【Spring】applicationContext.xml

Spring配置

新建项目

目录 applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 引入db.properties --> <context:property-placeholder location="classpath:jdbc.properties" /> <!-- 配置C3P0数据源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="jdbcUrl" value="${jdbc.url}"></property> <property name="driverClass" value="${jdbc.driver}"></property> <property name="user" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> </bean> <!-- 配置 Spring 的 jdbcTemplate --> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置DAO的类 --> <bean id="accountDao" class="cn.mooc.trans.AccountDaoImpl"></bean> <!-- 配置业务层类 --> <bean id="accountService" class="cn.mooc.trans.AccountServiceImpl"></bean> </beans>

完成过程中遇到的问题

1.Could not load driverClass "com.mysql.jdbc.Driver

缺少jar mysql-connector-java包

2.Caused by: org.xml.sax.SAXParseException; lineNumber: 11; columnNumber: 75; cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'context:property-placeholder'

确定引入文件头 xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation缺少相关解析文件 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd

3.Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing

导入的Junit.jar包版本太高的时候，需要同时导入hamcrest-core-1.3.jar