Spring簡單與數據庫鏈接

一、導入須要的jar包

二、配置數據源，在applicationContext.xml文件中增長配置

方式1：直接使用bean方式

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< bean id = "dataSource" class = "org.apache.commons.dbcp.BasicDataSource" destroy-method = "close" >      < property name = "driverClassName" value = "com.mysql.jdbc.Driver" />      < property name = "url" value = "jdbc:mysql://localhost:3306/test" />      < property name = "username" value = "root" />      < property name = "password" value = "root" /> </ bean >

方式2：使用properties文件

在src下新建jdbc.properties文件，內容以下：

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jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql: //localhost:3306/test jdbc.username=root jdbc.password=root

applicationContext.xml

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< bean      class = "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >      < property name = "locations" value = "classpath:jdbc.properties" /> </ bean > < bean id = "dataSource" destroy-method = "close"      class = "org.apache.commons.dbcp.BasicDataSource" >      < property name = "driverClassName" value = "${jdbc.driverClassName}" />      < property name = "url" value = "${jdbc.url}" />      < property name = "username" value = "${jdbc.username}" />      < property name = "password" value = "${jdbc.password}" /> </ bean >

三、測試鏈接數據庫

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package com.fz.annotation.dao.impl;   import java.sql.Connection; import java.sql.SQLException;   import javax.annotation.Resource; import javax.sql.DataSource;   import org.springframework.stereotype.Repository;   import com.fz.annotation.dao.UserDao; import com.fz.xml.entity.User;   @Repository ( "userDao" ) public class UserDaoImpl implements UserDao{      private DataSource dataSource;      public void userAdd(User user) {          Connection conn = null ;          try {              conn = dataSource.getConnection();              conn.createStatement().executeUpdate( "insert into user values(null,'張三')" );          } catch (Exception e) {              e.printStackTrace();          } finally {              try {                  conn.close();              } catch (SQLException e) {                  e.printStackTrace();              }          }      }            public DataSource getDataSource() {          return dataSource;      }      @Resource      public void setDataSource(DataSource dataSource) {          this .dataSource = dataSource;      }   }

來自爲知筆記(Wiz)