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spring boot使用DataSource初始化sql脚本
DataSource自动配置类 DataSourceAutoConfiguration
使用DataSourceInitializer初始化sql脚本的案例,使用DatabasePopulatorUtils工具类来执行脚本
/** 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.autoconfigure.jdbc;import java.util.ArrayList;
import java.util.Collections;
import java.util.List;import javax.annotation.PostConstruct;
import javax.sql.DataSource;import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;import org.springframework.boot.context.config.ResourceNotFoundException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.config.SortedResourcesFactoryBean;
import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils;
import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
import org.springframework.util.StringUtils;/*** Bean to handle {@link DataSource} initialization by running {@literal schema-*.sql} on* {@link PostConstruct} and {@literal data-*.sql} SQL scripts on a* {@link DataSourceInitializedEvent}.** @author Dave Syer* @author Phillip Webb* @author Eddú Meléndez* @author Stephane Nicoll* @author Kazuki Shimizu* @since 1.1.0* @see DataSourceAutoConfiguration*/
class DataSourceInitializer implements ApplicationListener<DataSourceInitializedEvent> {private static final Log logger = LogFactory.getLog(DataSourceInitializer.class);private final DataSourceProperties properties;private final ApplicationContext applicationContext;private DataSource dataSource;private boolean initialized = false;DataSourceInitializer(DataSourceProperties properties,ApplicationContext applicationContext) {this.properties = properties;this.applicationContext = applicationContext;}@PostConstructpublic void init() {if (!this.properties.isInitialize()) {logger.debug("Initialization disabled (not running DDL scripts)");return;}if (this.applicationContext.getBeanNamesForType(DataSource.class, false,false).length > 0) {this.dataSource = this.applicationContext.getBean(DataSource.class);}if (this.dataSource == null) {logger.debug("No DataSource found so not initializing");return;}runSchemaScripts();}private void runSchemaScripts() {List<Resource> scripts = getScripts("spring.datasource.schema",this.properties.getSchema(), "schema");if (!scripts.isEmpty()) {String username = this.properties.getSchemaUsername();String password = this.properties.getSchemaPassword();runScripts(scripts, username, password);try {this.applicationContext.publishEvent(new DataSourceInitializedEvent(this.dataSource));// The listener might not be registered yet, so don't rely on it.if (!this.initialized) {runDataScripts();this.initialized = true;}}catch (IllegalStateException ex) {logger.warn("Could not send event to complete DataSource initialization ("+ ex.getMessage() + ")");}}}@Overridepublic void onApplicationEvent(DataSourceInitializedEvent event) {if (!this.properties.isInitialize()) {logger.debug("Initialization disabled (not running data scripts)");return;}// NOTE the event can happen more than once and// the event datasource is not used hereif (!this.initialized) {runDataScripts();this.initialized = true;}}private void runDataScripts() {List<Resource> scripts = getScripts("spring.datasource.data",this.properties.getData(), "data");String username = this.properties.getDataUsername();String password = this.properties.getDataPassword();runScripts(scripts, username, password);}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<String>();fallbackResources.add("classpath*:" + fallback + "-" + platform + ".sql");fallbackResources.add("classpath*:" + fallback + ".sql");return getResources(propertyName, fallbackResources, false);}private List<Resource> getResources(String propertyName, List<String> locations,boolean validate) {List<Resource> resources = new ArrayList<Resource>();for (String location : locations) {for (Resource resource : doGetResources(location)) {if (resource.exists()) {resources.add(resource);}else if (validate) {throw new ResourceNotFoundException(propertyName, resource);}}}return resources;}private Resource[] doGetResources(String location) {try {SortedResourcesFactoryBean factory = new SortedResourcesFactoryBean(this.applicationContext, Collections.singletonList(location));factory.afterPropertiesSet();return factory.getObject();}catch (Exception ex) {throw new IllegalStateException("Unable to load resources from " + location,ex);}}private void runScripts(List<Resource> resources, String username, String password) {if (resources.isEmpty()) {return;}ResourceDatabasePopulator populator = new ResourceDatabasePopulator();populator.setContinueOnError(this.properties.isContinueOnError());populator.setSeparator(this.properties.getSeparator());if (this.properties.getSqlScriptEncoding() != null) {populator.setSqlScriptEncoding(this.properties.getSqlScriptEncoding().name());}for (Resource resource : resources) {populator.addScript(resource);}DataSource dataSource = this.dataSource;if (StringUtils.hasText(username) && StringUtils.hasText(password)) {dataSource = DataSourceBuilder.create(this.properties.getClassLoader()).driverClassName(this.properties.determineDriverClassName()).url(this.properties.determineUrl()).username(username).password(password).build();}DatabasePopulatorUtils.execute(populator, dataSource);}}这篇关于spring boot使用DataSource初始化sql脚本的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
