spring boot中使用druid多数据源配置Mybatis_druid切换数据源后 mybatis xml中timeout参数无效-优快云博客

本文介绍如何在Spring Boot项目中整合Druid数据源和MyBatis框架，包括配置多数据源、实现数据库连接池监控以及解决非默认数据源的事物处理问题。

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首选必须吐槽下，不知道是我读书太少，还是Spring boot确实对druid和mybatis的支持不好，奈何用怪了druid的数据库、sql、url监控和mybatis数据源，只有硬着头皮上了。

相关配置

常例先给出build.gradle配置

"org.mybatis.spring.boot:mybatis-spring-boot-starter:1.2.0",
"mysql:mysql-connector-java:5.1.38",
"com.alibaba:druid:1.0.26"

druid的相关配置（虽然是放在默认配置中，但压根就不会自动加载）

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
# 下面为连接池的补充设置，应用到上面所有数据源中
# 初始化大小，最小，最大
spring.datasource.initialSize=8
spring.datasource.minIdle=1
spring.datasource.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.maxWait=60000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒 
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小 
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙 
spring.datasource.filters=stat, wall

接着是两个数据源配置

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://ip1:3306/springboot?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=xxxx
spring.datasource.password=xxxx

spring.datasource.siva.url=jdbc:mysql://ip2:3306/siva?useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.siva.username=xxx
spring.datasource.siva.password=xxx

druid的Servlet及拦截器

由于不存在web.xml文件，需要在java代码中进行配置

@Bean
public ServletRegistrationBean druidServlet() {
    ServletRegistrationBean reg = new ServletRegistrationBean();
    reg.setServlet(new StatViewServlet());
    reg.addUrlMappings("/druid/*");
    reg.addInitParameter("loginUsername", "sivannnn");
    reg.addInitParameter("loginPassword", "123456");
    return reg;
}

@Bean
public FilterRegistrationBean filterRegistrationBean() {
    FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
    filterRegistrationBean.setFilter(new WebStatFilter());
    filterRegistrationBean.addUrlPatterns("/*");
    filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
    filterRegistrationBean.addInitParameter("profileEnable", "true");
    filterRegistrationBean.addInitParameter("principalCookieName", "USER_COOKIE");
    filterRegistrationBean.addInitParameter("principalSessionName", "USER_SESSION");
    return filterRegistrationBean;
}

数据源配置

采用多数据源的情况下，要求必须有一个数据源为”主”.

...参数已经略去
@Bean(name = "rdsDataSource")
@Primary
public DataSource rdsDataSource() {
    DruidDataSource datasource = new DruidDataSource();
    datasource.setUrl(this.dbUrl);
    datasource.setUsername(username);
    datasource.setPassword(password);
    datasource.setDriverClassName(driverClassName);
    datasource.setInitialSize(initialSize);
    datasource.setMinIdle(minIdle);
    datasource.setMaxActive(maxActive);
    datasource.setMaxWait(maxWait);
     datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
    datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
    datasource.setValidationQuery(validationQuery);
    datasource.setTestWhileIdle(testWhileIdle);
    datasource.setTestOnBorrow(testOnBorrow);
    datasource.setTestOnReturn(testOnReturn);
    datasource.setPoolPreparedStatements(poolPreparedStatements);
    try {
        datasource.setFilters(filters);
    } catch (SQLException e) {
        e.printStackTrace();
    }
    return datasource;
 }

@Bean(name = "rdsTransactionManager")
@Primary
public DataSourceTransactionManager rdsTransactionManager() {
    return new DataSourceTransactionManager(rdsDataSource());
}

@Bean(name = "rdsSqlSessionFactory")
@Primary
public SqlSessionFactory rdsSqlSessionFactory(@Qualifier("rdsDataSource") DataSource rdsDataSource)
        throws Exception {
    final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
    sessionFactory.setDataSource(rdsDataSource);
    return sessionFactory.getObject();
}