add:menu

menu/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>demo-parent</artifactId>
+        <groupId>com.duanledexianxianxian.demo</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>menu</artifactId>
+
+
+
+</project>
\ No newline at end of file

menu/src/main/java/com/duanledexianxianxian/demo/Application.java

+package com.duanledexianxianxian.demo;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.Lists;
+import org.springframework.beans.BeanUtils;
+import org.springframework.util.CollectionUtils;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * @author duanledexianxianxian
+ * @date 2020/1/12 23:51
+ * @since 1.0.0
+ */
+public class Application {
+    private static String[][] menus = {
+            {null, "0001", "用户管理", "/urlMgr"},
+            {"0001", "00010001", "用户管理-添加用户", "/urlMgr/add"},
+            {"0001", "00010002", "用户管理-修改用户", "/urlMgr/edit"},
+            {"0001", "00010003", "用户管理-删除用户", "/urlMgr/delete"},
+            {"0001", "00010004", "用户管理-查询用户", "/urlMgr/query"},
+            {null, "0002", "系统管理", "/systemMgr"},
+            {"0002", "00020001", "系统管理-系统管理0001", "/systemMgr/0001"},
+            {"00020001", "000200010001", "系统管理-系统管理0001-系统管理0001", "/systemMgr/0001/0001"},
+            {"000200010001", "0002000100010001", "系统管理-系统管理0001-系统管理0001-系统管理0001", "/systemMgr/0001/0001/0001"},
+    };
+
+    public static void main(String[] args) {
+        List<Menu> menuList = Lists.newArrayList();
+        Arrays.asList(menus).forEach(x -> {
+            Menu menu = new Menu();
+            menu.setParentMenuCode(x[0]);
+            menu.setMenuCode(x[1]);
+            menu.setMenuTitle(x[2]);
+            menu.setMenuUrl(x[3]);
+            menuList.add(menu);
+        });
+
+        menuList.forEach(x -> System.out.println(x.toString()));
+        MenuVO menuVO = getTreeMenuVO(menuList);
+        ObjectMapper mapper = new ObjectMapper();
+        try {
+            System.out.println(mapper.writeValueAsString(menuVO));
+        } catch (JsonProcessingException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static MenuVO getTreeMenuVO(List<Menu> menuList) {
+        if (CollectionUtils.isEmpty(menuList)) {
+            return null;
+        }
+        List<MenuVO> menuVOList = Lists.newArrayList();
+        menuList.forEach(x -> {
+            MenuVO menuVO = new MenuVO();
+            BeanUtils.copyProperties(x, menuVO);
+            menuVOList.add(menuVO);
+        });
+        // 转成map
+        Map<String, MenuVO> menuMap = menuVOList.stream().collect(Collectors.toMap(MenuVO::getMenuCode, x -> x));
+        // 构建根节点
+        MenuVO menuVO = new MenuVO();
+        menuVO.setParentMenuCode(null);
+        menuVO.setMenuCode("root");
+        menuVO.setMenuTitle("根节点");
+
+        for (MenuVO menu : menuVOList) {
+            if (menuMap.containsKey(menu.getParentMenuCode())) {
+                if (menuMap.get(menu.getParentMenuCode()).getChildren() == null) {
+                    menuMap.get(menu.getParentMenuCode()).setChildren(Lists.newArrayList());
+                }
+                menuMap.get(menu.getParentMenuCode()).getChildren().add(menu);
+
+            } else {
+                if (menuVO.getChildren() == null) {
+                    menuVO.setChildren(Lists.newArrayList());
+                }
+                menuVO.getChildren().add(menu);
+            }
+        }
+        return menuVO;
+    }
+}

menu/src/main/java/com/duanledexianxianxian/demo/Menu.java

+package com.duanledexianxianxian.demo;
+
+import lombok.Data;
+
+/**
+ * 菜单
+ *
+ * @author duanledexianxianxian
+ * @date 2020/1/12 23:49
+ * @since 1.0.0
+ */
+@Data
+public class Menu {
+    private String parentMenuCode;
+    private String menuCode;
+    private String menuTitle;
+    private String menuUrl;
+}

menu/src/main/java/com/duanledexianxianxian/demo/MenuVO.java

+package com.duanledexianxianxian.demo;
+
+import lombok.Data;
+
+import java.util.List;
+
+/**
+ * 菜单
+ *
+ * @author duanledexianxianxian
+ * @date 2020/1/12 23:49
+ * @since 1.0.0
+ */
+@Data
+public class MenuVO {
+    private String parentMenuCode;
+    private String menuCode;
+    private String menuTitle;
+    private String menuUrl;
+    private List<MenuVO> children;
+}

pom.xml

@@ -10,6 +10,7 @@
     <version>1.0-SNAPSHOT</version>
     <modules>
         <module>kafka</module>
+        <module>menu</module>
     </modules>
 
     <parent>
@@ -39,6 +40,12 @@
             <artifactId>json-path</artifactId>
             <scope>test</scope>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>23.0</version>
+        </dependency>
     </dependencies>
 
     <properties>