21. Spring Boot Druid 数据源配置解析

1、数据源配置属性类源码

package org.springframework.boot.autoconfigure.jdbc;

@ConfigurationProperties(
    prefix = "spring.datasource"
)
public class DataSourceProperties implements BeanClassLoaderAware, InitializingBean {
    private ClassLoader classLoader;
    private String name;
    private boolean generateUniqueName;
    private Class<? extends DataSource> type;
    private String driverClassName;
    private String url;
    private String username;
    private String password;
    private String jndiName;
    private DataSourceInitializationMode initializationMode;
    private String platform;
    private List<String> schema;
    private String schemaUsername;
    private String schemaPassword;
    private List<String> data;
    private String dataUsername;
    private String dataPassword;
    private boolean continueOnError;
    private String separator;
    private Charset sqlScriptEncoding;
    private EmbeddedDatabaseConnection embeddedDatabaseConnection;
    private DataSourceProperties.Xa xa;
    private String uniqueName;
    ......
}

详见Spring Boot 2.1.0文档

2、配置

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:/springboot?useSSL=false
    username: root
    password: xiaochao
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    initialization-mode: ALWAYS
    schema-username: root
    schema-password: xiaochao
    schema:
      - classpath:schema.sql
    data-username: root
    data-password: xiaochao
#    hikari:
#      username: root
#      password: xiaochao
#      jdbc-url: jdbc:mysql://localhost:/springboot?useSSL=false
#      driver-class-name: com.mysql.cj.jdbc.Driver
#      schema:
#        - classpath:schema.sql
server:
  port: 

注意：schema.sql 没有生效，待解！！！

 3、注解注入数据源类型和配置过滤器类和Servelt类

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

import javax.sql.DataSource;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.ResourceServlet;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;

@Configuration
public class MyConfig {

    @Bean
    @ConfigurationProperties("spring.datasource")
    public DataSource dataSource() {
        //对应DataSourceConfiguration类下的几个类型
        //javax.sql.DataSource (Generic)
        //BasicDataSource (Dbcp2)
        //HikariDataSource (Hikari)
        //org.apache.tomcat.jdbc.pool.DataSource (tomcat)
        return DataSourceBuilder.create().type(DruidDataSource.class).build();
    }

    //配置Druid数据源的Servelt
    @Bean
    public ServletRegistrationBean<StatViewServlet> statViewServlet() {
        ServletRegistrationBean<StatViewServlet> servlet = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");

        Map<String,String> initParam = new HashMap<>();
        initParam.put(ResourceServlet.PARAM_NAME_USERNAME,"admin");
        initParam.put(ResourceServlet.PARAM_NAME_PASSWORD,"123456");
        initParam.put(ResourceServlet.PARAM_NAME_ALLOW,"");//默认允许所有地址来源的访问
        initParam.put(ResourceServlet.PARAM_NAME_DENY,"192.168.1.234");

        servlet.setInitParameters(initParam);
        return servlet;
    }
    //配置Druid数据源的过滤器
    @Bean
    public FilterRegistrationBean<WebStatFilter> StatViewFilter() {
        WebStatFilter druidFilter = new WebStatFilter();
        FilterRegistrationBean<WebStatFilter> filterBean = new FilterRegistrationBean<>(druidFilter);

        Map<String,String> initParam = new HashMap<>();
        initParam.put(WebStatFilter.PARAM_NAME_EXCLUSIONS,"*.js,*.css,/druid/*");
        filterBean.setUrlPatterns(Arrays.asList("/*")); //过滤所有请求
        filterBean.setInitParameters(initParam);
        return filterBean;
    }

}