spring jdbc支持demo

public class dept {
private int deptid;
private String deptname;
public int getDeptid() {
    return deptid;
}
public void setDeptid(int deptid) {
    this.deptid = deptid;
}
public String getDeptname() {
    return deptname;
}
public void setDeptname(String deptname) {
    this.deptname = deptname;
}

}

bean.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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    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">
    
<bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property>
<property name="user"  value="root"></property>
<property name="password" value="root"></property>
<property name="initialPoolSize" value="3"></property>
<property name="maxPoolSize" value="10"></property>
<property name="maxStatements" value="100"></property>
<property name="acquireIncrement" value="2"></property>

</bean>
    <bean id="jdbctemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <constructor-arg ref="datasource"> </constructor-arg>
    </bean>
    <bean id="userdao" class="cn.itcast.hjdbc.userdao">
    <property name="jdbctemplate" ref="jdbctemplate"></property>
    </bean>
</beans>   

 <constructor-arg   如果写为  <property name="dataSource" ref="dataSource"></property>  提示找不到datasource

userdao.java

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.jdbc.core.RowMapper;

public class UserDao {
    
    // IOC容器注入
//    private DataSource dataSource;
//    public void setDataSource(DataSource dataSource) {
//        this.dataSource = dataSource;
//    }
    
    private JdbcTemplate jdbcTemplate;
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    
    public void save() {
        String sql = "insert into t_dept(deptName) values('test');";
        jdbcTemplate.update(sql);
    }
    
    public Dept findById(int id) {
        String sql = "select * from t_dept where deptId=?";
        List<Dept> list = jdbcTemplate.query(sql,new MyResult(), id);
        return (list!=null && list.size()>0) ? list.get(0) : null;
    }
    
    public List<Dept> getAll() {
        String sql = "select * from t_dept";
        List<Dept> list = jdbcTemplate.query(sql, new MyResult());
        return list;
    }
    
    
    
    
    class MyResult implements RowMapper<Dept>{

        // 如何封装一行记录
        @Override
        public Dept mapRow(ResultSet rs, int index) throws SQLException {
            Dept dept = new Dept();
            dept.setDeptId(rs.getInt("deptId"));
            dept.setDeptName(rs.getString("deptName"));
            return dept;
        }
        
    }
}

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

public class app {
    ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/hjdbc/bean.xml");
    @Test
    public void testApp() throws Exception {
        userdao ud = (userdao) ac.getBean("userdao");
//        ud.save();
        System.out.println(ud.findbyid(9));
        System.out.println(ud.getAll());
    }
    
}