java根据isbn编码获取书籍信息（附赠http url的util包）

/**
* 测试
*
* */
@RequestMapping(value = "/test", method = RequestMethod.POST)
public JsonResult test() {
String url="https://api.douban.com/v2/book/isbn/:"+"9787115417305";
String result = HttpUtil.post(url, "", "GBK");
String url1="http://jisuisbn.market.alicloudapi.com/isbn/query?isbn="+"9787212058937";
String result1 = HttpUtil.get(url1, "GBK");
Map<String, Object> map = new HashMap<>();
map.put("result", result);
map.put("result1", result1);
return new JsonResult(ResultCode.SUCCESS, "检测成功",map);
}

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import org.apache.http.HttpEntity;
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.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.protocol.HTTP;
import org.apache.http.util.EntityUtils;

public class HttpUtil {

/**
* get
*
* @param url
*            String
* @param charset
*            String
* @retur
4000
n String
*/
public static String get(String url, String charset) {
if (charset == null) {
charset = HTTP.UTF_8;
}
CloseableHttpClient httpClient = HttpClients.createDefault();
try{
HttpGet httpget = new HttpGet(url);
CloseableHttpResponse response = httpClient.execute(httpget);
try {
HttpEntity entity = response.getEntity();
return EntityUtils.toString(entity, charset);
} catch (Exception e) {
e.printStackTrace();
}finally {
if (response != null){
response.close();
}
}
}catch (Exception e){
e.printStackTrace();
}finally {
// 关闭连接,释放资源
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}

/**
* getForJisu
*
* @param url
*            String
* @param charset
*            String
* @return String
*/
public static String getForJisu(String url, String charset) {
if (charset == null) {
charset = HTTP.UTF_8;
}
CloseableHttpClient httpClient = HttpClients.createDefault();
try{
HttpGet httpget = new HttpGet(url);
httpget.addHeader("key", "value");
CloseableHttpResponse response = httpClient.execute(httpget);
try {
HttpEntity entity = response.getEntity();
return EntityUtils.toString(entity, charset);
} catch (Exception e) {
e.printStackTrace();
}finally {
if (response != null){
response.close();
}
}
}catch (Exception e){
e.printStackTrace();
}finally {
// 关闭连接,释放资源
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}

/**
* postForString
*
* @param url
*            String
* @param content
*            content
* @param charset
*            String
* @return String
*/
public static String post(String url, String content, String charset) {
if (charset == null) {
charset = HTTP.UTF_8;
}
CloseableHttpClient httpClient = HttpClients.createDefault();
try {
HttpPost httpPost = new HttpPost(url);
if (content != null) {
httpPost.setEntity(new StringEntity(content, charset));
}
CloseableHttpResponse response = httpClient.execute(httpPost);
try {
HttpEntity entity = response.getEntity();
return EntityUtils.toString(entity, charset);
} catch (Exception e) {
e.printStackTrace();
}finally {
if (response != null){
response.close();
}
}
}catch (Exception e){
e.printStackTrace();
}finally {
// 关闭连接,释放资源
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}

/**
* postForMap
*
* @param url
*            String
* @param map
*            HashMap 提交表单的键值对
* @param charset
*            String
* @return String
*/
public static String post(String url, HashMap<String, String> map, String charset) {
if (charset == null) {
charset = HTTP.UTF_8;
}
CloseableHttpClient httpClient = HttpClients.createDefault();
try {
HttpPost httpPost = new HttpPost(url);
List<NameValuePair> nvps = new ArrayList<>();
if (map != null) {
Iterator it = map.keySet().iterator();
while (it.hasNext()) {
String key = (String) it.next();
nvps.add(new BasicNameValuePair(key, map.get(key)));
}
}
httpPost.setEntity(new UrlEncodedFormEntity(nvps, charset));
// 设置header信息   指定报文头【Content-type】、【User-Agent】
//httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
//httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
// 执行请求操作，并拿到结果（同步阻塞）
CloseableHttpResponse response = httpClient.execute(httpPost);
try {
HttpEntity entity = response.getEntity();
return EntityUtils.toString(entity, charset);
} catch (Exception e) {
e.printStackTrace();
}finally {
if (response != null){
response.close();
}
}
}catch (Exception e){
e.printStackTrace();
}finally {
// 关闭连接,释放资源
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
}