一个简单的mybatis入门demo

创一个简单的maven项目

第一步:maven配置

mysql
mysql-connector-java
5.1.35


org.mybatis
mybatis
3.3.0

第二步:实体和DAO接口

实体类

public class FundBase {
/**
* 基金代码
*/
private int code;
/**
* 基金名称
*/
private String name;
/**
* 成立日期
*/
private Date foundedTime;
/**
* 记录保存时间
*/
private Date saveTime;


public int getCode() {
return code;
}


public void setCode(int code) {
this.code = code;
}


public String getName() {
return name;
}


public void setName(String name) {
this.name = name;
}


public Date getFoundedTime() {
return foundedTime;
}


public void setFoundedTime(Date foundedTime) {
this.foundedTime = foundedTime;
}


public Date getSaveTime() {
return saveTime;
}


public void setSaveTime(Date saveTime) {
this.saveTime = saveTime;
}


}

DAO接口

public interface FundBaseDao {
public List queryAllFundBase();
public FundBase queryFundBaseByCode();
}

第三部：配置文件

mybatis.xml

 
    "-//mybatis.org//DTD Config 3.0//EN"  
    "http://mybatis.org/dtd/mybatis-3-config.dtd">










value="jdbc:mysql://192.168.1.200:3306/fund?characterEncoding=utf-8" />










 

FundBaseDao.xml

 


 
                select * from FundBase 
        ]]>

 

第四部：测试

public static void main(String[] args) {
String resource = "mybatis.xml";
Reader reader = null;
try {
reader = Resources.getResourceAsReader(resource);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder()
.build(reader);
SqlSession session = sessionFactory.openSession();
FundBaseDao userDao = session.getMapper(FundBaseDao.class);
List users = userDao.queryAllFundBase();
for (FundBase fund : users) {
System.out.println(fund.getCode() + ":" + fund.getName());
}
}