{"id":4058,"date":"2019-03-28T17:23:45","date_gmt":"2019-03-28T09:23:45","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=4058"},"modified":"2019-03-28T17:23:45","modified_gmt":"2019-03-28T09:23:45","slug":"%e6%89%8b%e6%8a%8a%e6%89%8b%e6%95%99%e4%bd%a0%e5%88%a9%e7%94%a8-springboot-mybatis-%e5%ae%9e%e7%8e%b0%e4%b8%80%e4%b8%aa%e8%af%bb%e5%86%99%e5%88%86%e5%ba%93%e9%a1%b9%e7%9b%ae","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=4058","title":{"rendered":"\u624b\u628a\u624b\u6559\u4f60\u5229\u7528 SpringBoot + Mybatis \u5b9e\u73b0\u4e00\u4e2a\u8bfb\u5199\u5206\u5e93\u9879\u76ee"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u6628\u5929\uff0c\u6211\u53d1\u4e86\u4e00\u7bc7\u5173\u4e8e Spring \u8111\u56fe\u7684\u5b66\u4e60\u77e5\u8bc6\u4f53\u7cfb\uff0c\u5305\u62ec\u539f\u7406\uff0c\u6e90\u7801\u89e3\u6790\uff0c\u7ed3\u5408\u8bbe\u8ba1\u6a21\u5f0f\u7b49\u3002\u6ca1\u60f3\u5230\u975e\u5e38\u7684\u706b\u7206\uff0c\u5fae\u4fe1\u901a\u8baf\u5f55\u91cc\u4e00\u4e0b\u5b50\u591a\u4e86\u5f88\u591a\u597d\u53cb\u3002\u6211\u9884\u8ba1\u5728\u4eca\u5e74 5 \u6708\u4efd\u5de6\u53f3\u901a\u8baf\u5f55\u4f1a\u8fbe\u5230 5000 \u4eba\u7684\u4e0a\u9650\u3002\u76ee\u7684\u8fd8\u662f\u5e0c\u671b\u5927\u5bb6\u76f8\u4e92\u4ea4\u6d41\uff0c\u5171\u540c\u8fdb\u6b65\uff0c\u76f8\u4e92\u9f13\u52b1\uff01 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e92\u8054\u7f51\u6280\u672f\u98de\u901f\u53d1\u5c55\u7684\u4eca\u5929\uff0c\u5404\u79cd\u6280\u672f\u5df2\u7ecf\u975e\u5e38\u6210\u719f\uff0c\u5c24\u5176\u662f\u50cf\u8bfb\u5199\u5206\u79bb\u8fd9\u6837\u7684\u67b6\u6784\uff0c\u4ee5\u53ca\u8fd9\u6837\u7684\u9879\u76ee\u663e\u5f97\u975e\u5e38\u7684\u5e38\u89c1\u3002\u90a3\u4e48\u4eca\u5929\u6211\u5c31\u548c\u5927\u5bb6\u4e00\u8d77\u6765\uff0c\u624b\u628a\u624b\u7684\u6559\u5927\u5bb6\u5229\u7528 SpringBoot + Mybatis \u5b9e\u73b0\u4e00\u4e2a\u8bfb\u5199\u5206\u5e93\u7684 demo \u9879\u76ee\u3002 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\uff0c\u6211\u4eec\u8fd9\u4e2a\u9879\u76ee\u8981\u4f7f\u7528 SpringBoot\uff0c\u56e0\u4e3a SpringBoot \u662f\u73b0\u9636\u6bb5\u6700\u706b\u7684\u6846\u67b6\u4e4b\u4e00\u4e86\uff1b\u7b2c\u4e8c\uff0c\u6211\u4eec\u8981\u4f7f\u7528 Mybatis\uff1b\u7b2c\u4e09\uff0c\u6211\u4eec\u8fd8\u8981\u4f7f\u7528\u81ea\u5b9a\u4e49\u6ce8\u89e3\u3002 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u4ecb\u7ecd\u51e0\u4e2a\u4e3b\u8981\u7684\u7c7b\u5b9e\u73b0\uff0c\u9700\u8981\u6e90\u7801\u7684\u53ef\u4ee5\u52a0\u6211\u5fae\u4fe1\u53f7\uff1axmtxtt \u4e3a\u597d\u53cb\uff0c\u6211\u514d\u8d39\u53d1\u7ed9\u5927\u5bb6\uff01 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5148\u521b\u5efa\u4e00\u4e2a\u00a0DataSources \u6570\u636e\u6e90\u63a5\u53e3\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u5047\u8bbe\u662f\u4e00\u4e3b\u4e00\u4ece\u3002 <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public interface DataSources {\n    String MASTER_DB = \"masterDB\";\n    String SLAVE_DB = \"slaveDB\";\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u6b65\uff0c\u521b\u5efa\u4e00\u4e2a\u5207\u6362\u6570\u636e\u6e90\u7684 