diff --git a/src/main/java/com/sipai/controller/watervolume/WaterVolumeLJLLController.java b/src/main/java/com/sipai/controller/watervolume/WaterVolumeLJLLController.java
new file mode 100644
index 00000000..32dd36f2
--- /dev/null
+++ b/src/main/java/com/sipai/controller/watervolume/WaterVolumeLJLLController.java
@@ -0,0 +1,125 @@
+package com.sipai.controller.watervolume;
+
+import com.sipai.service.scada.WaterVolumeLJLLService;
+import net.sf.json.JSONArray;
+import net.sf.json.JSONObject;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.annotation.Resource;
+import javax.servlet.http.HttpServletRequest;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 水量统计控制器
+ * 提供水量统计接口，支持动态表名查询
+ * 表名规则：tb_mp_{companyKey}_LJLL
+ */
+@Controller
+@RequestMapping("/watervolume")
+public class WaterVolumeLJLLController {
+    
+    @Resource
+    private WaterVolumeLJLLService waterVolumeLJLLService;
+    
+    /**
+     * 获取水量统计数据
+     * 
+     * @param companyKey 公司编码（如：DEV022），必填
+     * @return 统计数据JSON
+     * 
+     * 返回内容：
+     * - todayTotal: 今日处理总量
+     * - yesterdayTotal: 昨日处理总量
+     * - monthTotal: 本月累计总量
+     * - sevenDaysTotal: 七日水量处理总量（按日期分组）
+     * 
+     * 示例请求：/watervolume/getStatistics.do?companyKey=DEV022
+     */
+    @RequestMapping("/getStatistics.do")
+    public ModelAndView getStatistics(HttpServletRequest request, Model model,
+            @RequestParam(value = "companyKey") String companyKey) {
+        
+        JSONObject result = new JSONObject();
+        
+        try {
+            // 参数校验
+            if (companyKey == null || companyKey.trim().isEmpty()) {
+                result.put("success", false);
+                result.put("message", "companyKey参数不能为空");
+                model.addAttribute("result", result.toString());
+                return new ModelAndView("result");
+            }
+            
+            companyKey = companyKey.trim();
+            
+            // 检查表是否存在
+            if (!waterVolumeLJLLService.checkTableExists(companyKey)) {
+                result.put("success", false);
+                result.put("message", "未找到公司[" + companyKey + "]对应的水量数据表");
+                result.put("tableName", waterVolumeLJLLService.buildTableName(companyKey));
+                model.addAttribute("result", result.toString());
+                return new ModelAndView("result");
+            }
+            
+            // 今日处理总量
+            BigDecimal todayTotal = waterVolumeLJLLService.getTodayTotal(companyKey);
+            result.put("todayTotal", formatAmount(todayTotal));
+            
+            // 昨日处理总量
+            BigDecimal yesterdayTotal = waterVolumeLJLLService.getYesterdayTotal(companyKey);
+            result.put("yesterdayTotal", formatAmount(yesterdayTotal));
+            
+            // 本月累计总量
+            BigDecimal monthTotal = waterVolumeLJLLService.getMonthTotal(companyKey);
+            result.put("monthTotal", formatAmount(monthTotal));
+            
+            // 七日水量处理总量
+            List<Map<String, Object>> sevenDaysData = waterVolumeLJLLService.getSevenDaysTotal(companyKey);
+            JSONArray sevenDaysArray = new JSONArray();
+            if (sevenDaysData != null && !sevenDaysData.isEmpty()) {
+                for (Map<String, Object> dayData : sevenDaysData) {
+                    JSONObject dayJson = new JSONObject();
+                    dayJson.put("date", dayData.get("date"));
+                    Object totalObj = dayData.get("total");
+                    if (totalObj instanceof BigDecimal) {
+                        dayJson.put("total", formatAmount((BigDecimal) totalObj));
+                    } else if (totalObj instanceof Number) {
+                        dayJson.put("total", formatAmount(new BigDecimal(totalObj.toString())));
+                    } else {
+                        dayJson.put("total", "0.00");
+                    }
+                    sevenDaysArray.add(dayJson);
+                }
+            }
+            result.put("sevenDaysTotal", sevenDaysArray);
+            
