druid链接数据库

所用jar包

commons-beanutils-1.8.0.jar
commons-logging-1.1.3.jar
druid-1.0.9.jar
mysql-connector-java-5.1.18-bin.jar
spring-beans-3.2.5.RELEASE.jar
spring-context-3.2.5.RELEASE.jar
spring-core-3.2.5.RELEASE.jar
spring-expression-3.2.5.RELEASE.jar
spring-jdbc-3.2.5.RELEASE.jar
spring-tx-3.2.5.RELEASE.jar

连接mysql的配置文件
# druid.properties文件的配置
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/db1
username=
password=
# 初始化连接数量
initialSize=5
# 最大连接数
maxActive=10
# 最大超时时间
maxWait=3000

连接数据库的工具

import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

public class JDBCUtil {
//定义数据源
    private static DataSource ds;
    static{

        try {
            //定义Properties对象
            Properties pro=new Properties();
            //获取druid的地址，使用字节码获得
            InputStream is = JDBCUtil.class.getClassLoader().getResourceAsStream("druid.properties");
            pro.load(is);
            ds = DruidDataSourceFactory.createDataSource(pro);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
    public static  DataSource getDataSource(){
        return ds;
    }
    public static Connection getConnection() throws SQLException {
        return ds.getConnection();
    }
}

操作数据库增删改查的方法

public class UserDaoImp implements UserDao{

//声明JDBCTemplate
private JdbcTemplate template=new JdbcTemplate(JDBCUtil.getDataSource());

//判断用户登录时的用户名和密码等

@Override
public User userLogin(User user) {
    User user1 = null;
    try {
        String sql = "select * from user where username=? and password=?";
        user1 = template.queryForObject(sql,
                new BeanPropertyRowMapper<User>(User.class),
                user.getUsername(),
                user.getPassword());
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
    return user1;
}

//查询表中所有数据

@Override
public List<User> users() {
    String sql="select * from user";
    List<User> maps = template.query(sql, new BeanPropertyRowMapper<User>(User.class));
    return maps;
}

//删除数据

@Override
public void delUser(int id) {
    String sql="delete from user where id=?";
    template.update(sql,id);
}
//添加数据

public void addUser(User user) {
    String sql="insert into user(username,password,name,deptid,orgid,createdate) values('nc123456','nc123456',?,?,?,?)";
    template.update(sql,user.getName(),user.getDeptid(),user.getOrgid(),new Date());
}

//修改数据

@Override
public void updateUser(User user) {
    String sql="update user set deptid=?,orgid=? where id=?";
    template.update(sql,user.getDeptid(),user.getOrgid(),user.getId());
}

}

JSP

<table class="table table-hover table-condensed table-bordered" align="center">

    <tr style="background-color: #b2dba1;text: center" >
        <th><label class="checkbox-inline">
            <input type="checkbox" name="uid" id="firstcb">
        </label></th>
        <th>序号</th>
        <th>姓名</th>
        <th>组织序号</th>
        <th>部门序号</th>
        <th>日期</th>
        <th>操作</th>
    </tr>
    <c:forEach items="${users}" varStatus="list" var="lis">
        <tr>
            <td><label class="checkbox-inline">
                <input type="checkbox" name="uid" value="${lis.id}">
            </label></td>
            <td>${list.count}</td>
            <td>${lis.name}</td>
            <td>${lis.orgid}</td>
            <td>${lis.deptid}</td>
            <td>${lis.createdate}</td>
            <td><a class="btn btn-default" href="javascript:update(${lis.id});" role="button">修改</a>
                <a class="btn btn-default" href="javascript:delecte(${lis.id});" role="button">删除</a></td>
        </tr>
    </c:forEach>
</table>