轉載請標明出處:http://blog.csdn.net/zhaoyanjun6/article/details/78112856 本文出自 "【趙彥軍的博客】" 在插件開發過程中,我們按照開發一個正式的項目來操作,需要整理一些常用工具類。 Http 請求封裝 在插件的項目中,我們看到依賴庫如下圖所 ...
轉載請標明出處:http://blog.csdn.net/zhaoyanjun6/article/details/78112856
本文出自【趙彥軍的博客】
在插件開發過程中,我們按照開發一個正式的項目來操作,需要整理一些常用工具類。
Http 請求封裝
在插件的項目中,我們看到依賴庫如下圖所示:
在依賴包中,我們可以看到插件中是用了 httpClient 作為 http 底層連接庫,做過 Android 開發的同學對 httpClient 庫應該很熟悉,在早期的Android開發中,我們都用 httpClient 做 http 請求,後來被Android 廢棄了。
另外,在這裡的 Json 解析用的 Gson , 是谷歌官方出品的 Json 解析框架。
下麵我們總結一個 HttpManager 以滿足日常的插件開發需求,HttpManager 目前滿足的功能有
- Get 請求
HttpManager.getInstance().get(String url) ;
HttpManager.getInstance().get(String url, Map<String, String> params) ;
- Post 請求
HttpManager.getInstance().post(String url, Map<String, String> requestParams) ;
- 下載文件
HttpManager.getInstance().downloadFile(String url, String destFileName);
如果我們需要其他的網路服務,可以自行搜索 Httpclient 的其他功能。
HttpManager 源碼如下所示:
package com.http;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
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.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.io.*;
import java.net.URI;
import java.net.URLEncoder;
import java.util.*;
public class HttpManager {
private static HttpManager ourInstance = new HttpManager();
public static HttpManager getInstance() {
return ourInstance;
}
private HttpManager() {
}
/**
* POST請求
*
* @param url
* @param requestParams
* @return
* @throws Exception
*/
public String post(String url, Map<String, String> requestParams) throws Exception {
String result = null;
CloseableHttpClient httpClient = HttpClients.createDefault();
/**HttpPost*/
HttpPost httpPost = new HttpPost(url);
List params = new ArrayList();
Iterator<Map.Entry<String, String>> it = requestParams.entrySet().iterator();
while (it.hasNext()) {
Map.Entry<String, String> en = it.next();
String key = en.getKey();
String value = en.getValue();
if (value != null) {
params.add(new BasicNameValuePair(key, value));
}
}
httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
/**HttpResponse*/
CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
try {
HttpEntity httpEntity = httpResponse.getEntity();
result = EntityUtils.toString(httpEntity, "utf-8");
EntityUtils.consume(httpEntity);
} finally {
try {
if (httpResponse != null) {
httpResponse.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
/**
* GET 請求
*
* @param url
* @param params
* @return
*/
public String get(String url, Map<String, String> params) {
return get(getUrlWithQueryString(url, params));
}
/**
* Get 請求
*
* @param url
* @return
*/
public String get(String url) {
CloseableHttpClient httpCient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet();
httpGet.setURI(URI.create(url));
String result = null;
//第三步:執行請求,獲取伺服器發還的相應對象
CloseableHttpResponse httpResponse = null;
try {
httpResponse = httpCient.execute(httpGet);
if (httpResponse.getStatusLine().getStatusCode() == 200) {
HttpEntity entity = httpResponse.getEntity();
String response = EntityUtils.toString(entity, "utf-8");//將entity當中的數據轉換為字元串
result = response.toString();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (httpResponse != null) {
try {
httpResponse.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
/**
* 根據api地址和參數生成請求URL
*
* @param url
* @param params
* @return
*/
private String getUrlWithQueryString(String url, Map<String, String> params) {
if (params == null) {
return url;
}
StringBuilder builder = new StringBuilder(url);
if (url.contains("?")) {
builder.append("&");
} else {
builder.append("?");
}
int i = 0;
for (String key : params.keySet()) {
String value = params.get(key);
if (value == null) { //過濾空的key
continue;
}
if (i != 0) {
builder.append('&');
}
builder.append(key);
builder.append('=');
builder.append(encode(value));
i++;
}
return builder.toString();
}
/**
* 下載文件
*
* @param url
* @param destFileName
* @throws ClientProtocolException
* @throws IOException
*/
public boolean downloadFile(String url, String destFileName) {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpGet httpget = new HttpGet(url);
HttpResponse response = null;
InputStream in = null;
try {
response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
in = entity.getContent();
File file = new File(destFileName);
FileOutputStream fout = new FileOutputStream(file);
int l = -1;
byte[] tmp = new byte[1024];
while ((l = in.read(tmp)) != -1) {
fout.write(tmp, 0, l);
}
fout.flush();
fout.close();
return true;
} catch (IOException e) {
e.printStackTrace();
} finally {
// 關閉低層流。
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return false;
}
/**
* 進行URL編碼
*
* @param input
* @return
*/
private String encode(String input) {
if (input == null) {
return "";
}
try {
return URLEncoder.encode(input, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return input;
}
}
Json 解析封裝
根據 Gson 庫進行封裝,具體用法如下:
- json字元串轉對象
JsonUtil.fromJson(String json, Class<T> classOfT)
- 對象轉json字元串
JsonUtil.toJson(Object src);
JsonUtil 源碼如下:
package com.util;
import com.google.gson.Gson;
public class JsonUtil {
static Gson gson = new Gson() ;
/**
* json字元串轉對象
* @param json
* @param classOfT
* @param <T>
* @return
*/
public static <T>T fromJson(String json, Class<T> classOfT){
return gson.fromJson(json,classOfT);
}
/**
* 對象轉json字元串
* @param src
* @return
*/
public static String toJson(Object src){
return gson.toJson(src);
}
}
Log 日誌
Logger 類源碼
package com.util;
import com.intellij.notification.*;
/**
* logger
* Created by zhaoyanjun on 15/11/27.
*/
public class Logger {
private static String NAME;
private static int LEVEL = 0;
public static final int DEBUG = 3;
public static final int INFO = 2;
public static final int WARN = 1;
public static final int ERROR = 0;
public static void init(String name,int level) {
NAME = name;
LEVEL = level;
NotificationsConfiguration.getNotificationsConfiguration().register(NAME, NotificationDisplayType.NONE);
}
public static void debug(String text) {
if (LEVEL >= DEBUG) {
Notifications.Bus.notify(
new Notification(NAME, NAME + " [DEBUG]", text, NotificationType.INFORMATION));
}
}
public static void info(String text) {
if (LEVEL > INFO) {
Notifications.Bus.notify(
new Notification(NAME, NAME + " [INFO]", text, NotificationType.INFORMATION));
}
}
public static void warn(String text) {
if (LEVEL > WARN) {
Notifications.Bus.notify(
new Notification(NAME, NAME + " [WARN]", text, NotificationType.WARNING));
}
}
public static void error(String text) {
if (LEVEL > ERROR) {
Notifications.Bus.notify(
new Notification(NAME, NAME + " [ERROR]", text, NotificationType.ERROR));
}
}
}
使用
//初始化
Logger.init("zhao" , Logger.DEBUG);
//列印 debug 信息
Logger.debug("i am a debug");
//列印info信息
Logger.info("i am a info");
//列印warn信息
Logger.warn("i am a warn");
//列印error信息
Logger.error("i am a error");
在 Android Studio 里效果如下
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