Spring框架-Java学习路线课程：Spring的扩展配置

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Spring的扩展配置

文章目录

1、使用properties属性文件方式配置数据源。
1.1、在applicationContext.xml配置文件中，引入database.properties配置文件：
   
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
	<property name="location">
        
		<value>classpath:database.propertiesvalue>		
	property>

bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
	
	<property name="driverClassName" value="${driver}">property>
	<property name="url" value="${url}">property>
	<property name="username" value="${user}">property>
	<property name="password" value="${password}">property>
bean>
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1.2、测试类使用Junit单元测试输出：
/*
 * add用户信息  UserService调用
 */
@Test
public void test() {
    ApplicationContext context = new ClassPathXmlApplicationContext(
        "applicationContext.xml");
    //原来是通过映射接口去调用
    //UserMapper userMapper = (UserMapper) context.getBean("userMapper");
    //获取所有JavaBean的名称
    String[] bean = context.getBeanDefinitionNames();
    for (String string : bean) {
        System.out.println(string);
    }
    //现在是通过业务接口去调用
    UserService service = (UserService) context.getBean("userService");
    User user = new User();
    user.setUserCode("zhangxiulian");
    user.setUserName("张秀连666");
    user.setUserPassword("123999");
    user.setGender(0);
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    try {
        user.setBirthday(sdf.parse("2010-9-17"));
    } catch (ParseException e) {
        e.printStackTrace();
    }
    user.setPhone("13608880888");
    user.setAddress("养育巷49");
    user.setUserRole(2);
    user.setCreatedBy(1);
    user.setCreationDate(new Date());
    Integer userRole = 2;
    //int num = userMapper.addUser(user);
    int num = service.saveUser(user);
    if (num > 0) {
        logger.info("增加成功！");
    } else {
        logger.error("增加失败！");
    }
}
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1.3、控制台输出结果：
org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0
dataSource
sqlSessionFactory
org.mybatis.spring.mapper.MapperScannerConfigurer#0
userService
org.springframework.context.annotation.internalConfigurationAnnotationProcessor
org.springframework.context.annotation.internalAutowiredAnnotationProcessor
org.springframework.context.annotation.internalRequiredAnnotationProcessor
org.springframework.context.annotation.internalCommonAnnotationProcessor
org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor
userMapper
- (715 ms) - 2019-9-29 16:55:12[DEBUG](AbstractBeanFactory.java:243) Returning cached instance of singleton bean 'userService'
- (749 ms) - 2019-9-29 16:55:12[DEBUG](DataSourceUtils.java:110) Fetching JDBC Connection from DataSource
- (765 ms) - 2019-9-29 16:55:12[DEBUG](DataSourceUtils.java:327) Returning JDBC Connection to DataSource
- (766 ms) - 2019-9-29 16:55:12[ INFO](SpringTest.java:81) 增加成功！
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2、使用Jndi方式配置数据源。
2.1、改造配置文件applicationContext.xml：

<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
	<property name="jndiName">
		<value>java:comp/env/jdbc/javavalue>		
	property>	
bean>
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2.2、注释配置文件applicationContext.xml中的数据源：

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
	
	<property name="driverClassName" value="${driver}">property>
	<property name="url" value="${url}">property>
	<property name="username" value="${user}">property>
	<property name="password" value="${password}">property>
bean>
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2.3、找到安装Tomcat的文件夹，在conf目录下打开context.xml配置文件，添加如下代码：
<Resource name="jdbc/java" 
type="javax.sql.DataSource"
auth="Container"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql:///p19_java7_mybatis"
username="root"
password="aaa"
maxActive="100"
maxIdle="50"
maxWait="1000"
/>
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2.4、在包com.javaxyz.servlet下，创建UserServlet.java文件
/**
 * @Author：DongGaoYun
 * @Description:
 * @Date 2019-10-9　下午5:11:10
 * @Version 1.0
 * @Company: www.springhome.org
 */
package com.javaxyz.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.javaxyz.entity.User;
import com.javaxyz.service.UserService;
import com.javaxyz.test.SpringTest;

/**
 * @ClassName：UserServlet.java
 * @Description：描述信息
 * @Author：DongGaoYun
 * @Author English name：Andy 
 * @URL：www.javaxyz.com 或 www.gyun.org
 * @Email：[email protected]
 * @QQ：1050968899
 * @WeiXin：QingYunJiao
 * @WeiXinGongZhongHao: JavaForum
 * @Date：2019-10-9 下午5:11:10
 * @Version：1.0
 */
public class UserServlet extends HttpServlet {
	private static Logger logger = Logger.getLogger(UserServlet.class);

	/**
	 * The doGet method of the servlet. 