+            result.put("success", true);
+            result.put("companyKey", companyKey);
+            result.put("tableName", waterVolumeLJLLService.buildTableName(companyKey));
+            
+        } catch (Exception e) {
+            result.put("success", false);
+            result.put("message", "获取统计数据失败：" + e.getMessage());
+        }
+        
+        model.addAttribute("result", result.toString());
+        return new ModelAndView("result");
+    }
+    
+    /**
+     * 格式化金额，保留2位小数
+     */
+    private String formatAmount(BigDecimal amount) {
+        if (amount == null) {
+            return "0.00";
+        }
+        return amount.setScale(2, RoundingMode.HALF_UP).toPlainString();
+    }
+}
diff --git a/src/main/java/com/sipai/dao/scada/WaterVolumeLJLLDao.java b/src/main/java/com/sipai/dao/scada/WaterVolumeLJLLDao.java
new file mode 100644
index 00000000..6a6dd651
--- /dev/null
+++ b/src/main/java/com/sipai/dao/scada/WaterVolumeLJLLDao.java
@@ -0,0 +1,78 @@
+package com.sipai.dao.scada;
+
+import com.sipai.dao.base.CommDaoImpl;
+import com.sipai.entity.watervolume.WaterVolumeLJLL;
+import org.springframework.stereotype.Repository;
+
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@Repository
+public class WaterVolumeLJLLDao extends CommDaoImpl<WaterVolumeLJLL> {
+    
+    private static final String MAPPER_NAMESPACE = "watervolume.WaterVolumeLJLLMapper";
+    
+    public WaterVolumeLJLLDao() {
+        super();
+        this.setMappernamespace(MAPPER_NAMESPACE);
+    }
+    
+    /**
+     * 获取今日处理总量
+     * @param tableName 表名（如：tb_mp_DEV022_LJLL）
+     * @return 今日处理总量
+     */
+    public BigDecimal selectTodayTotal(String tableName) {
+        Map<String, String> params = new HashMap<>();
+        params.put("tableName", tableName);
+        BigDecimal result = this.getSqlSession().selectOne(MAPPER_NAMESPACE + ".selectTodayTotal", params);
+        return result != null ? result : BigDecimal.ZERO;
+    }
+    
+    /**
+     * 获取昨日处理总量
+     * @param tableName 表名
+     * @return 昨日处理总量
+     */
+    public BigDecimal selectYesterdayTotal(String tableName) {
+        Map<String, String> params = new HashMap<>();
+        params.put("tableName", tableName);
+        BigDecimal result = this.getSqlSession().selectOne(MAPPER_NAMESPACE + ".selectYesterdayTotal", params);
+        return result != null ? result : BigDecimal.ZERO;
+    }
+    
+    /**
+     * 获取本月累计总量
+     * @param tableName 表名
+     * @return 本月累计总量
+     */
+    public BigDecimal selectMonthTotal(String tableName) {
+        Map<String, String> params = new HashMap<>();
+        params.put("tableName", tableName);
+        BigDecimal result = this.getSqlSession().selectOne(MAPPER_NAMESPACE + ".selectMonthTotal", params);
+        return result != null ? result : BigDecimal.ZERO;
+    }
+    
+    /**
+     * 获取七日水量处理总量
+     * @param tableName 表名
+     * @return 七日水量列表
+     */
+    public List<Map<String, Object>> selectSevenDaysTotal(String tableName) {
+        Map<String, String> params = new HashMap<>();
+        params.put("tableName", tableName);
+        return this.getSqlSession().selectList(MAPPER_NAMESPACE + ".selectSevenDaysTotal", params);
+    }
+    
+    /**
+     * 检查表是否存在
+     * @param tableName 表名
+     * @return 是否存在
+     */
+    public boolean checkTableExists(String tableName) {
+        Integer count = this.getSqlSession().selectOne(MAPPER_NAMESPACE + ".checkTableExists", tableName);
+        return count != null && count > 0;
+    }
+}
diff --git a/src/main/java/com/sipai/entity/watervolume/WaterVolumeLJLL.java b/src/main/java/com/sipai/entity/watervolume/WaterVolumeLJLL.java
new file mode 100644
index 00000000..c3c3a5b8
--- /dev/null
+++ b/src/main/java/com/sipai/entity/watervolume/WaterVolumeLJLL.java
@@ -0,0 +1,135 @@
+package com.sipai.entity.watervolume;
+
+import com.sipai.entity.base.SQLAdapter;
+
+import javax.persistence.Column;
+import javax.persistence.Id;
+import java.io.Serializable;
+import java.math.BigDecimal;
+import java.util.Date;
+
+/**
+ * 水量累计表实体类
+ * 表名规则：tb_mp_{companyKey}_LJLL
