总览

let list = [{ id: 1, name: '部门A', parentId: 0 }, { id: 2, name: '部门B', parentId: 0 }, { id: 3, name: '部门C', parentId: 1 }, { id: 4, name: '部门D', parentId: 1 }, { id: 5, name: '部门E', parentId: 2 }, { id: 6, name: '部门F', parentId: 3 }, { id: 7, name: '部门G', parentId: 2 }, { id: 8, name: '部门H', parentId: 4 } ]; // 转换后的结果如下 let result = [{ id: 1, name: '部门A', parentId: 0, children: [{ id: 3, name: '部门C', parentId: 1, children: [{ id: 6, name: '部门F', parentId: 3 }, { id: 16, name: '部门L', parentId: 3 }] }, { id: 4, name: '部门D', parentId: 1, children: [{ id: 8, name: '部门H', parentId: 4 }] } ] }]; function convert(list) { let res = []; const map = {}; list.forEach(l => { map[l.id] = l; }) list.forEach(l => { if (!l.parentId) { res.push(l); } else { const parent = map[l.parentId]; if (parent.children) { parent.children.push(l); } else { parent.children = [l]; } } }) return res; } convert(list);

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