mybatisplus查询，只返回list中指定的字段

LambdaQueryWrapper<ProjectBean> queryWrapper = new LambdaQueryWrapper<>();
queryWrapper.ne(ProjectBean::getProjectId, projectId);
queryWrapper.eq(ProjectBean::getProjectOrgId, orgId);

List<String> fieldList = new ArrayList<>();
fieldList.add("PROJECT_NAME");    

queryWrapper.select(ProjectBean.class,i -> fieldList.contains(i.getColumn()));

List<ProjectBean> projectBeanList = projectMapper.selectList(queryWrapper);

log.info("projectBeanList = {}",JSON.toJSONString(projectBeanList));

[
    {
        "projectId": "1004",
        "projectName": "aaaa"
    },
    {
        "projectId": "10166",
        "projectName": "bbbb"
    },
    {
        "projectId": "10170",
        "projectName": "cccc"
    }
]
 

结论：

1、主键应该不需要指定，默认返回

2、指定列时，使用的是数据库的字段名称，而非属性名称，例如PROJECT_NAME