hibernate的理解

emm~这里就是记录一下，hibernate的save，如果存在id，就可以直接save，就会覆盖原有的，如果不存在id就会在数据库创建一条新的记录

package edu.zut.cs.zutnlp.platform.web.toTable;

import edu.zut.cs.zutnlp.platform.base.web.spring.controller.GenericController;
import edu.zut.cs.zutnlp.platform.dao.toTable.domain.Props;
import edu.zut.cs.zutnlp.platform.dao.toTable.domain.TableMessage;
import edu.zut.cs.zutnlp.platform.toTable.PropsManager;
import edu.zut.cs.zutnlp.platform.toTable.TableMessageManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;

@Controller
@RequestMapping("/Pros")
public class PropsController extends GenericController<Props,Long,PropsManager> {
    PropsManager propsManager;

    @Autowired
    public void setPropsManager(PropsManager propsManager) {
        this.propsManager = propsManager;
        this.manager=this.propsManager;
    }
    @Autowired
    TableMessageManager tableMessageManager;

    @RequestMapping(value = "/list")
    @ResponseBody
    public List<Props> list(){
        List<Props> propsList=new ArrayList<Props>();
        propsList=this.propsManager.findAll();
        return propsList;
    }

    @PostMapping(value = "/add",consumes = {"application/json"},produces = {"application/json"})
    @ResponseBody
    public Boolean add(@RequestBody Props props,
            @RequestParam("TableMessageName") String TableMessageName){
        TableMessage tableMessage=this.tableMessageManager.findByTableName(TableMessageName);
        if (tableMessage!=null){
            props.setTableMessage(tableMessage);
            this.propsManager.save(props);
        }else {
            System.out.println(",表为空，不能建立属性在找到之后返回空");
            return false;
        }
        if(this.propsManager.findByPropsName(props.getPrtysName())!=null) {
            return true;
        }
        return false;
    }

    @ResponseBody
    @PostMapping(value = "/delete")
    public boolean delete(@RequestParam("PropsName") String PropsName){
        Long id=this.propsManager.findByPropsName(PropsName).getId();
        if (id==null){
            return false;
        }else {
            this.propsManager.delete(id);
            if((this.propsManager.findByPropsName(PropsName)==null)==true){
                return true;
            }
        }
        return false;
    }

    @ResponseBody
    @PostMapping(value = "/updata",consumes = "application/json")
    public boolean updata(@RequestBody Props props,
                          @RequestParam("PropsName")String PropsName){
        if(this.propsManager.findByPropsName(PropsName)==null)
        {
            return false;
        }else {
            this.propsManager.updata(props);
            return true;
        }
    }
    @ResponseBody
    @PostMapping(value = "/check/{PropsName}")
    public Props findProps(@PathVariable @RequestParam String PropsName){
        if(this.propsManager.findByPropsName(PropsName)!=null){
            return this.propsManager.findByPropsName(PropsName);
        }
        return null;
    }
}