+ */
+public class WaterVolumeLJLL extends SQLAdapter implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * 自增主键
+     */
+    @Id
+    @Column(name = "ItemID")
+    private Long itemId;
+
+    /**
+     * 水量值
+     */
+    @Column(name = "ParmValue", precision = 18, scale = 4)
+    private BigDecimal parmValue;
+
+    /**
+     * 统计时间
+     */
+    @Column(name = "MeasureDT")
+    private Date measureDt;
+
+    /**
+     * 备注类型
+     */
+    @Column(name = "memotype", length = 100)
+    private String memotype;
+
+    /**
+     * 备注
+     */
+    @Column(name = "memo", length = 50)
+    private String memo;
+
+    /**
+     * 用户ID（公司标识）
+     */
+    @Column(name = "userid", length = 50)
+    private String userid;
+
+    /**
+     * 入库时间
+     */
+    @Column(name = "insdt")
+    private Date insdt;
+
+    // 构造方法
+    public WaterVolumeLJLL() {
+    }
+
+    // Getters 和 Setters
+    public Long getItemId() {
+        return itemId;
+    }
+
+    public void setItemId(Long itemId) {
+        this.itemId = itemId;
+    }
+
+    public BigDecimal getParmValue() {
+        return parmValue;
+    }
+
+    public void setParmValue(BigDecimal parmValue) {
+        this.parmValue = parmValue;
+    }
+
+    public Date getMeasureDt() {
+        return measureDt;
+    }
+
+    public void setMeasureDt(Date measureDt) {
+        this.measureDt = measureDt;
+    }
+
+    public String getMemotype() {
+        return memotype;
+    }
+
+    public void setMemotype(String memotype) {
+        this.memotype = memotype;
+    }
+
+    public String getMemo() {
+        return memo;
+    }
+
+    public void setMemo(String memo) {
+        this.memo = memo;
+    }
+
+    public String getUserid() {
+        return userid;
+    }
+
+    public void setUserid(String userid) {
+        this.userid = userid;
+    }
+
+    public Date getInsdt() {
+        return insdt;
+    }
+
+    public void setInsdt(Date insdt) {
+        this.insdt = insdt;
+    }
+
+    @Override
+    public String toString() {
+        return "WaterVolumeLJLL{" +
+                "itemId=" + itemId +
+                ", parmValue=" + parmValue +
+                ", measureDt=" + measureDt +
+                ", memotype='" + memotype + '\'' +
+                ", memo='" + memo + '\'' +
+                ", userid='" + userid + '\'' +
+                ", insdt=" + insdt +
+                '}';
+    }
+}
diff --git a/src/main/java/com/sipai/mapper/scada/WaterVolumeLJLLMapper.xml b/src/main/java/com/sipai/mapper/scada/WaterVolumeLJLLMapper.xml
new file mode 100644
index 00000000..64a39413
--- /dev/null
+++ b/src/main/java/com/sipai/mapper/scada/WaterVolumeLJLLMapper.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
+<mapper namespace="watervolume.WaterVolumeLJLLMapper">
+  <resultMap id="BaseResultMap" type="com.sipai.entity.watervolume.WaterVolumeLJLL" >
+    <id column="ItemID" property="itemId" jdbcType="BIGINT" />
+    <result column="ParmValue" property="parmValue" jdbcType="DECIMAL" />
+    <result column="MeasureDT" property="measureDt" jdbcType="TIMESTAMP" />
+    <result column="memotype" property="memotype" jdbcType="VARCHAR" />
+    <result column="memo" property="memo" jdbcType="VARCHAR" />
+    <result column="userid" property="userid" jdbcType="VARCHAR" />
+    <result column="insdt" property="insdt" jdbcType="TIMESTAMP" />
+  </resultMap>
+  
+  <sql id="Base_Column_List" >
+    ItemID, ParmValue, MeasureDT, memotype, memo, userid, insdt
+  </sql>
+  
+  <!-- 今日处理总量 -->
+  <select id="selectTodayTotal" resultType="java.math.BigDecimal">
+    SELECT ISNULL(SUM(ParmValue), 0)
+    FROM ${tableName}
+    WHERE CONVERT(VARCHAR(10), MeasureDT, 120) = CONVERT(VARCHAR(10), GETDATE(), 120)
+  </select>
+  
+  <!-- 昨日处理总量 -->
+  <select id="selectYesterdayTotal" resultType="java.math.BigDecimal">
+    SELECT ISNULL(SUM(ParmValue), 0)
+    FROM ${tableName}
+    WHERE CONVERT(VARCHAR(10), MeasureDT, 120) = CONVERT(VARCHAR(10), DATEADD(day, -1, GETDATE()), 120)
+  </select>
+  
+  <!-- 本月累计总量 -->
