spring jdbc踩坑日记，new JdbcTemplate 为null导致UserDao一直为null

  private DataSource datasource;
    private JdbcTemplate jdbcTemplateObject;

    //设置注入
    public void setdatasource(DataSource ds) {
        this.datasource = ds;
        System.out.println("xxxxxxxxxxxxxxxxx");
        System.out.println(ds);
        this.jdbcTemplateObject = new JdbcTemplate(datasource);
    }

 private DataSource datasource;
    private JdbcTemplate jdbcTemplateObject;

    //设置注入
    public void setDataSource(DataSource ds) {
        this.datasource = ds;
        System.out.println("xxxxxxxxxxxxxxxxx");
        System.out.println(ds);
        this.jdbcTemplateObject = new JdbcTemplate(datasource);
    }