feat(roll): 完成轧辊管理全栈模块

DB：mill_roll（轧辊库）+ mill_roll_change（换辊记录），已执行到服务器

后端：
- MillRoll / MillRollChange domain
- Mapper 接口 + XML（keyProperty 正确：rollId/changeId）
- Service + ServiceImpl（换辊时自动更新轧辊 status 为 Online Use）
- MillRollController /mill/roll + MillRollChangeController /mill/rollChange

前端：
- api/mill/roll.js 8个接口函数
- views/mill/roll.vue 三段式布局
  ·上：换辊数据历史表格
  ·左下：当前辊系参数（6辊图形 CSS 圆圈 + 编号/径/时间展示）
  ·右下：轧辊库表格 + 条件查询 + 更换/添加/修改/删除操作
- 路由注册 /mill/roll

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ruoyi-mill/src/main/java/com/ruoyi/mill/controller/MillRollChangeController.java

@@ -0,0 +1,33 @@
+package com.ruoyi.mill.controller;
+
+import com.ruoyi.common.core.controller.BaseController;
+import com.ruoyi.common.core.domain.AjaxResult;
+import com.ruoyi.common.core.page.TableDataInfo;
+import com.ruoyi.mill.domain.MillRollChange;
+import com.ruoyi.mill.service.IMillRollChangeService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/mill/rollChange")
+public class MillRollChangeController extends BaseController {
+
+    @Autowired
+    private IMillRollChangeService changeService;
+
+    @GetMapping("/list")
+    public TableDataInfo list(MillRollChange query) {
+        startPage();
+        return getDataTable(changeService.selectList(query));
+    }
+
+    @GetMapping("/current")
+    public AjaxResult current() {
+        return AjaxResult.success(changeService.selectLatest());
+    }
+
+    @PostMapping
+    public AjaxResult add(@RequestBody MillRollChange change) {
+        return toAjax(changeService.addChange(change));
+    }
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/controller/MillRollController.java

@@ -0,0 +1,47 @@
+package com.ruoyi.mill.controller;
+
+import com.ruoyi.common.core.controller.BaseController;
+import com.ruoyi.common.core.domain.AjaxResult;
+import com.ruoyi.common.core.page.TableDataInfo;
+import com.ruoyi.mill.domain.MillRoll;
+import com.ruoyi.mill.service.IMillRollService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/mill/roll")
+public class MillRollController extends BaseController {
+
+    @Autowired
+    private IMillRollService rollService;
+
+    @GetMapping("/list")
+    public TableDataInfo list(MillRoll query) {
+        startPage();
+        return getDataTable(rollService.selectList(query));
+    }
+
+    @GetMapping("/{id}")
+    public AjaxResult getInfo(@PathVariable Long id) {
+        return AjaxResult.success(rollService.selectById(id));
+    }
+
+    @PostMapping
+    public AjaxResult add(@RequestBody MillRoll roll) {
+        int rows = rollService.insert(roll);
+        if (rows > 0) {
+            return AjaxResult.success(roll.getRollId());
+        }
+        return AjaxResult.error("新增失败");
+    }
+
+    @PutMapping
+    public AjaxResult edit(@RequestBody MillRoll roll) {
+        return toAjax(rollService.update(roll));
+    }
+
+    @DeleteMapping("/{ids}")
+    public AjaxResult remove(@PathVariable Long[] ids) {
+        return toAjax(rollService.deleteByIds(ids));
+    }
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/domain/MillRoll.java

@@ -0,0 +1,33 @@
+package com.ruoyi.mill.domain;
+
+import com.ruoyi.common.core.domain.BaseEntity;
+import lombok.Data;
+import java.math.BigDecimal;
+
+/** 轧辊库 */
+@Data
+public class MillRoll extends BaseEntity {
+
+    private Long rollId;
+
+    /** 轧辊编号 */
+    private String rollNo;
+
+    /** 轧辊类型 WR/IR/BR */
+    private String rollType;
+
+    /** 使用状态 */
+    private String status;
+
+    /** 初始辊径(mm) */
+    private BigDecimal initialDia;
+
+    /** 当前辊径(mm) */
+    private BigDecimal currentDia;
+
+    /** 标志位 */
+    private String flag;
+
+    /** 删除标志 0正常 2删除 */
+    private String delFlag;
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/domain/MillRollChange.java