+  <select id="selectMonthTotal" resultType="java.math.BigDecimal">
+    SELECT ISNULL(SUM(ParmValue), 0)
+    FROM ${tableName}
+    WHERE YEAR(MeasureDT) = YEAR(GETDATE())
+      AND MONTH(MeasureDT) = MONTH(GETDATE())
+  </select>
+  
+  <!-- 七日水量处理总量 -->
+  <select id="selectSevenDaysTotal" resultType="java.util.Map">
+    SELECT 
+      CONVERT(VARCHAR(10), MeasureDT, 120) as date,
+      ISNULL(SUM(ParmValue), 0) as total
+    FROM ${tableName}
+    WHERE MeasureDT >= DATEADD(day, -6, CONVERT(VARCHAR(10), GETDATE(), 120))
+      AND MeasureDT &lt; DATEADD(day, 1, CONVERT(VARCHAR(10), GETDATE(), 120))
+    GROUP BY CONVERT(VARCHAR(10), MeasureDT, 120)
+    ORDER BY date ASC
+  </select>
+  
+  <!-- 检查表是否存在 -->
+  <select id="checkTableExists" resultType="int">
+    SELECT COUNT(*)
+    FROM INFORMATION_SCHEMA.TABLES
+    WHERE TABLE_NAME = #{tableName}
+  </select>
+</mapper>
diff --git a/src/main/java/com/sipai/service/scada/WaterVolumeLJLLService.java b/src/main/java/com/sipai/service/scada/WaterVolumeLJLLService.java
new file mode 100644
index 00000000..9424927f
--- /dev/null
+++ b/src/main/java/com/sipai/service/scada/WaterVolumeLJLLService.java
@@ -0,0 +1,110 @@
+package com.sipai.service.scada;
+
+import com.sipai.dao.scada.WaterVolumeLJLLDao;
+import com.sipai.entity.watervolume.WaterVolumeLJLL;
+import com.sipai.tools.CommService;
+import org.springframework.stereotype.Service;
+
+import javax.annotation.Resource;
+import java.math.BigDecimal;
+import java.util.List;
+import java.util.Map;
+
+@Service
+public class WaterVolumeLJLLService implements CommService<WaterVolumeLJLL> {
+    
+    @Resource
+    private WaterVolumeLJLLDao waterVolumeLJLLDao;
+    
+    /**
+     * 构建表名
+     * @param companyKey 公司编码（如：DEV022）
+     * @return 完整表名（如：tb_mp_DEV022_LJLL）
+     */
+    public String buildTableName(String companyKey) {
+        if (companyKey == null || companyKey.isEmpty()) {
+            throw new IllegalArgumentException("companyKey cannot be null or empty");
+        }
+        return "tb_mp_" + companyKey + "_LJLL";
+    }
+    
+    /**
+     * 检查表是否存在
+     * @param companyKey 公司编码
+     * @return 是否存在
+     */
+    public boolean checkTableExists(String companyKey) {
+        String tableName = buildTableName(companyKey);
+        return waterVolumeLJLLDao.checkTableExists(tableName);
+    }
+    
+    /**
+     * 获取今日处理总量
+     * @param companyKey 公司编码
+     * @return 今日处理总量
+     */
+    public BigDecimal getTodayTotal(String companyKey) {
+        String tableName = buildTableName(companyKey);
+        return waterVolumeLJLLDao.selectTodayTotal(tableName);
+    }
+    
+    /**
+     * 获取昨日处理总量
+     * @param companyKey 公司编码
+     * @return 昨日处理总量
+     */
+    public BigDecimal getYesterdayTotal(String companyKey) {
+        String tableName = buildTableName(companyKey);
+        return waterVolumeLJLLDao.selectYesterdayTotal(tableName);
+    }
+    
+    /**
+     * 获取本月累计总量
+     * @param companyKey 公司编码
+     * @return 本月累计总量
+     */
+    public BigDecimal getMonthTotal(String companyKey) {
+        String tableName = buildTableName(companyKey);
+        return waterVolumeLJLLDao.selectMonthTotal(tableName);
+    }
+    
+    /**
+     * 获取七日水量处理总量
+     * @param companyKey 公司编码
+     * @return 七日水量列表
+     */
+    public List<Map<String, Object>> getSevenDaysTotal(String companyKey) {
+        String tableName = buildTableName(companyKey);
+        return waterVolumeLJLLDao.selectSevenDaysTotal(tableName);
+    }
+    
+    @Override
+    public WaterVolumeLJLL selectById(String id) {
+        return null;
+    }
+    
+    @Override
+    public int deleteById(String id) {
+        return 0;
+    }
+    
+    @Override
+    public int save(WaterVolumeLJLL entity) {
+        return 0;
+    }
+    
+    @Override
+    public int update(WaterVolumeLJLL entity) {
+        return 0;
+    }
+    
+    @Override
+    public List<WaterVolumeLJLL> selectListByWhere(String wherestr) {
+        return null;
+    }
+    
+    @Override
+    public int deleteByWhere(String wherestr) {
+        return 0;
+    }
+}