知识点

不分页获取图片

controller

    /**
     * 获取特卫服务类型（所有）
     * @param request
     * @param response
     * @param time_stamp
     * @param sig
     * @param callback
     */
    @RequestMapping("/queryAllTType")
    public void queryAllTType(HttpServletRequest request,HttpServletResponse response,
            @RequestParam("time_stamp") String time_stamp,@RequestParam("sig") String sig,@RequestParam("callback") String callback){
        String localhost = FileUtil.getLocalhost();
        Map<String,Object> map=new HashMap<String,Object>();
        map=ParameterValidation.validateParameter(time_stamp, sig, "queryAllTType");
        if(map.get("code")==null){
            List<SgTaskType> list=sgTaskTypeServiceImpl.findAllType();
            List<SgTaskType> lastlist = new ArrayList<SgTaskType>();
             if(list!=null&&list.size()>0){
                    for(SgTaskType pic : list){
                         pic.setPicture(localhost+request.getContextPath()+"/pc/sg/findSgTaskTypeCoverImg?id="+pic.getId()+".png");
                         lastlist.add(pic);
                    }
                }
            map.put("data", list);
            map.put("code", 200);
        }
        returnEntityToJson(response, callback, map);
    }

/**
     * 获取特卫任务图片
     * @param request
     * @param response
     * @param id
     */
    @RequestMapping("/findSgTaskTypeCoverImg")
    public void findSgTaskTypeCoverImg(HttpServletRequest request,HttpServletResponse response,@RequestParam("id") String id){
        Map<String,Object> map = new HashMap<String,Object>();
        if(id==null||"".equals(id)){    
            map.put("code", 201);//id号为空
            map.put("data", null);
            returnEntityToJson(response,map);
            return;
        }
        String attr[] = id.split(".png");
        SgTaskType Ttype = sgTaskTypeServiceImpl.findEntityById(attr[0]);
        if(Ttype!=null){
            String imgpath = Ttype.getPicture();
            if(imgpath!=null&&!"".equals(imgpath)){
                byte[] s = FileUtil.loadFile(imgpath);
                if(s!=null&&s.length>0){
                    response.reset();
                    try {
                        response.getOutputStream().write(s);
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }else{
                    byte[] s1 = FileUtil.loadFile(FileUtil.getPro("/filePath.properties","defaultCover"));
                    if(s1!=null&&s1.length>0){
                        response.reset();
                        try {
                            response.getOutputStream().write(s1);
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }

service

public List<SgTaskType> findAllType(){
        
        return sgTaskTypeDao.findALLType();
        
    }

dao

@Query("select t from SgTaskType t where 1=1")
    List<SgTaskType> findALLType();
//通过id查
    @Query("from SgTaskType t where t.id=:id")
    List<SgTaskType> findAllTaskTypeById(@Param("id") String id);
    

分页获取图片（获取图片与不分页同，用同一个即可）

controller

    /**
     * 获取特卫服务的类型（贴身保镖，逛街拎包，接送孩子等）----分页
     * @param request
     * @param response
     * @param time_stamp
     * @param sig
     */
    @RequestMapping("/queryALLSgTaskType")
    public void queryALLSgTaskType(HttpServletRequest request,HttpServletResponse response,
            @RequestParam("time_stamp") String time_stamp,@RequestParam("sig") String sig,@RequestParam("callback") String callback,
            @RequestParam("page") int page,@RequestParam("rows") int rows){
        String localhost = FileUtil.getLocalhost();
        Map<String,Object> map=new HashMap<String,Object>();
        map=ParameterValidation.validateParameter(time_stamp, sig, "queryALLSgTaskType");
        if(map.get("code")==null){
            List<SgTaskType> list=sgTaskTypeServiceImpl.findSgTaskTypeForPage((page-1)*rows, rows);
            List<SgTaskType> lastlist = new ArrayList<SgTaskType>();
             if(list!=null&&list.size()>0){
                    for(SgTaskType pic : list){
                         pic.setPicture(localhost+request.getContextPath()+"/pc/sg/findSgTaskTypeCoverImg?id="+pic.getId()+".png");
                         lastlist.add(pic);
                    }
                }
            map.put("data", list);
            map.put("code",200);
        }
        returnEntityToJson(response, callback, map);
    }
    /**
     * 获取特卫任务图片
     * @param request
     * @param response
     * @param id
     */
    @RequestMapping("/findSgTaskTypeCoverImg")
    public void findSgTaskTypeCoverImg(HttpServletRequest request,HttpServletResponse response,@RequestParam("id") String id){
        Map<String,Object> map = new HashMap<String,Object>();
        if(id==null||"".equals(id)){    
            map.put("code", 201);//id号为空
            map.put("data", null);
            returnEntityToJson(response,map);
            return;
        }
        String attr[] = id.split(".png");
        SgTaskType Ttype = sgTaskTypeServiceImpl.findEntityById(attr[0]);
        if(Ttype!=null){
            String imgpath = Ttype.getPicture();
            if(imgpath!=null&&!"".equals(imgpath)){
                byte[] s = FileUtil.loadFile(imgpath);
                if(s!=null&&s.length>0){
                    response.reset();
                    try {
                        response.getOutputStream().write(s);
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }else{
                    byte[] s1 = FileUtil.loadFile(FileUtil.getPro("/filePath.properties","defaultCover"));
                    if(s1!=null&&s1.length>0){
                        response.reset();
                        try {
                            response.getOutputStream().write(s1);
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }

seivice

/**
     * pc查询任务类型（分页）
     * @param page
     * @param rows
     * @return
     */
    public List<SgTaskType> findSgTaskTypeForPage(int page,int rows){
        return spTaskTypeDaoImpl.findTaskTypeForPage(page, rows);
    }
    

dao.impl

@Component
public class SgTaskTypeDaoImpl {

    @PersistenceContext
    EntityManager entityManager;
    
    public List<SgTaskType> findTaskTypeForPage(int page,int rows){
        
        String sql="select * from t_sgtasktype";
        List<SgTaskType> sg=new ArrayList<SgTaskType>();
        sg=entityManager.createNativeQuery(sql,SgTaskType.class).setFirstResult(page).setMaxResults(rows).getResultList();
        if(!sg.isEmpty()){
            return sg;
        }else{
            return null;
        }
        
    }
}