eclipse使用（一）

　　使用eclipse时，编写对象的返回值非常麻烦，而使用返回值快捷键可以简化这一过程。

• 第一种 Alt+shift+L
  • 将光标放在有返回值的代码句的分号后面；

    Resources.getResourceAsStream("mybatis.xml");
    
    new SqlSessionFactoryBuilder().build(resourceAsStream);
    
    factory.openSession();
    

  • 按住Alt+Shift+L键，会弹出对话框，输入变量的名字，点击OK即可；

InputStream resourceAsStream = Resources.getResourceAsStream("mybatis.xml");

SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(resourceAsStream);

SqlSession session = factory.openSession()；

• 第二种 Ctrl+1
  • 将光标放置在有返回值代码句那一行上（分号前后都行）；

    Resources.getResourceAsStream("mybatis.xml");
    
    new SqlSessionFactoryBuilder().build(resourceAsStream);
    
    factory.openSession();

  • 选择Assign statement to new local variable ： 生成局部变量；

    InputStream resourceAsStream = Resources.getResourceAsStream("mybatis.xml");
    
    SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(resourceAsStream);
    
    SqlSession session = factory.openSession()；

    

  • 选择Assign statement to new field ： 生成全局变量；

    import java.io.IOException;
    import java.io.InputStream;
    import java.util.List;
    
    import org.apache.ibatis.io.Resources;
    import org.apache.ibatis.session.SqlSession;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.apache.ibatis.session.SqlSessionFactoryBuilder;
    
    import com.bjm.pojo.People;
    
    public class Test {
    	private static SqlSessionFactory factory;
    	private static InputStream resourceAsStream;
    	private static SqlSession openSession;
    
    	public static void main(String[] args) throws IOException{
    		resourceAsStream = Resources.getResourceAsStream("mybatis.xml");
    		factory = new SqlSessionFactoryBuilder().build(resourceAsStream);
    		openSession = factory.openSession();
    		List<People> selectList = openSession.selectList("com.bjm.mapper.selAll");
    
    		for (People people : selectList) {
    			System.out.println(people.toString());
    		}openSession.close();
    	}
    }