RoutingDataSource \u6ce8\u89e3\u7c7b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Retention(RetentionPolicy.RUNTIME)\n@Target({\n        ElementType.METHOD\n})\npublic @interface RoutingDataSource {\n    String value() default DataSources.MASTER_DB;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u89e3\u7684\u4f7f\u7528\u6211\u5c31\u4e0d\u5728\u8fc7\u591a\u7684\u89e3\u91ca\u4e86\uff0c\u5c31\u5f53\u5927\u5bb6\u90fd\u4f1a\u5427\uff0c\u5982\u679c\u4e0d\u4f1a\u52a0\u7fa4\u4ea4\u6d41\uff0c\u597d\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e09\u6b65\uff0c\u5728 application.yml \u4e2d\u914d\u7f6e\u591a\u4e2a\u6570\u636e\u6e90\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>spring:\n  datasource:\n    url: jdbc:mysql:\/\/127.0.0.1:3306\/xttblog\n    username: xttblog\n    password: xttblog\n    driver-class-name: com.mysql.jdbc.Driver\n    type: com.alibaba.druid.pool.DruidDataSource\n  datasourceSlave:\n    url: jdbc:mysql:\/\/127.0.0.1:3306\/xttblog\n    username: xttblog\n    password: xttblog\n    driver-class-name: com.mysql.jdbc.Driver\n    type: com.alibaba.druid.pool.DruidDataSource<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u56db\u6b65\uff0c\u914d\u7f6e\u591a\u4e2a Datasource\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Configuration\npublic class DatasourceConfig {\n    @Bean(destroyMethod =  \"close\", name = DataSources.MASTER_DB)\n    @ConfigurationProperties(prefix = \"spring.datasource\")\n    public DataSource dataSource() {\n        return DataSourceBuilder.create().type(DruidDataSource.class).build();\n    }\n    @Bean(destroyMethod =  \"close\", name = DataSources.SLAVE_DB)\n    @ConfigurationProperties(prefix = \"spring.datasourceSlave\")\n    public DataSource dataSourceSlave() {\n        return DataSourceBuilder.create().type(DruidDataSource.class).build();\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e94\u6b65\uff0c\u5b9a\u4e49\u4e00\u4e2a DataSourceHolder\uff0c\u5207\u6362\u6570\u636e\u6e90\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class DataSourceHolder {\n    \/**\n     * \u9ed8\u8ba4\u6570\u636e\u6e90\n     *\/\n    public static final String DEFAULT_DATASOURCE = DataSources.MASTER_DB;\n    private static final ThreadLocal&lt;String&gt; contextHolder = new ThreadLocal&lt;&gt;();\n    \/\/ \u8bbe\u7f6e\u6570\u636e\u6e90\u540d\n    public static void setDB(String dbType) {\n        System.out.println(\"\u5207\u6362\u5230\" + dbType + \"\u6570\u636e\u6e90\");\n        contextHolder.set(dbType);\n    }\n    \/\/ \u83b7\u53d6\u6570\u636e\u6e90\u540d\n    public static String getDB() {\n        return (contextHolder.get());\n    }\n    \/\/ \u6e05\u9664\u6570\u636e\u6e90\u540d\n    public static void clearDB() {\n        contextHolder.remove();\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u516d\u6b65\uff0c\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u6570\u636e\u6e90\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class DynamicDataSource extends