本文实例讲述了java使用jdbc连接postgresql数据库。分享给大家供大家参考，具体如下：
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package tool;import java.sql.connection;import java.sql.drivermanager;import java.sql.preparedstatement;import java.sql.resultset;import java.sql.sqlexception;public class psqlconnectiontool { private string url = "jdbc:postgresql://xxx.xxx.xxx.xxx:5432/testdb"; private string username = "postgres"; private string password = "postgres"; private connection connection = null; public connection getconn() { try { class.forname("org.postgresql.driver").newinstance(); connection = drivermanager.getconnection(url, username, password); } catch (instantiationexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (illegalaccessexception e) { // todo auto-generated catch block e.printstacktrace(); } catch (classnotfoundexception e) { // todo auto-generated catch block e.printstacktrace(); }catch (sqlexception e) { // todo auto-generated catch block e.printstacktrace(); } return connection; } public resultset query(connection conn, string sql) { preparedstatement pstatement = null; resultset rs = null; try { pstatement = conn.preparestatement(sql); rs = pstatement.executequery(); } catch (sqlexception e) { e.printstacktrace(); } return rs; } public boolean queryupdate(connection conn, string sql) { preparedstatement pstatement = null; int rs = 0; try { pstatement = conn.preparestatement(sql); rs = pstatement.executeupdate(); } catch (sqlexception e) { // todo auto-generated catch block e.printstacktrace(); } if (rs > 0) { return true; } return false; } public static void main(string[] args) throws sqlexception { psqlconnectiontool pgtool = new psqlconnectiontool(); connection myconn = pgtool.getconn(); pgtool.queryupdate(myconn, "insert into test values (1,'smoon','man')"); resultset rs = pgtool.query(myconn, "select * from test"); while(rs.next()){ int id = rs.getint("id"); string name = rs.getstring("name"); string gender = rs.getstring("gender"); system.out.println("id:"+id+" 姓名："+name+" 性别："+gender); myconn.close(); } }} |
希望本文所述对大家java程序设计有所帮助。
原文链接：https://blog.csdn.net/s465689853/article/details/81217448
