关于数据库查询new BeanPropertyRowMapper

//bean类必须有无参构造,不然new BeanPropertyRowMapper<bean>(bean.class)不会把数据转为bean对象

 @Test
    public void  test3() throws PropertyVetoException {
      //  List<bean> query = jdbcTemplate.query("select * from jiang", new BeanPropertyRowMapper<>(bean.class));
        List<bean> query = jdbcTemplate.query("select * from jiang",new BeanPropertyRowMapper<bean>(bean.class));
        System.out.println(query);
    }

package com.jiang;

public class bean {
    private String username;
    private String password;

    public bean() {
    }

    public bean(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "bean{" +
                "username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}