AbstractRoutingDataSource {\n    @Override\n    protected Object determineCurrentLookupKey() {\n        return DataSourceHolder.getDB();\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e03\u6b65\uff0cMybatis \u6574\u5408\u52a8\u6001\u6570\u636e\u6e90\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Configuration\npublic class MybatisDynamicDataSourceConfig {\n    @Autowired\n    @Qualifier(DataSources.MASTER_DB)\n    private DataSource masterDB;\n    @Autowired\n    @Qualifier(DataSources.SLAVE_DB)\n    private DataSource slaveDB;\n    \/**\n     * \u52a8\u6001\u6570\u636e\u6e90\n     *\/\n    @Bean(name = \"dynamicDataSource\")\n    public DataSource dynamicDataSource() {\n        DynamicDataSource dynamicDataSource = new DynamicDataSource();\n        \/\/ \u9ed8\u8ba4\u6570\u636e\u6e90\n        dynamicDataSource.setDefaultTargetDataSource(masterDB);\n\n        \/\/ \u914d\u7f6e\u591a\u6570\u636e\u6e90\n        Map&lt;Object, Object&gt; dsMap = Maps.newHashMap();\n        dsMap.put(DataSources.MASTER_DB, masterDB);\n        dsMap.put(DataSources.SLAVE_DB, slaveDB);\n        dynamicDataSource.setTargetDataSources(dsMap);\n        return dynamicDataSource;\n    }\n    @Bean\n    @ConfigurationProperties(prefix = \"mybatis\")\n    public SqlSessionFactoryBean sqlSessionFactoryBean() {\n        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();\n        \/\/ \u914d\u7f6e\u6570\u636e\u6e90\uff0c\u6b64\u5904\u914d\u7f6e\u4e3a\u5173\u952e\u914d\u7f6e\uff0c\u5982\u679c\u6ca1\u6709\u5c06 dynamicDataSource \u4f5c\u4e3a\u6570\u636e\u6e90\u5219\u4e0d\u80fd\u5b9e\u73b0\u5207\u6362\n        sqlSessionFactoryBean.setDataSource(dynamicDataSource());\n        return sqlSessionFactoryBean;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u516b\u6b65\uff0c\u4e5f\u662f\u6700\u91cd\u8981\u7684\u4e00\u6b65\uff0c\u62e6\u622a\u6240\u6709\u6709 @RoutingDataSource \u6ce8\u89e3\u7684\u65b9\u6cd5\u3002\u52a8\u6001\u7684\u7ed9\u5b83\u6307\u5b9a\u6570\u636e\u6e90\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Aspect\n@Component\npublic class XttblogDynamicDataSourceAspect {\n    @Before(\"@annotation(com.xttblog.sharding.RoutingDataSource)\")\n    public void doBeforeSwitchDataSource(ProceedingJoinPoint point){\n        \/\/\u83b7\u5f97\u5f53\u524d\u8bbf\u95ee\u7684class\n        Class&lt;?&gt; className = point.getTarget().getClass();\n        \/\/\u83b7\u5f97\u8bbf\u95ee\u7684\u65b9\u6cd5\u540d\n        String methodName = point.getSignature().getName();\n        Signature signature =point.getSignature();\n        MethodSignature methodSignature = (MethodSignature)signature;\n        \/\/\u5f97\u5230\u65b9\u6cd5\u7684\u53c2\u6570\u7684\u7c7b\u578b\n        Class[] argClass = methodSignature.getMethod().getParameterTypes();\n        String dataSource = DataSourceHolder.DEFAULT_DATASOURCE;\n        try {\n            \/\/ \u5f97\u5230\u8bbf\u95ee\u7684\u65b9\u6cd5\u5bf9\u8c61\n            Method method = className.getMethod(methodName, argClass);\n            \/\/ \u5224\u65ad\u662f\u5426\u5b58\u5728@DS\u6ce8\u89e3\n            if (method.isAnnotationPresent(RoutingDataSource.class)) {\n                RoutingDataSource annotation = method.getAnnotation(RoutingDataSource.class);\n                \/\/ \u53d6\u51fa\u6ce8\u89e3\u4e2d\u7684\u6570\u636e\u6e90\u540d\n                dataSource = annotation.value();\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n        \/\/ \u5207\u6362\u6570\u636e\u6e90\n        DataSourceHolder.setDB(dataSource);\n    }\n    @After(\"@annotation(com.xttblog.sharding.RoutingDataSource)\")\n    public void doAfterSwitchDataSource(JoinPoint point){\n        DataSourceHolder.clearDB();\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e5d\u6b65\uff0c\u8981\u53d6\u6d88\u81ea\u52a8\u914d\u7f6e\u6570\u636e\u6e90\uff0c\u4e0d\u8981\u8ba9 SpringBoot \u81ea\u52a8\u7684\u4f7f\u7528 DataSourceAutoConfiguration \u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})\npublic class XttblogApplication {\n    public static void main(String[] args) {\n        SpringApplication.run(XttblogApplication.class,args);\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\u5c31\u662f\u5982\u4f55\u4f7f\u7528\u4e86\uff0c\u63d2\u5165\u6211\u4eec\u4f7f\u7528\u4e3b\u5e93\uff0c\u67e5\u8be2\u6211\u4eec\u4f7f\u7528\u4ece\u5e93\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Service\npublic class XttblogService {\n    @Autowired\n    private XttblogMapper xttblogMapper;\n    @RoutingDataSource(DataSources.MASTER_DB)\n    public int insert(Xttblog xttblog) {\n        return xttblogMapper.insertXttblog(xttblog.getName());\n    }\n    @RoutingDataSource(DataSources.SLAVE_DB)\n    public Xttblog select(Long id) {\n        return xttblogMapper.selectXttblogById(id);\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u6e90\u7801\uff0c\u9700\u8981\u7684\u53ef\u4ee5\u52a0\u6211\u5fae\u4fe1\u53f7\uff1axmtxtt \u4e3a\u597d\u53cb\uff0c\u6211\u514d\u8d39\u53d1\u7ed9\u5927\u5bb6\uff01<\/p>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=4058\">\u624b\u628a\u624b\u6559\u4f60\u5229\u7528 SpringBoot + Mybatis \u5b9e\u73b0\u4e00\u4e2a\u8bfb\u5199\u5206\u5e93\u9879\u76ee<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>\u6628\u5929\uff0c\u6211\u53d1\u4e86\u4e00\u7bc7\u5173\u4e8e Spring \u8111\u56fe\u7684\u5b66\u4e60\u77e5\u8bc6\u4f53\u7cfb\uff0c\u5305\u62ec\u539f\u7406\uff0c\u6e90\u7801\u89e3\u6790\uff0c\u7ed3\u5408\u8bbe\u8ba1\u6a21\u5f0f\u7b49\u3002\u6ca1\u60f3\u5230\u975e\u5e38\u7684\u706b\u7206\uff0c [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[1511,841,1037,393,1522],"class_list":["post-4058","post","type-post","status-publish","format-standard","hentry","category-java","tag-aop","tag-datasource","tag-mybatis","tag-mysql","tag-springboot"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4058"}],"version-history":[{"count":1,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4058\/revisions"}],"predecessor-version":[{"id":4059,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4058\/revisions\/4059"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}