feat: 增加计量单位的接口

src/main/java/com/xydl/cac/controller/UnitController.java

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+package com.xydl.cac.controller;
+
+import com.xydl.cac.entity.Unit;
+import com.xydl.cac.exception.BusinessException;
+import com.xydl.cac.model.Response;
+import com.xydl.cac.service.UnitService;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+import javax.annotation.Resource;
+import javax.validation.constraints.NotNull;
+import java.util.List;
+
+@RestController
+@Api(tags = {"计量单位相关接口"})
+@RequestMapping("unit")
+@Slf4j
+public class UnitController extends BasicController {
+
+    @Resource
+    UnitService service;
+
+    @GetMapping("listAll")
+    @ApiOperation("查询全部列表")
+    public Response<List<Unit>> listAll() {
+        List<Unit> result = service.listAll();
+        return Response.success(result);
+    }
+
+    @PostMapping("add")
+    @ApiOperation("新增")
+    public Response<Unit> add(@Validated @RequestBody Unit item) throws Exception {
+        Unit result = service.add(item);
+        return Response.success(result);
+    }
+
+    @PostMapping("update")
+    @ApiOperation("更新")
+    public Response<String> update(@Validated @RequestBody Unit item) throws Exception {
+        if (item.getId() == null) {
+            throw new BusinessException("ID不能为空!");
+        }
+        service.update(item);
+        return Response.success("OK");
+    }
+
+    @PostMapping("delete")
+    @ApiOperation("删除")
+    public Response<String> delete(@Validated @NotNull(message = "ID不能为空!") Integer id) {
+        service.delete(id);
+        return Response.success("OK");
+    }
+
+}

src/main/java/com/xydl/cac/entity/Unit.java

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+package com.xydl.cac.entity;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+import javax.validation.constraints.NotBlank;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+@Entity
+@Table(name = "unit")
+@ApiModel("计量单位表")
+public class Unit {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Integer id;
+
+    @NotBlank(message = "字段不能为空")
+    @ApiModelProperty("字段")
+    @Column(name = "field")
+    private String field;
+
+    @ApiModelProperty("单位")
+    @Column(name = "unit")
+    private String unit;
+
+}

src/main/java/com/xydl/cac/repository/UnitRepository.java

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+package com.xydl.cac.repository;
+
+import com.xydl.cac.entity.Unit;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface UnitRepository extends JpaRepository<Unit, Integer>, JpaSpecificationExecutor<Unit> {
+    List<Unit> findByField(String field);
+}

src/main/java/com/xydl/cac/service/UnitService.java

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+package com.xydl.cac.service;
+
+import com.xydl.cac.entity.Unit;
+
+import java.util.List;
+
+public interface UnitService {
+
+    List<Unit> listAll();
+
+    Unit add(Unit item) throws Exception;
+
+    void update(Unit item) throws Exception;
+
+    void delete(Integer id);
+}

src/main/java/com/xydl/cac/service/impl/UnitServiceImpl.java

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+package com.xydl.cac.service.impl;
+
+import com.xydl.cac.entity.Unit;
+import com.xydl.cac.exception.BusinessException;
+import com.xydl.cac.repository.UnitRepository;
+import com.xydl.cac.service.UnitService;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.CollectionUtils;
+
+import javax.annotation.Resource;
+import java.util.List;
+
+@Service
+@Slf4j
+@Transactional(rollbackFor = Exception.class)
+public class UnitServiceImpl implements UnitService {
+
+    @Resource
+    UnitRepository repository;
+
+    @Override
+    public List<Unit> listAll() {
+        return repository.findAll();
+    }
+
+    @Override
+    public Unit add(Unit item) throws Exception {
+        item.setId(null);
+        List<Unit> list = repository.findByField(item.getField());
+        if (!CollectionUtils.isEmpty(list)) {
+            throw new BusinessException("该字段已存在");
+        }
+        return repository.save(item);
+    }
+
+    @Override
+    public void update(Unit item) throws Exception {
+        repository.save(item);
+    }
+
+    @Override
+    public void delete(Integer id) {
+        repository.deleteById(id);
+    }
+}