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目录
  1. 1. 简单阅读code
  2. 2. 简单阅读code记录
    1. 2.1. 自己的随手记 单一个mybatis，版本3.5.3
      1. 2.1.0.1. MybatisSetUp.java
    2. 2.1.1. 获取SqlSessionFactory
      1. 2.1.1.1. 解析配置文件
      2. 2.1.1.2. 构建org.apache.ibatis.session.Configuration
      3. 2.1.1.3. 构建org.apache.ibatis.binding.MapperRegistry
      4. 2.1.1.4. plugin
        1. 2.1.1.4.1. 初始化
    3. 2.1.2. sqlSession=sqlSessionFactory.openSession();
      1. 2.1.2.1. 关于plugin部分
        1. 2.1.2.1.1. 调用到Plugin
        2. 2.1.2.1.2. Plugin 反射 Intercept
    4. 2.1.3. 获取mapper
      1. 2.1.3.1. sql
      2. 2.1.3.2. resultHandler
Mybatis简单阅读code
|备记
阅读量:|评论数:

简单阅读code

其他人的例子

深度分析：mybatis的底层实现原理

简单阅读code记录

自己的随手记 单一个mybatis，版本3.5.3

MybatisSetUp.java
java
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String resource = "mybatis-config.xml";
		InputStream inputStream=null;
		SqlSession sqlSession=null;
		try {
			inputStream = Resources.getResourceAsStream(resource);
			SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream,"mysql");

			sqlSession=sqlSessionFactory.openSession();

			try{
				LockDemoMapper lockDemoMapper=sqlSession.getMapper(LockDemoMapper.class);
				LockDemo lockDemo=lockDemoMapper.selectBalance(1);
				String resultString=ReflectionToStringBuilder.toString(lockDemo);
				logger.info("查询结果={}",resultString);

				lockDemoMapper.addBalance(new BigDecimal("1.3"),1);
				sqlSession.commit();

			}catch (Throwable t){
				logger.error("{}",t);
				if(sqlSession!=null){
					sqlSession.rollback();
				}
			}
		} catch (IOException e) {
			logger.error("",e);

		} finally{
			if(sqlSession!=null){
				sqlSession.close();
			}
			if(inputStream!=null){
				try {
					inputStream.close();
				} catch (IOException e) {
					logger.error("",e);
				}
			}
		}

获取SqlSessionFactory

解析配置文件
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SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream,"mysql");
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parseConfiguration:106, XMLConfigBuilder (org.apache.ibatis.builder.xml)
parse:98, XMLConfigBuilder (org.apache.ibatis.builder.xml)
build:78, SqlSessionFactoryBuilder (org.apache.ibatis.session)
build:68, SqlSessionFactoryBuilder (org.apache.ibatis.session)
main:27, MybatisSetUp (cn.demo.stdemo)

构建org.apache.ibatis.session.Configuration
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private void parseConfiguration(XNode root) {
        try {
            this.propertiesElement(root.evalNode("properties"));
            Properties settings = this.settingsAsProperties(root.evalNode("settings"));
            this.loadCustomVfs(settings);
            this.loadCustomLogImpl(settings);
            this.typeAliasesElement(root.evalNode("typeAliases"));
            this.pluginElement(root.evalNode("plugins"));
            this.objectFactoryElement(root.evalNode("objectFactory"));
            this.objectWrapperFactoryElement(root.evalNode("objectWrapperFactory"));
            this.reflectorFactoryElement(root.evalNode("reflectorFactory"));
            this.settingsElement(settings);
            this.environmentsElement(root.evalNode("environments"));
            this.databaseIdProviderElement(root.evalNode("databaseIdProvider"));
            this.typeHandlerElement(root.evalNode("typeHandlers"));
            this.mapperElement(root.evalNode("mappers"));
        } catch (Exception var3) {
            throw new BuilderException("Error parsing SQL Mapper Configuration. Cause: " + var3, var3);
        }
    }
构建org.apache.ibatis.binding.MapperRegistry
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mapperElement:362, XMLConfigBuilder (org.apache.ibatis.builder.xml)
parseConfiguration:119, XMLConfigBuilder (org.apache.ibatis.builder.xml)
parse:98, XMLConfigBuilder (org.apache.ibatis.builder.xml)
build:78, SqlSessionFactoryBuilder (org.apache.ibatis.session)
build:68, SqlSessionFactoryBuilder (org.apache.ibatis.session)
main:27, MybatisSetUp (cn.demo.stdemo)
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private void mapperElement(XNode parent) throws Exception {
        if (parent != null) {
            Iterator var2 = parent.getChildren().iterator();

