查找并写入CPU唯一值

src/main/java/com/archser/aserver/controller/SnController.java

 package com.archser.aserver.controller;
 
 import com.archser.aserver.service.SnService;
+import com.jfinal.aop.Clear;
 import com.jfinal.aop.Inject;
 import com.jfinal.core.Controller;
+import com.jfinal.kit.Ret;
+import com.jfinal.kit.StrKit;
 
 
 public class SnController extends Controller {
@@ -11,5 +14,23 @@ public class SnController extends Controller {
   SnService snService;
 
 
+  /**
+   * 获取序列号
+   */
+  @Clear
+  public void getPropertiesValue() {
+    String cupCode = getPara("cupCode");
+    try {
+      String snCode = snService.getPropertiesValue(cupCode);
+      if (StrKit.isBlank(snCode)) {
+        snService.setProperty(cupCode, "");
+      }
+      renderJson(Ret.ok("snCode", snCode));
+    } catch (Exception e) {
+      e.printStackTrace();
+      renderJson(Ret.fail());
+    }
+  }
+
 
 }

src/main/java/com/archser/aserver/service/SnService.java

 package com.archser.aserver.service;
 
+
+import com.archser.aserver.util.PropertyUtil;
+import com.jfinal.kit.PathKit;
+import com.jfinal.kit.PropKit;
+import java.io.File;
+
+
+/**
+ * 读写 SN配置文件 20201201 lidecai
+ */
 public class SnService {
 
+  private static String FILE_PATH;
+
+  static {
+    FILE_PATH = PathKit.getWebRootPath() + File.separator + "SN.properties";
+  }
+
+
+  /**
+   * 从  Properties 文件中获取指定对应的值
+   *
+   * @param cupCode
+   * @return
+   */
+  public String getPropertiesValue(String cupCode) {
+    return PropKit.use(new File(FILE_PATH)).get(cupCode);
+  }
+
+
+  /**
+   * 向 Properties 写入
+   *
+   * @param cupCode
+   * @param snCode
+   */
+  public void setProperty(String cupCode, String snCode)  {
+    PropertyUtil.setProperty(cupCode, snCode, FILE_PATH);
+  }
+
 
 }

src/main/java/com/archser/aserver/util/PropertyUtil.java

+package com.archser.aserver.util;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Objects;
+import java.util.Properties;
+
+
+/**
+ * 20201201 lidecai 读写 Property 文件工具类
+ */
+public class PropertyUtil {
+
+
+  /**
+   * 读取配置文件中的值
+   *
+   * @param key
+   * @return
+   */
+  public static String getProperty(String key, String filePath) {
+    String value = "";
+    Properties props = new Properties();
+    InputStream input = null;
+    try {
+      input = new FileInputStream(filePath);
+      props.load(input);
+      value = props.getProperty(key);
+    } catch (IOException e) {
+      e.printStackTrace();
+    } finally {
+      try {
+        Objects.requireNonNull(input).close();
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+    }
+    return value;
+  }
+
+
+  /**
+   * 向配置文件中写值
+   * @param key
+   * @param value
+   * @param filePath
+   */
+  public static void setProperty(String key, String value, String filePath) {
+    Properties props = new Properties();
+    OutputStream out = null;
+    InputStream input = null;
+    try {
+      input = new FileInputStream(filePath);
+      props.load(input);
+      props.setProperty(key, value);
+      out = new FileOutputStream(filePath);
+      props.store(out, null);
+    } catch (IOException e) {
+      e.printStackTrace();
+    } finally {
+      try {
+        Objects.requireNonNull(input).close();
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+      try {
+        Objects.requireNonNull(out).close();
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+    }
+  }
+
+}

src/main/webapp/SN.properties

+#Tue Dec 01 16:02:59 CST 2020
+AAAAAAAAAAAAAAA=cdcdcdcdcdc