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);
    }

代码如上

排查半天发现 spring注入时，名称的大小写必须为峰驼式

改成

 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);
    }

成功查询