MySQL – DBCP and C3P0 connection pool

DBPC: Packages needed: commons-dbcp2-2.10.0.jar, commons-pool2-2.12.0.jar, commons-logging-1.2.jar accomplish: Create a new file dbcpconfig.properties #Connection settings driverClassName=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/jdbcstudy?useUnicode=true &characterEncoding=utf8 &useSSL=true username=root password=123456 #<!– Initialize connection –> initialSize=10 #Maximum number of connections maxActive=50 #<!– Maximum idle connection –> maxIdle=20 #<!– Minimum idle connection –> minIdle=5 #<!– The timeout waiting time is in milliseconds. 6000 milliseconds/1000 is equal to […]

The conflict between bcprov-jdk15to18 and other bcprov version jar packages (different versions of jars are compatible) is resolved, and the conflict with Dongfangtong bcprov-jdk15on.jar is resolved

Foreword The project needs to integrate a new SDK for service calls. It was developed and debugged locally using Tomcat. However, when updated to the server, it failed and the service could not be started. Error SecurityException: JCE cannot authenticate the provider BC. After replacing the jar with the same version as Dongfangtong, another error […]

ssm integrates configuration files and related analysis of mybatis, log4j and MySQL database, webmvc, shiro, dbcp, etc.

1pom file <project xmlns=”http://maven.apache.org/POM/4.0.0″ xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=” http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd”> <modelVersion>4.0.0</modelVersion> <groupId>com.xzp</groupId> <artifactId>wuliu</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <!–Configured a Maven War plug-in named “maven-war-plugin” to solve the problem of Cannot access defaults field of Properties –> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>3.3.1</version> </plugin> </plugins> </build> <!–Configured a Maven War plug-in named “maven-war-plugin” to solve the problem of Cannot access […]

Spring integrates JDBC (dbcp, C3P0, Druid, JdbcTemplate)

1. Integrated database connection pool dbcp 1. Import jar package <!– https://mvnrepository.com/artifact/commons-dbcp/commons-dbcp –> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <!– https://mvnrepository.com/artifact/mysql/mysql-connector-java –> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.31</version> </dependency> 2. Add configuration file spring.xml <beans xmlns=”http://www.springframework.org/schema/beans” xmlns:aop=”http://www.springframework.org/schema/aop” xmlns:context=”http://www.springframework.org/schema/context” xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=”http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd”> <!–Open annotations–> <context:annotation-config/> <!–Start component scanning–> <context:component-scan base-package=”com.yy”/> </beans> 3.Configure data source <–DBCP […]

Automated tool systems for LLMs (HuggingGPT, AutoGPT, WebGPT, WebCPM)

The enhanced language model and Tool Learning have been briefly introduced in the previous two blog posts. This article looks at four representative automation frameworks, HuggingGPT, AutoGPT, WebGPT, and WebCPM. Augmented Language Models Toolformer and Tool Learning (How LLMs use tools) HuggingGPT HuggingGPT is a category of tool-augmented learning in tool learning. Specifically, it is […]

CVPR 2023|BCP: Bidirectional Copy-Paste for Semi-Supervised Medical Image Segmentation

Click the card below to follow the “CVer” official account AI/CV heavy dry goods, delivered in the first time Click to enter->【Medical Imaging】WeChat Technology Exchange Group Reprinted from: Jishi Platform | Author: GlobalTrack Guide In semi-supervised medical image segmentation, there is an empirical mismatch problem between labeled and unlabeled data distributions. This paper proposes a […]

JDBC and DBCP configuration files (for personal use)

Every time you use jdbc, you have to search it in the search engine, so why not write a blog directly? 1. JDBC 1. Use Maven to import dependencies <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.26</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.13.RELEASE</version> </dependency> 2. The structure diagram is as follows 3.BaseDao.java package com.it.www.util; import java.sql.*; /** * @projectName: spring_demo01 […]

[Solved] Avtiviti gets an error when creating a table: Error getting a new connection. Cause: org.apache.commons.dbcp.SQLNestedException

Problem description An error was reported when using Acitivity to create a ProcessEngineConfiguration object today The error is as follows org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Could not create connection to database server.) ### Error getting a new connection. Cause: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Could not create connection to database server.) ### Cause: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory […]