今天前端问我能不能帮忙把菜单数据存进去，我看了下大概就是下面这样的数据结构，就是一个 JSON 数组，然后里面有 children
bash
[
{
"name": "1001",
"path": "/1001",
"component": "1001.base",
"meta": {
"title": "1001",
"i18nKey": "1001.base",
"order": 1
},
"children": [
{
"name": "100101",
"path": "/1001/01",
"component": "1001.01",
"meta": {
"title": "100101",
"i18nKey": "1001.01"
},
"children": [
{
"name": "10010101",
"path": "/1001/01/01",
"component": "1001.01.01",
"meta": {
"title": "10010101",
"i18nKey": "1001.01.01"
}
}
]
}
]
},
{
"name": "1002",
"path": "/1002",
"component": "1002.base",
"meta": {
"title": "1002",
"i18nKey": "1002.base",
"order": 1
},
"children": [
{
"name": "100201",
"path": "/1002/01",
"component": "1002.01",
"meta": {
"title": "100201",
"i18nKey": "1002.01"
}
}
]
}
]然后写了方法用来解析他给我的文本，这里因为里面就一个JSON格式的字符串，我直接把后缀改成了 .json，通过 JsonNode 再递归获取数据
java
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.File;
import java.sql.*;
import java.util.*;
public class MenuParser {
private static final String DB_URL = "jdbc:mysql://192.168.1.119:3306/ceshi?useUnicode=true&characterEncoding=utf-8&useSSL=false";
private static final String DB_USER = "admin";
private static final String DB_PASSWORD = "px123456";
public static void main(String[] args) {
try {
// 读取 JSON 文件
ObjectMapper objectMapper = new ObjectMapper();
JsonNode rootNode = objectMapper.readTree(new File("C:\\Users\\72364\\Desktop\\fsdownload\\menu.json"));
// 存储菜单项，使用 tempId 作为 key
Map<String, MenuItem> menuMap = new LinkedHashMap<>();
parseMenu(rootNode, null, menuMap); // 递归解析
// 插入数据到数据库，并更新 parentId
insertMenusIntoDB(menuMap);
System.out.println("✅ 数据插入成功，所有层级已正确关联！");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* **递归解析 JSON，分配临时 ID，并维护父子关系**
* @param nodeList JSON 菜单数据
* @param parentTempId 父级的临时 ID
* @param menuMap 存储解析后的菜单项
*/
private static void parseMenu(JsonNode nodeList, String parentTempId, Map<String, MenuItem> menuMap) {
for (JsonNode node : nodeList) {
MenuItem menu = new MenuItem(node);
String tempId = UUID.randomUUID().toString(); // 生成临时 ID
menu.setTempId(tempId);
menu.setParentTempId(parentTempId); // 关联父级的 tempId
menuMap.put(tempId, menu);
// 递归解析子菜单
JsonNode children = node.get("children");
if (children != null && children.isArray()) {
parseMenu(children, tempId, menuMap);
}
}
}
/**
* **插入菜单数据，并更新 parentId**
* @param menuMap 存储解析后的菜单项
*/
private static void insertMenusIntoDB(Map<String, MenuItem> menuMap) {
String insertSQL = "INSERT INTO qy_platform_menu (parent_id, status, menu_type, menu_name, route_name, " +
"route_path, component, `order`, i18nKey, icon, hide_in_menu, keep_alive, create_time, update_time, del_flag) " +
"VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW(), NOW(), ?)";
String updateSQL = "UPDATE qy_platform_menu SET parent_id = ? WHERE id = ?";
Map<String, Long> tempIdToDbId = new HashMap<>(); // 记录 tempId → 数据库 ID
try (Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD)) {
conn.setAutoCommit(false); // 开启事务
// **第一遍插入数据库**
try (PreparedStatement pstmt = conn.prepareStatement(insertSQL, Statement.RETURN_GENERATED_KEYS)) {
for (MenuItem menu : menuMap.values()) {
