new QueryWrapper<Gonggao>().orderByDesc("sendtime")

这段代码是使用 MyBatis-Plus 框架的 QueryWrapper 类来构建查询条件，查询 Gonggao 表中的数据并以 sendtime 字段为降序排列。其中，Gonggao 是表对应的实体类，"sendtime" 是表中的字段名。该查询语句会生成类似于以下 SQL 语句：

SELECT * FROM Gonggao ORDER BY sendtime DESC;

相关问题

翻译代码：package com.action; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import java.util.Map; import org.apache.struts2.ServletActionContext; import com.dao.TGonggaoDAO; import com.model.TAdmin; import com.model.TGonggao; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class gonggaoAction extends ActionSupport { private Integer id; private String biaoti; private String neirong; private String shijian; private String message; private String path; private TGonggaoDAO gonggaoDAO; public String gonggaoAdd() { TGonggao gonggao=new TGonggao(); gonggao.setBiaoti(biaoti); gonggao.setNeirong(neirong); gonggao.setShijian(new SimpleDateFormat("yyyy-MM-dd HH:mm").format(new Date())); gonggaoDAO.save(gonggao); this.setMessage("公告添加完毕"); this.setPath("gonggaoMana.action"); return "succeed"; } public String gonggaoMana() { List gonggaoList =gonggaoDAO.findAll(); Map request=(Map)ServletActionContext.getContext().get("request"); request.put("gonggaoList", gonggaoList); return ActionSupport.SUCCESS; } public String gonggaoDel() { TGonggao gonggao=gonggaoDAO.findById(id); gonggaoDAO.delete(gonggao); this.setMessage("公告删除完毕"); this.setPath("gonggaoMana.action"); return "succeed"; } public String gonggaoDetailHou() { TGonggao gonggao=gonggaoDAO.findById(id); Map request=(Map)ServletActionContext.getContext().get("request"); request.put("gonggao", gonggao); return ActionSupport.SUCCESS; } public String gonggaoAll() { List gonggaoList =gonggaoDAO.findAll(); Map request=(Map)ServletActionContext.getContext().get("request"); request.put("gonggaoList", gonggaoList); return ActionSupport.SUCCESS; } public String gonggaoDetailQian() { TGonggao gonggao=gonggaoDAO.findById(id); Map request=(Map)ServletActionContext.getContext().get("request"); request.put("gonggao", gonggao); return ActionSupport.SUCCESS; } public String getBiaoti() { return biaoti; } public void setBiaoti(String biaoti) { this.biaoti = biaoti; } public TGonggaoDAO getGonggaoDAO() { return gonggaoDAO; } public void setGonggaoDAO(TGonggaoDAO gonggaoDAO) { this.gonggaoDAO = gonggaoDAO; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public String getNeirong() { return neirong; } public void setNeirong(String neirong) { this.neirong = neirong; } public String getPath() { return path; } public void setPath(String path) { this.path = path; } public String getShijian() { return shijian; } public void setShijian(String shijian) { this.shijian = shijian; } }

这是一个 Java 的 Struts2 框架的 Action 类，包含了公告的增删改查等方法。具体代码如下：

package com.action;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;

import org.apache.struts2.ServletActionContext;

import com.dao.TGonggaoDAO;
import com.model.TAdmin;
import com.model.TGonggao;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class gonggaoAction extends ActionSupport {
	private Integer id;
	private String biaoti;
	private String neirong;
	private String shijian;

	private String message;
	private String path;

	private TGonggaoDAO gonggaoDAO;

	public String gonggaoAdd() {
		TGonggao gonggao=new TGonggao();
		gonggao.setBiaoti(biaoti);
		gonggao.setNeirong(neirong);
		gonggao.setShijian(new SimpleDateFormat("yyyy-MM-dd HH:mm").format(new Date()));
		gonggaoDAO.save(gonggao);
		this.setMessage("公告添加完毕");
		this.setPath("gonggaoMana.action");
		return "succeed";
	}

	public String gonggaoMana() {
		List gonggaoList =gonggaoDAO.findAll();
		Map request=(Map)ServletActionContext.getContext().get("request");
		request.put("gonggaoList", gonggaoList);
		return ActionSupport.SUCCESS;
	}

	public String gonggaoDel() {
		TGonggao gonggao=gonggaoDAO.findById(id);
		gonggaoDAO.delete(gonggao);
		this.setMessage("公告删除完毕");
		this.setPath("gonggaoMana.action");
		return "succeed";
	}

	public String gonggaoDetailHou() {
		TGonggao gonggao=gonggaoDAO.findById(id);
		Map request=(Map)ServletActionContext.getContext().get("request");
		request.put("gonggao", gonggao);
		return ActionSupport.SUCCESS;
	}

	public String gonggaoAll() {
		List gonggaoList =gonggaoDAO.findAll();
		Map request=(Map)ServletActionContext.getContext().get("request");
		request.put("gonggaoList", gonggaoList);
		return ActionSupport.SUCCESS;
	}

	public String gonggaoDetailQian() {
		TGonggao gonggao=gonggaoDAO.findById(id);
		Map request=(Map)ServletActionContext.getContext().get("request");
		request.put("gonggao", gonggao);
		return ActionSupport.SUCCESS;
	}

	public String getBiaoti() {
		return biaoti;
	}

	public void setBiaoti(String biaoti) {
		this.biaoti = biaoti;
	}

	public TGonggaoDAO getGonggaoDAO() {
		return gonggaoDAO;
	}

	public void setGonggaoDAO(TGonggaoDAO gonggaoDAO) {
		this.gonggaoDAO = gonggaoDAO;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	public String getNeirong() {
		return neirong;
	}

	public void setNeirong(String neirong) {
		this.neirong = neirong;
	}

	public String getPath() {
		return path;
	}

	public void setPath(String path) {
		this.path = path;
	}

	public String getShijian() {
		return shijian;
	}

	public void setShijian(String shijian) {
		this.shijian = shijian;
	}
}

public Response add(@RequestBody Gonggao gonggao, HttpServletRequest request) throws Exception { try { gonggao.setFbsj(LocalDateTime.now().format(DateTimeFormatter.ofPattern(yyyy-

MM-dd HH:mm:ss))); gonggaoService.addGonggao(gonggao); return Response.success("添加公告成功"); } catch (Exception e) { return Response.error("添加公告失败：" + e.getMessage()); } }

这段代码是一个添加公告的接口，使用了Spring框架，接收一个POST请求，请求体为一个Gonggao对象，其中包含了公告的信息。在方法中，通过设置公告的发布时间为当前时间，然后调用gonggaoService的addGonggao方法来添加公告，最终返回一个Response对象，表示添加结果。如果添加成功，返回一个成功的Response，否则返回一个带有错误信息的Response。