Spring +MyBatis 整合訪問資料庫出現錯誤
阿新 • • 發佈：2019-01-01
log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. Exception in thread "main"org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dbcppool' defined in class path resource [spring_mybatis.xml]: Error setting property values; nested exception isorg.springframework.beans.NotWritablePropertyException: Invalid property 'uname' of bean class [org.apache.commons.dbcp.BasicDataSource]: Bean property 'uname' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
這裡是檔案叫 spring_mybatis.xml檔案，是整合過程中的訪問資料以及註冊sqlSessionFactory,註冊事務等
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> <bean id="peopertyPlcaceHolder" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:db_mysql.properties"/> </bean> <!-- 註冊連線池 配置引數 --> <bean id="dbcppool" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driver}"/> <property name="url" value="${url}"/> <property name="username" value="${username}"/> <property name="password" value="${passw}"/> <!-- 伸縮性配置 --> <property name="initialSize" value="${initialSize}"/> <property name="maxActive" value="${maxActive}"/> <property name="maxIdle" value="${maxIdle}"/> <property name="minIdle" value="${minIdle}"/> <property name="maxWait" value="${maxWait}"/> </bean> <!-- sqlSessionFactory物件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dbcppool"/> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!-- 註冊一個建立Mapper物件的bean類 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="dao"/> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> </bean> <!-- 配置事務管理 --> </beans>
driver=com.mysql.jdbc.Driver
url=jdbc\:mysql\://localhost\:3306/jsd1790
username=root
upass=qwe
#dbcp pool parameters
initialSize=2
maxActive=20
maxIdle=10
minIdle=2
maxWait=15000
通過多次試驗
Dbcp 的方法中 dataSource的屬性是固定的
通過測試 在我們使用dbcp產品的時候應該設定和人家已經設定好的引數一致
import java.sql.Connection;
import java.sql.SQLException;
import org.apache.commons.dbcp.BasicDataSource;
public class DBCP_demo {
public static void main(String[] args) throws SQLException {
/*
* 實現DBCP資料庫連線池
*/
//1.建立資料庫連線池物件(緩衝區物件)
BasicDataSource dataSource = new BasicDataSource();
//2.設定JDBC的四大引數
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/class90");
dataSource.setUsername("root");
dataSource.setPassword("111");
//3.設定池引數(可選,資料庫連線池物件都有預設引數值)
dataSource.setInitialSize(10);//連線池的初始化連線物件10個
dataSource.setMaxActive(10);//最大並打訪問數10個
dataSource.setMaxIdle(5);//最大空閒數5個
dataSource.setMinIdle(2);//最小空閒數2個
dataSource.setMaxWait(300);//最大等待時間300毫秒
//4.從連線池中獲取連線物件
Connection con = dataSource.getConnection();
/*
* 5.使用連線物件完成jdbc操作:
* jdbc:mysql://localhost:3306/class90, <!--修改 這裡dbcppool的四大引數的名字應該是固定的 name=”” 無論你的.properties檔案裡面的引數名是什麼樣都沒關係，只和你的dbcp的四大引數有關-->
driverClassName
Url
Username
password
<bean id="dbcppool" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${passw}"/>