java Spring Boot中用什么代替“System.out.println”答案

【问题标题】：What to use instead of "System.out.println" in java Spring Bootjava Spring Boot中用什么代替“System.out.println”
【发布时间】：2020-05-15 19:07:55
【问题描述】：

@RequestMapping(method=RequestMethod.POST, value= {"/LMSServer/getNoOfDaysOfApplicationBycellNo"} )
@PreAuthorize("hasAuthority('CUSTOMER_MANAGEMENT_R') OR hasAuthority('CUSTOMER_MANAGEMENT_RW')")
public BasicResponce getNoOfDaysOfApplicationBycellNo(@RequestParam(value = "cellNo") long cellNo)
{
    if(LOG.isInfoEnabled()){
        LOG.info("WebClientRestContoller.getNoOfDaysOfApplicationBycellNo--Start");
        LOG.info("Cell NO: "+cellNo);
    }

    BasicResponce authResp = null;
    try {

        Customer fromDB= (Customer) objLMSDAO.getDetailsByCellno(cellNo);
        DaysOfApplicationResponseDTO toSend= new DaysOfApplicationResponseDTO();

        toSend.setCreatedAt(fromDB.getCreatedAt()+"");
        toSend.setUpdatedAt(fromDB.getUpdatedAt()+"");

        toSend.setRequested_Action(true);

        authResp=toSend;    


        } catch (Exception e) {
            e.printStackTrace();
        }

        if(LOG.isInfoEnabled()){
            LOG.info("Returned Response is:");
            LOG.info("Response Requested_Action: {} ",new Object[]{authResp.getRequested_Action()});
            LOG.info("WebClientRestContoller.getNoOfDaysOfApplicationBycellNo--End");
        }

        return authResp;

}

以上是我的主要代码。我想打印天数的差异（createdAt 和 updatedAt 之间的天数）。我在哪里写这个逻辑？我记得在java中我们使用System.out.println来显示输出，但是这里我不知道在Postman上显示代码。

下面是我的 DTO：

public class DaysOfApplicationResponseDTO extends BasicResponce{

private String createdAt;
private String updatedAt;
private String days;


public String getDays() {
    return days;
}

public void setDays(String days) {
    this.days = days;
}
private List<CustomerLoanSummaryResponseDTO> LoanApplicationDummyResponseList;

public String getCreatedAt() {
    return createdAt;
}

public void setCreatedAt(String createdAt) {
    this.createdAt = createdAt;
}

public String getUpdatedAt() {
    return updatedAt;
}

public void setUpdatedAt(String updatedAt) {
    this.updatedAt = updatedAt;
}

public List<CustomerLoanSummaryResponseDTO> getLoanApplicationDummyResponseList() {
    return LoanApplicationDummyResponseList;
}

public void setLoanApplicationDummyResponseList(
        List<CustomerLoanSummaryResponseDTO> loanApplicationDummyResponseList) {
    LoanApplicationDummyResponseList = loanApplicationDummyResponseList;
}

public DaysOfApplicationResponseDTO() {
    super();
}
public DaysOfApplicationResponseDTO(String createdAt, String UpdatedAt, String days,
        List<CustomerLoanSummaryResponseDTO> loanApplicationDummyResponseList) {
    super();
    this.createdAt = createdAt;
    this.updatedAt = updatedAt;
    this.days = days;
    this.LoanApplicationDummyResponseList = loanApplicationDummyResponseList;

}
}

【问题讨论】：

您希望输出到哪里？放入日志文件以控制发生的情况，还是在客户端页面上？
请修改标题，因为标题与实际问题无关！

标签： java spring-boot mysql-workbench hibernate-mapping hibernate-criteria

【解决方案1】：

您可以将服务类（@service 注释）引入您的项目以实现域逻辑。您必须将项目分解并组织成合适的项目结构（为了清晰起见，您的控制器、实体、服务位于不同的包中）。最好阅读这些以获取更多信息。

这是一个有用的堆栈溢出问题， What is the recommended project structure for spring boot rest projects?

【讨论】：