MySQL-druid连接报错问题

JavaEE, MySQL

报错问题

1
com.alibaba.druid.pool.DruidDataSource   : create connection SQLException, url: jdbc:mysql://xxx.xxx.xxx.xxx:3306/xxx?useUnicode=true&characterEncoding=UTF-8, errorCode 0, state 08S01

SpringBoot配置

  • application.properties
1
2
3
4
5
6
7
spring.application.name=xxx
server.port=8080
spring.datasource.url=jdbc:mysql://xxx.xxx.xxx.xxx:3306/xxx?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=xxx
spring.datasource.password=xxx
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
查看更多
MySQL - JavaEE

Java工具类-二维码生成和解析

JavaEE, Java工具类

zxing生成和解析二维码

pom.xml

1
2
3
4
5
6
7
8
9
10
11
12
<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>core</artifactId>
    <version>3.3.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
<dependency>
    <groupId>com.google.zxing</groupId>
    <artifactId>javase</artifactId>
    <version>3.3.0</version>
</dependency>
查看更多
JavaEE

JavaEE-SpingMVC之log4j日志配置

JavaEE, SpringMVC

web.xml 添加配置

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
<!-- Spring的log4j监听器 -->
<context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>webapp.root1</param-value>
</context-param>
<context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>classpath:log4j.properties</param-value>
</context-param>
<context-param>
    <param-name>log4jRefreshInterval</param-name>
    <param-value>6000</param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
查看更多
JavaEE

JavaEE-使用itext生成PDF总结

JavaEE, SpringMVC

添加pom依赖

1
2
3
4
5
6
7
8
9
10
11
12
<!-- pdf start-->
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.11</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext-asian</artifactId>
    <version>5.2.0</version>
</dependency>
<!-- pdf end -->
查看更多
JavaEE