            while(true) {
                while(var2.hasNext()) {
                    XNode child = (XNode)var2.next();
                    String resource;
                    if ("package".equals(child.getName())) {
                        resource = child.getStringAttribute("name");
                        this.configuration.addMappers(resource);
                    } else {
                        resource = child.getStringAttribute("resource");
                        String url = child.getStringAttribute("url");
                        String mapperClass = child.getStringAttribute("class");
                        XMLMapperBuilder mapperParser;
                        InputStream inputStream;
                        if (resource != null && url == null && mapperClass == null) {
                            ErrorContext.instance().resource(resource);
                            inputStream = Resources.getResourceAsStream(resource);
                            mapperParser = new XMLMapperBuilder(inputStream, this.configuration, resource, this.configuration.getSqlFragments());
                            mapperParser.parse();
                        } else if (resource == null && url != null && mapperClass == null) {
                            ErrorContext.instance().resource(url);
                            inputStream = Resources.getUrlAsStream(url);
                            mapperParser = new XMLMapperBuilder(inputStream, this.configuration, url, this.configuration.getSqlFragments());
                            mapperParser.parse();
                        } else {
                            if (resource != null || url != null || mapperClass == null) {
                                throw new BuilderException("A mapper element may only specify a url, resource or class, but not more than one.");
                            }

                            Class<?> mapperInterface = Resources.classForName(mapperClass);
                            this.configuration.addMapper(mapperInterface);
                        }
                    }
                }

                return;
            }
        }
    }

plugin
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addInterceptor:37, InterceptorChain (org.apache.ibatis.plugin)
addInterceptor:763, Configuration (org.apache.ibatis.session)
pluginElement:190, XMLConfigBuilder (org.apache.ibatis.builder.xml)
parseConfiguration:110, XMLConfigBuilder (org.apache.ibatis.builder.xml)
parse:98, XMLConfigBuilder (org.apache.ibatis.builder.xml)
build:78, SqlSessionFactoryBuilder (org.apache.ibatis.session)
build:68, SqlSessionFactoryBuilder (org.apache.ibatis.session)
main:27, MybatisSetUp (cn.demo.stdemo)
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private void pluginElement(XNode parent) throws Exception {
        if (parent != null) {
            Iterator var2 = parent.getChildren().iterator();

            while(var2.hasNext()) {
                XNode child = (XNode)var2.next();
                String interceptor = child.getStringAttribute("interceptor");
                Properties properties = child.getChildrenAsProperties();
                Interceptor interceptorInstance = (Interceptor)this.resolveClass(interceptor).getDeclaredConstructor().newInstance();
                interceptorInstance.setProperties(properties);
                this.configuration.addInterceptor(interceptorInstance);
            }
        }

    }
初始化
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<init>:40, Plugin (org.apache.ibatis.plugin)
wrap:49, Plugin (org.apache.ibatis.plugin)
plugin:28, Interceptor (org.apache.ibatis.plugin)
pluginAll:31, InterceptorChain (org.apache.ibatis.plugin)
newExecutor:615, Configuration (org.apache.ibatis.session)
openSessionFromDataSource:96, DefaultSqlSessionFactory (org.apache.ibatis.session.defaults)
openSession:47, DefaultSqlSessionFactory (org.apache.ibatis.session.defaults)
main:29, MybatisSetUp (cn.demo.stdemo)

sqlSession=sqlSessionFactory.openSession();

关于plugin部分
调用到Plugin
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invoke:61, Plugin (org.apache.ibatis.plugin)
update:-1, $Proxy5 (com.sun.proxy)
update:197, DefaultSqlSession (org.apache.ibatis.session.defaults)
execute:67, MapperMethod (org.apache.ibatis.binding)
invoke:93, MapperProxy (org.apache.ibatis.binding)
addBalance:-1, $Proxy6 (com.sun.proxy)
main:37, MybatisSetUp (cn.demo.stdemo)
Plugin 反射 Intercept
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intercept:27, ExamplePlugin (cn.demo.stdemo.plugin)
invoke:61, Plugin (org.apache.ibatis.plugin)
update:-1, $Proxy5 (com.sun.proxy)
update:197, DefaultSqlSession (org.apache.ibatis.session.defaults)
execute:67, MapperMethod (org.apache.ibatis.binding)
invoke:93, MapperProxy (org.apache.ibatis.binding)
addBalance:-1, $Proxy6 (com.sun.proxy)
main:37, MybatisSetUp (cn.demo.stdemo)

