Spring_JDBC连接

1.导入jarbao

2.创建pojo,dao,Impl

package com.tanlei.pojo;

public class Department {
    private Long deptId;
    private String deptNo;
    private String deptName;

    public Department() {
        super();
    }

    public Department(Long deptId, String deptNo, String deptName) {
        super();
        this.deptId = deptId;
        this.deptNo = deptNo;
        this.deptName = deptName;
    }

    public Long getDeptId() {
        return deptId;
    }
    public void setDeptId(Long deptId) {
        this.deptId = deptId;
    }
    public String getDeptNo() {
        return deptNo;
    }
    public void setDeptNo(String deptNo) {
        this.deptNo = deptNo;
    }
    public String getDeptName() {
        return deptName;
    }
    public void setDeptName(String deptName) {
        this.deptName = deptName;
    }

    @Override
    public String toString() {
        return "Department [deptId=" + deptId + ", deptNo=" + deptNo + ", deptName=" + deptName + "]";
    }

}

package com.tanlei.service;

import java.util.List;

import com.tanlei.pojo.Department;

public interface DepartmentDao {
    public List<Department> queryDepartment() throws Exception;
}

package com.tanlei.service.impl;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import javax.sql.DataSource;

import com.tanlei.pojo.Department;
import com.tanlei.service.DepartmentDao;

public class DepartmentDaoImpl implements DepartmentDao {
    public  DataSource datasource;

    public void setDatasource(DataSource datasource) {
        this.datasource = datasource;
    }

    @Override
    public List<Department> queryDepartment() throws Exception {

        //从数据源获取连接
        Connection connection=datasource.getConnection();
        //执行数据库操作
        Statement statement=connection.createStatement();
        //根据sql语句返回结果集
        String sql="Select d.dept_id, d.dept_no, d.dept_name from department d";
        ResultSet rSet=statement.executeQuery(sql);
        List<Department>list =new ArrayList<Department>();
        while(rSet.next()) {
             Long deptId=rSet.getLong("dept_id");
             String deptNo=rSet.getString("dept_no");
             String deptName=rSet.getString("dept_name");
             Department department=new Department(deptId, deptNo, deptName);
             list.add(department);
        }
        return list;
    }

}

3.创建配置文件及bean文件及数据源文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    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.xsd">

 <bean id="departmentDAO" class="com.tanlei.service.impl.DepartmentDaoImpl">
     <property name="datasource" ref="dataSource"></property>
 </bean>

</beans>

<?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"
    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-4.0.xsd">
     <!-- 导入属性文件  -->
  <context:property-placeholder location="classpath:jdbc.properties"/>

  <!-- Spring配置数据源 -->
 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="user" value="${user}"></property>
    <property name="password"  value="${password}"></property>
    <property name="driverClass" value="${driverClass}"></property>
    <property name="jdbcUrl" value="${jdbcUrl}"></property>
 </bean>
</beans>

#mysql
user=root
password=password
driverClass=com.mysql.jdbc.Driver
jdbcUrl=jdbc:mysql://localhost:3306/mysql?serverTimezone=GMT%2B8
#oracle
#user=scott
#password=tiger
#driverClass=oracle.jdbc.OracleDriver
#jdbcUrl=jdbc:oracle:thin:@localhost:1521:ORCL

4.配置主配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    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.xsd">

    <!--调用数据源集bean的配置文件xml -->
    <import resource="dao/spring-department.xml" />
    <!-- mysql -->
     <import resource="database/spring-database-mysql.xml"/>
    <!-- oracle -->
    <!-- <import resource="oracledatabase/spring-databse-oracle.xml" /> -->
</beans>

5.创建运行类

package com.tanlei.dao;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.tanlei.pojo.Department;
import com.tanlei.service.DepartmentDao;

public class MainDao {

    public static void main(String[] args) throws Exception {
        ApplicationContext context=new ClassPathXmlApplicationContext("spring-module.xml");
        DepartmentDao departmentDao=(DepartmentDao) context.getBean("departmentDAO");
        List<Department> departments=departmentDao.queryDepartment();
        for (Department department : departments) {
            System.out.println(department.toString());
            System.out.println(department.getDeptId());
        }
    }

}

6.运行结果