原文：https://blog.csdn.net/u012326462/article/details/82080812
1.使用springboot jdbc初始化数据库
spring:
datasource:
username: xuhaixing
password: xuhaixing
url: jdbc:mysql://192.168.94.151:3306/mytest?useUnicode=true&characterEncoding=utf8&characterSetResults=utf8
driver-class-name: com.mysql.jdbc.Driver
platform: mysql
#启动时需要初始化的建表语句
schema: classpath:schema-mysql.sql
#初始化的数据
data: classpath:data-mysql.sql
# Initialize the datasource with available DDL and DML scripts.
initialization-mode: always
continue-on-error: false
#data-password:
#data-username:
#schema-password:
#schema-username:
sql-script-encoding: utf-8
separator: ;
spring.datasource下有两个属性 schme、data，其中schema为表初始化语句，data为数据初始化，默认加载schema.sql与data.sql。脚本位置可以通过spring.datasource.schema 与spring.datasource.data 来改变，源码如下：
/**
* Create the schema if necessary.
* @return {@code true} if the schema was created
* @see DataSourceProperties#getSchema()
*/
public boolean createSchema() {
List<Resource> scripts = getScripts("spring.datasource.schema",
this.properties.getSchema(), "schema");
if (!scripts.isEmpty()) {
if (!isEnabled()) {
logger.debug("Initialization disabled (not running DDL scripts)");
return false;
}
String username = this.properties.getSchemaUsername();
String password = this.properties.getSchemaPassword();
runScripts(scripts, username, password);
}
return !scripts.isEmpty();
}
/**
* Initialize the schema if necessary.
* @see DataSourceProperties#getData()
*/
public void initSchema() {
List<Resource> scripts = getScripts("spring.datasource.data",
this.properties.getData(), "data");
if (!scripts.isEmpty()) {
if (!isEnabled()) {
logger.debug("Initialization disabled (not running data scripts)");
return;
}
String username = this.properties.getDataUsername();
String password = this.properties.getDataPassword();
runScripts(scripts, username, password);
}
}
看getScripts源码，它还会加载schema-${platform}.sql文件，或者data-${platform}.sql文件，其中platform就是spring.datasource.platform的值
private List<Resource> getScripts(String propertyName, List<String> resources,
String fallback) {
if (resources != null) {
return getResources(propertyName, resources, true);
}
String platform = this.properties.getPlatform();
List<String> fallbackResources = new ArrayList<>();
fallbackResources.add("classpath*:" + fallback + "-" + platform + ".sql");
fallbackResources.add("classpath*:" + fallback + ".sql");
return getResources(propertyName, fallbackResources, false);
}
private List<Resource> getScripts(String propertyName, List<String> resources,
String fallback) {
if (resources != null) {
return getResources(propertyName, resources, true);
}
String platform = this.properties.getPlatform();
List<String> fallbackResources = new ArrayList<>();
fallbackResources.add("classpath*:" + fallback + "-" + platform + ".sql");
fallbackResources.add("classpath*:" + fallback + ".sql");
return getResources(propertyName, fallbackResources, false);
}
spring.datasource.initialization-mode 初始化模式（springboot2.0），其中有三个值，always为始终执行初始化，embedded只初始化内存数据库（默认值）,如h2等，never为不执行初始化。
/*
* Copyright 2012-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.jdbc;
/**
* Supported {@link javax.sql.DataSource} initialization modes.
*
* @author Vedran Pavic
* @author Stephane Nicoll
* @since 2.0.0
* @see AbstractDataSourceInitializer
*/
public enum DataSourceInitializationMode {
/**
* Always initialize the datasource.
*/
ALWAYS,
/**
* Only initialize an embedded datasource.
*/
EMBEDDED,
/**
* Do not initialize the datasource.
*/
NEVER
}
spring.datasouce.data-password:
spring.datasouce.data-username:
spring.datasouce.schema-password:
spring.datasouce.schema-username:
这四个值为执行schema.sql或者data.sql时，用的用户
spring.datasource.sql-script-encoding: utf-8 为文件的编码
spring.datasource.separator: ; 为sql脚本中语句分隔符
spring.datasource.continue-on-error: false 遇到语句错误时是否继续，若已经执行过某些语句，再执行可能会报错，可以忽略，不会影响程序启动