	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. 

	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		/*
		 * add用户信息 UserService调用 配置声明式事务
		 */
		ApplicationContext context = new ClassPathXmlApplicationContext(
				"applicationContext.xml");
		// 原来是通过映射接口去调用
		// UserMapper userMapper = (UserMapper) context.getBean("userMapper");
		//获取所有JavaBean的名称
		String[] bean = context.getBeanDefinitionNames();
		for (String string : bean) {
			System.out.println(string);
		}
		// 现在是通过业务接口去调用
		UserService service = (UserService) context.getBean("userService");
		User user = new User();
		user.setUserCode("zhangxiulian");
		user.setUserName("张秀连666");
		user.setUserPassword("123999");
		user.setGender(0);
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		try {
			user.setBirthday(sdf.parse("2010-9-17"));
		} catch (ParseException e) {
			e.printStackTrace();
		}
		user.setPhone("13608880888");
		user.setAddress("养育巷49");
		user.setUserRole(2);
		user.setCreatedBy(1);
		user.setCreationDate(new Date());
		Integer userRole = 2;
		// int num = userMapper.addUser(user);
		List<User> listUsers = new ArrayList<User>();
		listUsers.add(user);
		listUsers.add(user);
		int num = service.saveUser(listUsers);
		if (num > 0) {
			logger.info("增加成功！");
		} else {
			logger.error("增加失败！");
		}
	}
}
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注意：使用jndi数据源，显示结果需要启动Tomcat服务器，执行web路径:　http://localhost:9999/java7_chapter7_spring2_jndi/userServlet

