] + "." + domains[len - 1];} else {domainName = serverName;}}if (domainName != null && domainName.indexOf(":") > 0) {String[] ary = domainName.split("\\:");domainName = ary[0];}return domainName;}}

3.HttpClientUtil

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import www.sychzs.cn;import org.apache.http.NameValuePair;
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.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;public class HttpClientUtil {public static String doGet(String url, Map param) {// 创建Httpclient对象CloseableHttpClient httpclient = HttpClients.createDefault();String resultString = "";CloseableHttpResponse response = null;try {// 创建uriURIBuilder builder = new URIBuilder(url);if (param != null) {for (String key : param.keySet()) {builder.addParameter(key, param.get(key));}}URI uri = www.sychzs.cn();// 创建http GET请求HttpGet httpGet = new HttpGet(uri);// 执行请求response = httpclient.execute(httpGet);// 判断返回状态是否为200if (response.getStatusLine().getStatusCode() == 200) {resultString = EntityUtils.toString(response.getEntity(), "UTF-8");}} catch (Exception e) {e.printStackTrace();} finally {try {if (response != null) {response.close();}httpclient.close();} catch (IOException e) {e.printStackTrace();}}return resultString;}public static String doGet(String url) {return doGet(url, null);}public static String doPost(String url, Map param) {// 创建Httpclient对象CloseableHttpClient httpClient = HttpClients.createDefault();CloseableHttpResponse response = null;String resultString = "";try {// 创建Http Post请求HttpPost httpPost = new HttpPost(url);// 创建参数列表if (param != null) {List paramList = new ArrayList<>();for (String key : param.keySet()) {paramList.add(new BasicNameValuePair(key, param.get(key)));}// 模拟表单UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);httpPost.setEntity(entity);}// 执行http请求response = httpClient.execute(httpPost);resultString = EntityUtils.toString(response.getEntity(), "utf-8");} catch (Exception e) {e.printStackTrace();} finally {try {response.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return resultString;}public static String doPost(String url) {return doPost(url, null);}public static String doPostJson(String url, String json) {// 创建Httpclient对象CloseableHttpClient httpClient = HttpClients.createDefault();CloseableHttpResponse response = null;String resultString = "";try {// 创建Http Post请求HttpPost httpPost = new HttpPost(url);// 创建请求内容StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);httpPost.setEntity(entity);// 执行http请求response = httpClient.execute(httpPost);resultString = EntityUtils.toString(response.getEntity(), "utf-8");} catch (Exception e) {e.printStackTrace();} finally {try {response.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return resultString;}
}