pstmt.setObject(1, null); // 先插入，parentId 设为 null
pstmt.setInt(2, 1);
pstmt.setString(3, menu.getMenuType());
pstmt.setString(4, menu.getMenuName());
pstmt.setString(5, menu.getRouteName());
pstmt.setString(6, menu.getRoutePath());
pstmt.setString(7, menu.getComponent());
pstmt.setInt(8, menu.getOrder() != null ? menu.getOrder() : 0);
pstmt.setString(9, menu.getI18nKey());
pstmt.setString(10, menu.getIcon());
pstmt.setInt(11, 0);
pstmt.setInt(12, 0);
pstmt.setInt(13, 0);
pstmt.executeUpdate();
// 获取新插入的 ID
try (ResultSet rs = pstmt.getGeneratedKeys()) {
if (rs.next()) {
long newId = rs.getLong(1);
tempIdToDbId.put(menu.getTempId(), newId);
menu.setId(newId);
}
}
}
}
// **第二遍：更新 parentId**
try (PreparedStatement updateStmt = conn.prepareStatement(updateSQL)) {
for (MenuItem menu : menuMap.values()) {
if (menu.getParentTempId() != null && tempIdToDbId.containsKey(menu.getParentTempId())) {
long parentId = tempIdToDbId.get(menu.getParentTempId());
long menuId = menu.getId();
updateStmt.setLong(1, parentId);
updateStmt.setLong(2, menuId);
updateStmt.executeUpdate();
}
}
}
conn.commit(); // 提交事务
System.out.println("✅ 数据插入完成，parentId 关联成功！");
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
* **执行插入 SQL 并获取生成的 ID**
*/
private static long insertMenuAndGetId(PreparedStatement pstmt, MenuItem menu) throws SQLException {
pstmt.setObject(1, menu.getParentId());
pstmt.setInt(2, 1);
pstmt.setString(3, menu.getMenuType());
pstmt.setString(4, menu.getMenuName());
pstmt.setString(5, menu.getRouteName());
pstmt.setString(6, menu.getRoutePath());
pstmt.setString(7, menu.getComponent());
pstmt.setInt(8, menu.getOrder() != null ? menu.getOrder() : 0);
pstmt.setString(9, menu.getI18nKey());
pstmt.setString(10, menu.getIcon());
pstmt.setInt(11, 0);
pstmt.setInt(12, 0);
pstmt.setInt(13, 0);
pstmt.executeUpdate();
try (ResultSet rs = pstmt.getGeneratedKeys()) {
if (rs.next()) {
return rs.getLong(1);
}
}
return -1;
}
}这里加了个临时 ID 用来处理上下级的父子关联
java
import com.fasterxml.jackson.databind.JsonNode;
import lombok.Data;
@Data
public class MenuItem {
private Long id; // 数据库 ID
private Long parentId; // 真实 parent_id
private String tempId; // 临时 ID
private String parentTempId; // 临时 parent_id
private Integer status;
private String menuType;
private String menuName;
private String routeName;
private String routePath;
private String component;
private Integer order;
private String i18nKey;
private String icon;
public MenuItem(JsonNode node) {
if (node.get("name") != null) this.routeName = node.get("name").asText();
if (node.get("path") != null) this.routePath = node.get("path").asText();
if (node.get("component") != null) this.component = node.get("component").asText();
if (node.get("meta") != null) {
if (node.get("meta").get("order") != null) this.order = node.get("meta").get("order").asInt();
if (node.get("meta").get("title") != null) this.menuName = node.get("meta").get("title").asText();
if (node.get("meta").get("i18nKey") != null) this.i18nKey = node.get("meta").get("i18nKey").asText();
if (node.get("meta").get("icon") != null) this.icon = node.get("meta").get("icon").asText();
}
}
}可以看到数据正常存进去了
