myabtis封装的mapper

1.全找findAll

@RestController
@RequestMapping("/brand")
public class BrandController {

    @Autowired
    private BrandService brandService; 
 @GetMapping
    public Result findAll(){
        List<Brand> list = brandService.findAll();
        return new Result( true, StatusCode.OK,"查询成功",list );
    }
}



public interface BrandService {

    /**
     * 查询全部数据
     * @return
     */

List<Brand> findAll();
}



@Service
public class BrandServiceImpl implements BrandService {

    @Autowired
    private BrandMapper brandMapper;
@Autowired
private BrandMapper brandMAapper；
public List<Brand> findAll{return brandMapper.selectAll();}


/**
 * 品牌数据访问接口
 */
public interface BrandMapper extends Mapper<Brand> {


}

2.根据id找

 1 @RestController
 2 @RequestMapping("/brand")
 3 public class BrandController {
 4 @GetMapping("/id")
 5 pbublic Result findById( @PathVariable Integer id){
 6         Brand brand = brandService.findById( id );
 7         return new Result( true,StatusCode.OK,"查询成功",brand );
 8     }
 9 }
10 
11 
12 public interface BrandService {
13   Brand findById(Integer id);
14 }
15 
16 @Service
17 public class BrandServiceImpl implements BrandService {
18 
19     @Autowired
20     private BrandMapper brandMapper; @Override
21     public Brand findById(Integer id) {
22         return brandMapper.selectByPrimaryKey( id );
23     }
24 
25 
26 import tk.mybatis.mapper.common.Mapper;
27 
28 /**
29  * 品牌数据访问接口
30  */
31 public interface BrandMapper extends Mapper<Brand> {
32 
33 
34 }

3.新增

 1 /**
 2      * 新增数据
 3      * @param brand
 4      * @return
 5      */
 6     @PostMapping
 7     public Result add( @RequestBody Brand brand){
 8         brandService.add( brand );
 9         return new Result(true,StatusCode.OK,"添加成功"  );
10     }
11 
12 
13 
14 
15 void add（Brand brand）;
16 
17 
18 
19 
20 
21 public void add (Brand brand){
22 brandMapper.insert(brand);}
23 
24 
25 import tk.mybatis.mapper.common.Mapper;
26 
27 /**
28  * 品牌数据访问接口
29  */
30 public interface BrandMapper extends Mapper<Brand> {
31 
32 
33 }

4.修改

@PutMapping("/id")

public Result update (@PathVariable Integer id,@RequestBody Brand brand){
brand.setId(id);
brandService.update(brand);
return new Result(true,StatueCode.Ok."修改成功")；
}


void update(Brand brand); 




public void update(Brand brand){
//brandMapper.update(brand);
brandMapper.updateByPrimaryKey(brand);


}

5.删除

 1 @RequestMapping("/id")
 2 public Result delete(@PathVariable Integer id){
 3 brandServie.delete(id);
 4 return new Result (true,StatuesCode.OK,"删除成功");
 5 
 6 }
 7 
 8 
 9 
10 
11 void delete（Integer id）;
12 
13 @Service
14 public void delete(Integer id){
15 brandMapper.deleteByPrimaryKey(id);
16 }

6.根据条件查询

 1 @GetMapping
 2 public Result findList(@RequestParam Map<String,String>searchMap){
 3 List<Brand> list=brandService.findList(searchMap);
 4 return new Result(ture,StatusCode.OK.list);
 5 }
 6 
 7 
 8 
 9 list<Brand> findList( Map<String,String> searchMap)
10 
11 
12 public List<Brand> findList(Map<String,String> searchMap){
13 Example example=this.createEWxample(searchMap)
14 return brandMapper.selecctByExample(example);
15 }
16 
17 private Example createExample(Map<String,String> searchMap){
18 Example example=new Example(Brand.class);
19  Example.Criteria criteria=example.createCriteria();
20 criteria.andLike("name","%"+searchMap.get("name")+"%");
21 
22 retuen example;
23 }

7.分页

    @GetMapping("/page/{page}/{size}")
    public Result findPage(@PathVariable int page,@PathVariable int size ){
        Page<Brand> brandPage = brandService.findPage( page, size );
        PageResult pageResult=new PageResult( brandPage.getTotal(),brandPage.getResult()  );
        return new Result( true,StatusCode.OK,"查询成功",pageResult );
    }

    Page<Brand> findPage(int page, int size);


    @Override
    public Page<Brand> findPage(int page, int size) {
        PageHelper.startPage( page,size );
        return (Page<Brand>)brandMapper.selectAll();
    }

8分页加条件

 1  /**
 2      * 条件+分页
 3      * @param searchMap 查询条件
 4      * @param page 页码
 5      * @param size 页大小
 6      * @return
 7      */
 8     @GetMapping("/search/{page}/{size}")
 9     public Result findPage(  @RequestParam Map<String,String> searchMap, @PathVariable int page,@PathVariable int size ){
10         Page<Brand> brandPage = brandService.findPage(searchMap, page, size );
11         PageResult pageResult=new PageResult( brandPage.getTotal(),brandPage.getResult()  );
12         return new Result( true,StatusCode.OK,"查询成功",pageResult );
13     }
14 
15   /**
16      * 条件+分页
17      * @param searchMap 查询条件
18      * @param page 页码
19      * @param size 页大小
20      * @return
21      */
22     Page<Brand> findPage(Map<String, String> searchMap, int page, int size);
23 
24 
25   @Override
26     public Page<Brand> findPage(Map<String, String> searchMap, int page, int size) {
27         PageHelper.startPage( page,size );
28         Example example = createExample( searchMap );
29         return (Page<Brand>)brandMapper.selectByExample( example );
30     }

 

posted @ 2019-07-01 21:57  枫糖浆  阅读(414)  评论(0)  编辑  收藏  举报