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2013-10-29 01:17:00 153 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

PostgreSQL数据库全攻略：从入门到精通本文是一份PostgreSQL数据库综合指南，涵盖安装配置、基础操作和高级管理。主要内容包括：1) PostgreSQL简介与各平台安装方法；2) 数据库基本操作，如创建数据库/表、CRUD操作、用户权限管理；3) 高级功能包括索引优化、事务控制、视图、存储过程、触发器和扩展模块；4) 数据库管理维护，涉及配置调优、备份恢复、性能监控和日常维护；5) 安全设置与高可用方案。指南提供了从入门到进阶的实用知识，强调结合官方文档进行深入学习，帮助用户高效使用这一功能强大的开源关系型数据库系统。阅读详情

做了个web服务端，如何用android客户端交互数据

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【对比学习+分割】CRIS：CLIP驱动RIS图像分割（CVPR 2022） CRIS: CLIP-Driven Referring Image Segmentation 阅读详情

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qiuxin_qx 2013-10-29

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引用 2 楼 book_jb9802 的回复:

public static String doPostJson(String urlStr, Map<String, String> heads, String jsonStr) { try{ URL url = new URL(urlStr); HttpURLConnection connection = ((HttpURLConnection) url.openConnection()); connection.setDoInput(true); connection.setDoOutput(true); connection.setUseCaches(false); connection.setConnectTimeout(5000); connection.setRequestMethod("POST"); connection.setRequestProperty("Charset", "UTF-8"); //connection.setRequestProperty("Content-Type", "application/json-rpc"); connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); if (heads != null){ for(Map.Entry<String, String> head : heads.entrySet()){ connection.setRequestProperty(head.getKey(), head.getValue()); } } byte[] sendData = jsonStr.getBytes("UTF-8"); connection.setFixedLengthStreamingMode(sendData.length); connection.connect(); OutputStream out = connection.getOutputStream(); //out.write(sendData, 0, sendData.length); out.write(sendData); out.flush(); out.close(); InputStream input = connection.getInputStream(); StringBuffer sb = new StringBuffer(); byte[] buffer = new byte[512]; int len; while ((len = input.read(buffer)) != -1) { sb.append(new String(buffer, 0, len)); } input.close(); connection.disconnect(); return sb.toString(); }catch(Exception e){ Log.e("System.out", Log.getStackTraceString(e)); } return ""; } /** * 执行一个Http Get 请求，返回请求响应的HTML * @param url * 请求的URL地址 * @param heads * 请求时要设置的http头信息，没有设为null * */ public static String doGet(String url, Map<String, String> heads) { HttpResponse httpResponse = null; try { // 第1步：创建HttpGet对象 HttpGet httpGet = new HttpGet(url); if (heads != null){ for(Map.Entry<String, String> head : heads.entrySet()){ httpGet.addHeader(head.getKey(), head.getValue()); } } // 第2步：使用execute方法发送HTTP POST请求，并返回HttpResponse对象 httpResponse = new DefaultHttpClient().execute(httpGet); int statusCode = httpResponse.getStatusLine().getStatusCode(); if (statusCode == 200) { // 第3步：使用getEntity方法获得返回结果 String result = EntityUtils.toString(httpResponse.getEntity()); //System.out.println(result); return result; } } catch (Exception e) { Log.e("System.out", "Exception: "+Log.getStackTraceString(e)); } return null; }

这个还可以！可以试试

mmorss 2013-10-29

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引用 3 楼 q343524926 的回复:

http://hi.baidu.com/yezhonglu/item/ad7b6aa6b1cb021a030a4d37

楼主可以参考一下

hisadqw 2013-10-29

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http://hi.baidu.com/yezhonglu/item/ad7b6aa6b1cb021a030a4d37 楼主可以参考一下

book_jb9802 2013-10-29

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public static String doPostJson(String urlStr, Map<String, String> heads, String jsonStr) { try{ URL url = new URL(urlStr); HttpURLConnection connection = ((HttpURLConnection) url.openConnection()); connection.setDoInput(true); connection.setDoOutput(true); connection.setUseCaches(false); connection.setConnectTimeout(5000); connection.setRequestMethod("POST"); connection.setRequestProperty("Charset", "UTF-8"); //connection.setRequestProperty("Content-Type", "application/json-rpc"); connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); if (heads != null){ for(Map.Entry<String, String> head : heads.entrySet()){ connection.setRequestProperty(head.getKey(), head.getValue()); } } byte[] sendData = jsonStr.getBytes("UTF-8"); connection.setFixedLengthStreamingMode(sendData.length); connection.connect(); OutputStream out = connection.getOutputStream(); //out.write(sendData, 0, sendData.length); out.write(sendData); out.flush(); out.close(); InputStream input = connection.getInputStream(); StringBuffer sb = new StringBuffer(); byte[] buffer = new byte[512]; int len; while ((len = input.read(buffer)) != -1) { sb.append(new String(buffer, 0, len)); } input.close(); connection.disconnect(); return sb.toString(); }catch(Exception e){ Log.e("System.out", Log.getStackTraceString(e)); } return ""; } /** * 执行一个Http Get 请求，返回请求响应的HTML * @param url * 请求的URL地址 * @param heads * 请求时要设置的http头信息，没有设为null * */ public static String doGet(String url, Map<String, String> heads) { HttpResponse httpResponse = null; try { // 第1步：创建HttpGet对象 HttpGet httpGet = new HttpGet(url); if (heads != null){ for(Map.Entry<String, String> head : heads.entrySet()){ httpGet.addHeader(head.getKey(), head.getValue()); } } // 第2步：使用execute方法发送HTTP POST请求，并返回HttpResponse对象 httpResponse = new DefaultHttpClient().execute(httpGet); int statusCode = httpResponse.getStatusLine().getStatusCode(); if (statusCode == 200) { // 第3步：使用getEntity方法获得返回结果 String result = EntityUtils.toString(httpResponse.getEntity()); //System.out.println(result); return result; } } catch (Exception e) { Log.e("System.out", "Exception: "+Log.getStackTraceString(e)); } return null; }

小夏白糖 2013-10-29

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使用json吧

android新手

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