获取mapper

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newInstance:424, Constructor (java.lang.reflect)
newProxyInstance:739, Proxy (java.lang.reflect)
newInstance:47, MapperProxyFactory (org.apache.ibatis.binding)
newInstance:52, MapperProxyFactory (org.apache.ibatis.binding)
getMapper:50, MapperRegistry (org.apache.ibatis.binding)
getMapper:779, Configuration (org.apache.ibatis.session)
getMapper:291, DefaultSqlSession (org.apache.ibatis.session.defaults)
main:32, MybatisSetUp (cn.demo.stdemo)
sql
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parseStatementNode:57, XMLStatementBuilder (org.apache.ibatis.builder.xml)
buildStatementFromContext:137, XMLMapperBuilder (org.apache.ibatis.builder.xml)
buildStatementFromContext:130, XMLMapperBuilder (org.apache.ibatis.builder.xml)
configurationElement:120, XMLMapperBuilder (org.apache.ibatis.builder.xml)
parse:94, XMLMapperBuilder (org.apache.ibatis.builder.xml)
mapperElement:374, XMLConfigBuilder (org.apache.ibatis.builder.xml)
parseConfiguration:119, XMLConfigBuilder (org.apache.ibatis.builder.xml)
parse:98, XMLConfigBuilder (org.apache.ibatis.builder.xml)
build:78, SqlSessionFactoryBuilder (org.apache.ibatis.session)
build:68, SqlSessionFactoryBuilder (org.apache.ibatis.session)
main:27, MybatisSetUp (cn.demo.stdemo)
resultHandler
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handleResult:43, DefaultResultHandler (org.apache.ibatis.executor.result)
callResultHandler:370, DefaultResultSetHandler (org.apache.ibatis.executor.resultset)
storeObject:363, DefaultResultSetHandler (org.apache.ibatis.executor.resultset)
handleRowValuesForSimpleResultMap:355, DefaultResultSetHandler (org.apache.ibatis.executor.resultset)
handleRowValues:328, DefaultResultSetHandler (org.apache.ibatis.executor.resultset)
handleResultSet:301, DefaultResultSetHandler (org.apache.ibatis.executor.resultset)
handleResultSets:194, DefaultResultSetHandler (org.apache.ibatis.executor.resultset)
query:65, PreparedStatementHandler (org.apache.ibatis.executor.statement)
query:79, RoutingStatementHandler (org.apache.ibatis.executor.statement)
doQuery:63, SimpleExecutor (org.apache.ibatis.executor)
queryFromDatabase:324, BaseExecutor (org.apache.ibatis.executor)
query:156, BaseExecutor (org.apache.ibatis.executor)
query:109, CachingExecutor (org.apache.ibatis.executor)
query:83, CachingExecutor (org.apache.ibatis.executor)
invoke0:-1, NativeMethodAccessorImpl (sun.reflect)
invoke:62, NativeMethodAccessorImpl (sun.reflect)
invoke:43, DelegatingMethodAccessorImpl (sun.reflect)
invoke:498, Method (java.lang.reflect)
invoke:63, Plugin (org.apache.ibatis.plugin)
query:-1, $Proxy5 (com.sun.proxy)
selectList:147, DefaultSqlSession (org.apache.ibatis.session.defaults)
selectList:140, DefaultSqlSession (org.apache.ibatis.session.defaults)
selectOne:76, DefaultSqlSession (org.apache.ibatis.session.defaults)
execute:87, MapperMethod (org.apache.ibatis.binding)
invoke:93, MapperProxy (org.apache.ibatis.binding)
selectBalance:-1, $Proxy6 (com.sun.proxy)
main:33, MybatisSetUp (cn.demo.stdemo)
文章作者: thf
文章链接: http://pcbopcbo.github.io/2020/07/10/2020071017/
版权声明: 本博客所有文章除特别声明外，均采用 CC BY-NC-SA 4.0 许可协议。转载请注明来自 漂泊的个人笔记！
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