@@ -0,0 +1,60 @@
+package com.ruoyi.mill.domain;
+
+import com.ruoyi.common.core.domain.BaseEntity;
+import com.fasterxml.jackson.annotation.JsonFormat;
+import lombok.Data;
+import java.math.BigDecimal;
+import java.util.Date;
+
+/** 换辊记录 */
+@Data
+public class MillRollChange extends BaseEntity {
+
+    private Long changeId;
+
+    /** 换辊时间 */
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
+    private Date changeTime;
+
+    /** 换辊状态 */
+    private String changeStatus;
+
+    /** 上工作辊编号 */
+    private String upperWrNo;
+
+    /** 上工作辊径(mm) */
+    private BigDecimal upperWrDia;
+
+    /** 下工作辊编号 */
+    private String lowerWrNo;
+
+    /** 下工作辊径(mm) */
+    private BigDecimal lowerWrDia;
+
+    /** 上中间辊编号 */
+    private String upperIrNo;
+
+    /** 上中间辊径(mm) */
+    private BigDecimal upperIrDia;
+
+    /** 下中间辊编号 */
+    private String lowerIrNo;
+
+    /** 下中间辊径(mm) */
+    private BigDecimal lowerIrDia;
+
+    /** 上支承辊编号 */
+    private String upperBrNo;
+
+    /** 上支承辊径(mm) */
+    private BigDecimal upperBrDia;
+
+    /** 下支承辊编号 */
+    private String lowerBrNo;
+
+    /** 下支承辊径(mm) */
+    private BigDecimal lowerBrDia;
+
+    /** 删除标志 0正常 2删除 */
+    private String delFlag;
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/mapper/MillRollChangeMapper.java

@@ -0,0 +1,13 @@
+package com.ruoyi.mill.mapper;
+
+import com.ruoyi.mill.domain.MillRollChange;
+import java.util.List;
+
+public interface MillRollChangeMapper {
+
+    List<MillRollChange> selectList(MillRollChange query);
+
+    MillRollChange selectLatest();
+
+    int insert(MillRollChange change);
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/mapper/MillRollMapper.java

@@ -0,0 +1,20 @@
+package com.ruoyi.mill.mapper;
+
+import com.ruoyi.mill.domain.MillRoll;
+import org.apache.ibatis.annotations.Param;
+import java.util.List;
+
+public interface MillRollMapper {
+
+    List<MillRoll> selectList(MillRoll query);
+
+    MillRoll selectById(Long rollId);
+
+    int insert(MillRoll roll);
+
+    int update(MillRoll roll);
+
+    int deleteByIds(Long[] ids);
+
+    int updateStatus(@Param("rollId") Long rollId, @Param("status") String status);
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/service/IMillRollChangeService.java

@@ -0,0 +1,13 @@
+package com.ruoyi.mill.service;
+
+import com.ruoyi.mill.domain.MillRollChange;
+import java.util.List;
+
+public interface IMillRollChangeService {
+
+    List<MillRollChange> selectList(MillRollChange query);
+
+    MillRollChange selectLatest();
+
+    int addChange(MillRollChange change);
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/service/IMillRollService.java

@@ -0,0 +1,17 @@
+package com.ruoyi.mill.service;
+
+import com.ruoyi.mill.domain.MillRoll;
+import java.util.List;
+
+public interface IMillRollService {
+
+    List<MillRoll> selectList(MillRoll query);
+
+    MillRoll selectById(Long rollId);
+
+    int insert(MillRoll roll);
+
+    int update(MillRoll roll);
+
+    int deleteByIds(Long[] ids);
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/service/impl/MillRollChangeServiceImpl.java

