java实现python session功能代码实例
这篇文章主要介绍了java实现python session功能代码实例,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
怎么在java中实现类似于python的requests模块的session功能呢。java也是可以实现的,用java的okhttp包可以实现。
在pom.xml中加入相关依赖
<!-- https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp --> <dependency> <groupId>com.squareup.okhttp3</groupId> <artifactId>okhttp</artifactId> <version>4.2.2</version> </dependency>
后面是相关的java代码:
package com.puple.atto.datastructure; import java.text.MessageFormat; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Set; import java.util.regex.*; import okhttp3.Cookie; import okhttp3.CookieJar; import okhttp3.FormBody; import okhttp3.HttpUrl; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.Response; public class Session { private final OkHttpClient mOkHttpClient = new OkHttpClient.Builder().cookieJar(new CookieJarManager()).build(); // //如果直接写个类,里面写saveFromResponse和loadForRequest,而不实现CookieJar接口,运行可以正常通过,但ide会显红,因为Bulider类的cookieJsr方法需要接受CookieJar类型的实例。鸭子类除了能节约代码行数,在可理解性 可读性 多人合作性上面都不如接口规范,谁知道鸭子类里面要写什么方法,除了写代码得人自己。 private class CookieJarManager implements CookieJar{ private final HashMap<String, List<Cookie>> cookieStore = new HashMap<>(); @Override public void saveFromResponse(HttpUrl url, List<Cookie> cookies) { cookieStore.put(url.host(), cookies); } @Override public List<Cookie> loadForRequest(HttpUrl url) { List<Cookie> cookies = cookieStore.get(url.host()); return cookies != null ? cookies : new ArrayList<Cookie>(){}; } } /** * @param url 要请求的url * @param paramsMap post的请求参数 * @return post的返回结果 */ public String post(String url, HashMap<String, String > paramsMap){ FormBody.Builder formBodyBuilder = new FormBody.Builder(); Set<String> keySet = paramsMap.keySet(); for(String key:keySet) { String value = paramsMap.get(key); formBodyBuilder.add(key,value); } FormBody formBody = formBodyBuilder.build(); Request request = new Request .Builder() .post(formBody) .url(url) .build(); try (Response response = mOkHttpClient.newCall(request).execute()) { String respStr = response.body().string(); return respStr; }catch (Exception e){ e.printStackTrace(); return ""; } } public String get(String url) { final Request.Builder builder = new Request.Builder(); builder.url(url); final Request request = builder.build(); try (Response response = mOkHttpClient.newCall(request).execute()) { return response.body().string(); }catch (Exception e){ e.printStackTrace(); return ""; } } public static void test(){ Session ss=new Session(); String loginUrl="http://192.168.9.244:8080/RDCJWeb/login"; HashMap<String,String> paramsMap = new HashMap<>() ; paramsMap.put("username","soft1"); paramsMap.put("password","soft1"); String respStr = ss.post(loginUrl,paramsMap); String res=ss.get("http://192.168.9.244:8080/RDCJWeb/static/dist/html/deviceWarn.html"); System.out.println(res); } public static void main(String[] args) { test(); } }
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