Spring 连接数据库测试

1.编写测试对象类

package model;

import java.io.Serializable;

/**
 * Created by xumao on 2016/12/5.
 */
public class User implements Serializable{
    private int id;
    private String name;
    private String password;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public User(int id, String name, String password) {
        super();
        this.id = id;
        this.name = name;
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", password=" + password + "]";
    }
    public User() {
        super();
    }

}

2.加入数据库配置db.properties

#数据库配置
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/xumao?useUnicode=true&characterEncoding=utf8
user=root
password=xumao

3.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"
       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.xsd">
    <context:component-scan base-package="model,test"></context:component-scan>

    <!-- 配置外部资源 -->
    <context:property-placeholder location="classpath:db.properties"/>
    <!-- <util:properties id="dbProperties" location="classpath:db.properties"></util:properties> -->

    <!-- 配置dbcp连接池  -->
    <!-- <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSourceFactory"
           factory-method="createDataSource">
           <constructor-arg ref="dbProperties"/>
    </bean> -->

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
        <property name="jdbcUrl" value="${url}"></property>
        <property name="password" value="${password}"></property>
        <property name="user" value="${user}"></property>
        <property name="driverClass" value="${driver}"></property>
    </bean>

    <!-- 配置jdbcTamplate -->
    <bean id="jdbcTamplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

</beans>

4.测试类

package test;

import model.User;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

import javax.sql.DataSource;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by xumao on 2016/12/5.
 */
public class TestUser {
    ClassPathXmlApplicationContext cx;
    JdbcTemplate jdbcTemplate;
    {
        cx=new ClassPathXmlApplicationContext("springJdbcBean.xml");
//加载配置;
        jdbcTemplate=cx.getBean(JdbcTemplate.class);
    }
    //测试jdbc连接;
    @Test
    public void testDataSource(){
//引入配置文件中的dataSource,与数据库连接;
        DataSource dataSource=(DataSource) cx.getBean("dataSource");
        System.out.println(dataSource);
    }
    //测试jdbcTemplate优化数据库;
    @Test
    public void jdbcTemplate(){
        System.out.println(jdbcTemplate);
    }
    //测试用户的增加;
    @Test
    public void userAdd(){
        String sql="insert into user values(?,?,?)";
        try {
            jdbcTemplate.update(sql,8,"测试2","123456");
            System.out.println("用户添加成功");
        } catch (Exception e) {
            System.out.println("用户添加失败");
        }
    }
    //测试用户的删除;
    @Test
    public void userDel(){
        String sql="delete from user where id=?";
        try {
            jdbcTemplate.update(sql,5);
            System.out.println("用户删除成功");
        } catch (Exception e) {
            System.out.println("用户删除失败");
        }
    }
    //测试用户的修改;
    @Test
    public void userUpd(){
        String sql="update user set name=? where id=?";
        try {
            jdbcTemplate.update(sql,"关羽",7);
            System.out.println("用户修改成功");
        } catch (Exception e) {
            System.out.println("用户修改失败");
        }
    }
    //测试用户的查询,根据用户的id;
    @Test
    public void userSelById(){
        String sql="select * from user where id=?";
        try {
//RowMapper<User> rowMapper=new BeanPropertyRowMapper<User>(User.class);
            User u=jdbcTemplate.queryForObject(sql, new RowMapper<User>() {

                @Override
                public User mapRow(ResultSet rs, int arg1) throws SQLException {
                    User u=new User();
                    u.setId(rs.getInt("id"));
                    String result=null;
                    if(rs.getString("name")!=null){
                        try{
                            result = new String(rs.getString("name").getBytes(),"utf-8");
                        }catch(Exception e){
                            result = null;
                        }
                    }
                    u.setName(result);
                    u.setPassword(rs.getString("password"));
                    return u;
                }
            },8);
            System.out.println(u);
            System.out.println("用户查询成功");
        } catch (Exception e) {
            System.out.println("用户查询失败");
            System.out.println(e.getMessage());
        }
    }
//    @Test
//    public void userSelsById(){
//        String sql="select * from user where id=?";
//        try {
////RowMapper<User> rowMapper=new BeanPropertyRowMapper<User>(User.class);
//           List<User> u=jdbcTemplate.query(sql);
////  {
////
////                @Override
////                public User mapRow(ResultSet rs, int arg1) throws SQLException {
////                    User u=new User();
////                    u.setId(rs.getInt("id"));
////                    u.setName(rs.getString("name"));
////                    u.setPassword(rs.getString("password"));
////                    return u;
////                }
////            },2);
//            System.out.println(u);
//            System.out.println("用户查询成功");
//        } catch (Exception e) {
//            System.out.println("用户查询失败");
//            System.out.println(e.getMessage());
//        }
   // }
    //测试用户的批量添加;
    @Test
    public void userManyAdd(){
        String sql="insert into user values(?,?,?)";
//添加列表;
        List<Object[]> userAdd=new ArrayList<Object[]>();
        userAdd.add(new Object[]{1,"小明","123456"});
        userAdd.add(new Object[]{2,"张飞","123456"});
        userAdd.add(new Object[]{3,"刘备","123456"});
        try {
            jdbcTemplate.batchUpdate(sql, userAdd);
            System.out.println("批量用户添加成功");
        } catch (Exception e) {
            System.out.println("批量用户添加失败");
        }
    }
    //查询用户id大于7的用户的信息;
    @Test
    public void userQuery(){
        String sql="select * from user where id>?";
        //调用jdbcTemplate的方法，重写mapRow的方法;
        try {
            List<User> users=jdbcTemplate.query(sql, new RowMapper() {
                @Override
                public Object mapRow(ResultSet rs, int arg1) throws SQLException {
                    User u=new User();
                    u.setId(rs.getInt("id"));
                    u.setName(rs.getString("name"));
                    u.setPassword(rs.getString("password"));
                    return u;
                }
            },7);
            System.out.println(users);
            System.out.println("用户查询成功");
        } catch (Exception e) {
            System.out.println("用户查询失败");
            System.out.println(e.getMessage());
        }
    }
}

问题总结：

1.缺少包 ：之前使用的是一个集成的spring的包，但是其中还是少了一些jar包，加c3p0的包；

2.数据库乱码问题，这个问题现在还没很好的解决啊，数据库是用命令行的，程序端插入的中文在命令行窗口还是乱码的，取出的数据是正常的。现在IDEA的编码格式是utf-8，数据库设置了utf-8但是没有生效，再次启动还是会变，

mysql> show variables like '%char%';
+--------------------------+---------------------------------------------------------+
| Variable_name | Value |
+--------------------------+---------------------------------------------------------+
| character_set_client | latin1 |
| character_set_connection | latin1 |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | latin1 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | C:\Program Files\MySQL\MySQL Server 5.1\share\charsets\ |
+--------------------------+---------------------------------------------------------+
8 rows in set (0.00 sec)