@@ -0,0 +1,77 @@
+package com.ruoyi.mill.service.impl;
+
+import com.ruoyi.common.utils.SecurityUtils;
+import com.ruoyi.mill.domain.MillRoll;
+import com.ruoyi.mill.domain.MillRollChange;
+import com.ruoyi.mill.mapper.MillRollChangeMapper;
+import com.ruoyi.mill.mapper.MillRollMapper;
+import com.ruoyi.mill.service.IMillRollChangeService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Date;
+import java.util.List;
+
+@Service
+public class MillRollChangeServiceImpl implements IMillRollChangeService {
+
+    @Autowired
+    private MillRollChangeMapper changeMapper;
+
+    @Autowired
+    private MillRollMapper rollMapper;
+
+    @Override
+    public List<MillRollChange> selectList(MillRollChange query) {
+        return changeMapper.selectList(query);
+    }
+
+    @Override
+    public MillRollChange selectLatest() {
+        return changeMapper.selectLatest();
+    }
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public int addChange(MillRollChange change) {
+        String user = SecurityUtils.getUsername();
+        change.setCreateBy(user);
+        change.setUpdateBy(user);
+        change.setDelFlag("0");
+        if (change.getChangeTime() == null) {
+            change.setChangeTime(new Date());
+        }
+        if (change.getChangeStatus() == null || change.getChangeStatus().isEmpty()) {
+            change.setChangeStatus("新辊换上");
+        }
+
+        int rows = changeMapper.insert(change);
+
+        // Update roll status to "Online Use" for each populated roll position
+        updateRollStatusByNo(change.getUpperWrNo(), "Online Use");
+        updateRollStatusByNo(change.getLowerWrNo(), "Online Use");
+        updateRollStatusByNo(change.getUpperIrNo(), "Online Use");
+        updateRollStatusByNo(change.getLowerIrNo(), "Online Use");
+        updateRollStatusByNo(change.getUpperBrNo(), "Online Use");
+        updateRollStatusByNo(change.getLowerBrNo(), "Online Use");
+
+        return rows;
+    }
+
+    /**
+     * Find roll by roll_no and update its status.
+     * Silently skips if roll_no is blank or roll not found.
+     */
+    private void updateRollStatusByNo(String rollNo, String newStatus) {
+        if (rollNo == null || rollNo.trim().isEmpty()) {
+            return;
+        }
+        MillRoll query = new MillRoll();
+        query.setRollNo(rollNo.trim());
+        List<MillRoll> list = rollMapper.selectList(query);
+        if (!list.isEmpty()) {
+            rollMapper.updateStatus(list.get(0).getRollId(), newStatus);
+        }
+    }
+}

ruoyi-mill/src/main/java/com/ruoyi/mill/service/impl/MillRollServiceImpl.java

@@ -0,0 +1,49 @@
+package com.ruoyi.mill.service.impl;
+
+import com.ruoyi.common.utils.SecurityUtils;
+import com.ruoyi.mill.domain.MillRoll;
+import com.ruoyi.mill.mapper.MillRollMapper;
+import com.ruoyi.mill.service.IMillRollService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import java.util.List;
+
+@Service
+public class MillRollServiceImpl implements IMillRollService {
+
+    @Autowired
+    private MillRollMapper rollMapper;
+
+    @Override
+    public List<MillRoll> selectList(MillRoll query) {
+        return rollMapper.selectList(query);
+    }
+
+    @Override
+    public MillRoll selectById(Long rollId) {
+        return rollMapper.selectById(rollId);
+    }
+
+    @Override
+    public int insert(MillRoll roll) {
+        String user = SecurityUtils.getUsername();
+        roll.setCreateBy(user);
+        roll.setUpdateBy(user);
+        roll.setDelFlag("0");
+        if (roll.getStatus() == null || roll.getStatus().isEmpty()) {
+            roll.setStatus("Offline");
+        }
+        return rollMapper.insert(roll);
+    }
+
+    @Override
+    public int update(MillRoll roll) {
+        roll.setUpdateBy(SecurityUtils.getUsername());
+        return rollMapper.update(roll);
+    }
+
+    @Override
+    public int deleteByIds(Long[] ids) {
+        return rollMapper.deleteByIds(ids);
+    }
+}