2.5、控制台输出结果：
- (1061 ms) - 2019-10-9 17:15:13[DEBUG](PropertySourcesPropertyResolver.java:103) Could not find key 'spring.liveBeansView.mbeanDomain' in any property source. Returning [null]
org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0
dataSource
sqlSessionFactory
org.mybatis.spring.mapper.MapperScannerConfigurer#0
userService
org.springframework.context.annotation.internalConfigurationAnnotationProcessor
org.springframework.context.annotation.internalAutowiredAnnotationProcessor
org.springframework.context.annotation.internalRequiredAnnotationProcessor
org.springframework.context.annotation.internalCommonAnnotationProcessor
transactionManager
org.springframework.aop.config.internalAutoProxyCreator
org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0
org.springframework.transaction.interceptor.TransactionInterceptor#0
org.springframework.transaction.config.internalTransactionAdvisor
org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor
userMapper
- (1061 ms) - 2019-10-9 17:15:13[DEBUG](AbstractBeanFactory.java:243) Returning cached instance of singleton bean 'userService'
- (1063 ms) - 2019-10-9 17:15:13[DEBUG](AbstractBeanFactory.java:243) Returning cached instance of singleton bean 'org.springframework.transaction.interceptor.TransactionInterceptor#0'
- (1066 ms) - 2019-10-9 17:15:13[DEBUG](AbstractFallbackTransactionAttributeSource.java:107) Adding transactional method 'UserServiceImpl.saveUser' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
- (1069 ms) - 2019-10-9 17:15:13[DEBUG](AbstractBeanFactory.java:243) Returning cached instance of singleton bean 'transactionManager'
- (1076 ms) - 2019-10-9 17:15:13[DEBUG](AbstractPlatformTransactionManager.java:366) Creating new transaction with name [com.javaxyz.service.impl.UserServiceImpl.saveUser]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
- (1078 ms) - 2019-10-9 17:15:13[DEBUG](DataSourceTransactionManager.java:204) Acquired Connection [jdbc:mysql:///p19_java7_mybatis, UserName=root@localhost, MySQL-AB JDBC Driver] for JDBC transaction
- (1087 ms) - 2019-10-9 17:15:13[DEBUG](DataSourceTransactionManager.java:221) Switching JDBC Connection [jdbc:mysql:///p19_java7_mybatis, UserName=root@localhost, MySQL-AB JDBC Driver] to manual commit
- (1093 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) Creating a new SqlSession
- (1099 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) Registering transaction synchronization for SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1cd1130a]
- (1138 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) JDBC Connection [jdbc:mysql:///p19_java7_mybatis, UserName=root@localhost, MySQL-AB JDBC Driver] will be managed by Spring
- (1141 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) ooo Using Connection [jdbc:mysql:///p19_java7_mybatis, UserName=root@localhost, MySQL-AB JDBC Driver]
- (1146 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) ==>  Preparing: INSERT INTO smbms_user (userCode, userName, userPassword, gender, birthday, phone, address, userRole, createdBy, creationDate) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?); 
- (1172 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) ==> Parameters: zhangxiulian(String), 张秀连666(String), 123999(String), 0(Integer), 2010-09-17 00:00:00.0(Timestamp), 13608880888(String), 养育巷49(String), 2(Integer), 1(Integer), 2019-10-09 17:15:13.769(Timestamp)
- (1175 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1cd1130a]
- (1176 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) Fetched SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1cd1130a] from current transaction
- (1177 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) ooo Using Connection [jdbc:mysql:///p19_java7_mybatis, UserName=root@localhost, MySQL-AB JDBC Driver]
- (1178 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) ==>  Preparing: INSERT INTO smbms_user (userCode, userName, userPassword, gender, birthday, phone, address, userRole, createdBy, creationDate) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?); 
- (1178 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) ==> Parameters: zhangxiulian(String), 张秀连666(String), 123999(String), 0(Integer), 2010-09-17 00:00:00.0(Timestamp), 13608880888(String), 养育巷49(String), 2(Integer), 1(Integer), 2019-10-09 17:15:13.769(Timestamp)
- (1180 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1cd1130a]
- (1180 ms) - 2019-10-9 17:15:13[DEBUG](AbstractPlatformTransactionManager.java:753) Initiating transaction commit
- (1181 ms) - 2019-10-9 17:15:13[DEBUG](DataSourceTransactionManager.java:267) Committing JDBC transaction on Connection [jdbc:mysql:///p19_java7_mybatis, UserName=root@localhost, MySQL-AB JDBC Driver]
- (1188 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) Transaction synchronization committing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1cd1130a]
- (1188 ms) - 2019-10-9 17:15:13[DEBUG](JakartaCommonsLoggingImpl.java:46) Transaction synchronization closing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1cd1130a]
- (1191 ms) - 2019-10-9 17:15:13[DEBUG](DataSourceTransactionManager.java:325) Releasing JDBC Connection [jdbc:mysql:///p19_java7_mybatis, UserName=root@localhost, MySQL-AB JDBC Driver] after transaction
- (1191 ms) - 2019-10-9 17:15:13[DEBUG](DataSourceUtils.java:327) Returning JDBC Connection to DataSource
- (1192 ms) - 2019-10-9 17:15:13[ INFO](UserServlet.java:126) 增加成功！
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3、bug场景：引入database.properties配置文件时报错：
  • 报错详情：
- (369 ms) - 2019-10-9 16:34:56[ WARN](AbstractApplicationContext.java:486) Exception encountered during context initialization - cancelling refresh attempt
org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'dataSource' defined in class path resource [applicationContext.xml]: Could not resolve placeholder 'users' in string value "${users}"; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'users' in string value "${users}"
	at org.springframework.beans.factory.config.PlaceholderConfigurerSupport.doProcessProperties(PlaceholderConfigurerSupport.java:209)
	at org.springframework.beans.factory.config.PropertyPlaceholderConfigurer.processProperties(PropertyPlaceholderConfigurer.java:223)
	at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:84)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:696)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:671)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
	at com.javaxyz.test.SpringTest.test9(SpringTest.java:48)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'users' in string value "${users}"
	at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:173)
	at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:125)
	at org.springframework.beans.factory.config.PropertyPlaceholderConfigurer$PlaceholderResolvingStringValueResolver.resolveStringValue(PropertyPlaceholderConfigurer.java:258)
	at org.springframework.beans.factory.config.BeanDefinitionVisitor.resolveStringValue(BeanDefinitionVisitor.java:282)
	at org.springframework.beans.factory.config.BeanDefinitionVisitor.resolveValue(BeanDefinitionVisitor.java:204)
	at org.springframework.beans.factory.config.BeanDefinitionVisitor.visitPropertyValues(BeanDefinitionVisitor.java:141)
	at org.springframework.beans.factory.config.BeanDefinitionVisitor.visitBeanDefinition(BeanDefinitionVisitor.java:82)
	at org.springframework.beans.factory.config.PlaceholderConfigurerSupport.doProcessProperties(PlaceholderConfigurerSupport.java:206)
	... 31 more
- (371 ms) - 2019-10-9 16:34:56[ INFO](DefaultSingletonBeanRegistry.java:444) Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@6a109ac: defining beans [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource,sqlSessionFactory,org.mybatis.spring.mapper.MapperScannerConfigurer#0,userService,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor,userMapper]; root of factory hierarchy
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  • 重点：
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'users' in string value "${users}"
意思是：无法解析字符串值“${users}”中的占位符“users”
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  • 报错位置：
		<property name="username" value="${users}">property>
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  • 报错原因是配置文件database.properties里用户名的key是user,而不是users
　　　　user=root
  • 1
  • 正确的配置方式：
		<property name="username" value="${user}">property>
  • 1

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