Freemarker 树形导航菜单（递归）
很多导航菜单是树形的，即一级一级往下细分，这样的结构固然需要用递归来处理。
对于Freemarker 来说，宏就相当于函数，其定义了签名及参数列表。
所以在页面应这样写：
<ul>
<#macro bpTree children>
<#if children?? && children?size gt 0>
<#list children as child>
<#if child.children?? && child.children?size gt 0>
<li class="treeview">
<a href="javascript:void(0)">
<i class="${(child.mIcon=='')?string('fa fa-share',child.mIcon) }" aria-hidden="true">i> <span>${child.mCname}span>
<i class="fa fa-angle-left pull-right" aria-hidden="true">i>
a>
<ul class="treeview-menu">
<@bpTree children=child.children />
ul>
li>
<#else>
<li><a href="javascript:void(0)" onclick="loadContent('${child.mUrl}')"><i class="${ (child.mIcon=='')?string('fa fa-circle-o',child.mIcon) }" aria-hidden="true">i> ${child.mCname}a>li>
#if>
#list>
#if>
#macro>
<@bpTree children=treeMenu />
ul>- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
treeMenu是Controller返回的JSON中的根元素，其值是JSONArray，所以最关键的核心问题是如何生成递归地数据结构。叶子节点的children为空数组。
Fremarker 宏 请参考博文：Freemarker定义宏的用法
后台Service查询数据库处理数据生成JSONArray的数据结构格式：
[
{
"mCname": "框架应用管理",
"mIcon": "fa fa-square-o",
"mAppid": 1,
"mIsclose": 0,
"mIssys": 1,
"mUrl": "",
"children": [
{
"mCname": "模块管理",
"mIcon": "fa fa-cube",
"mAppid": 1,
"mIsclose": 0,
"mIssys": 1,
"mUrl": "AppMgr/ModuleManager/default.aspx",
"children": [],
"mOrderlevel": "0001",
"mParentName": "框架应用管理",
"mParentid": 1,
"moduleid": 2,
"mModulecode": "S00M00",
"aAppName": "框架应用管理"
},
{
"mCname": "配置管理",
"mIcon": "fa fa-cog",
"mAppid": 1,
"mIsclose": 0,
"mIssys": 1,
"mUrl": "AppMgr/ConfigManager/default.aspx",
"children": [],
"mOrderlevel": "0002",
"mParentName": "框架应用管理",
"mParentid": 1,
"moduleid": 3,
"mModulecode": "S00M01",
"aAppName": "框架应用管理"
},
{
"mCname": "应用字段设置",
"mIcon": "fa fa-key",
"mAppid": 1,
"mIsclose": 0,
"mIssys": 1,
"mUrl": "AppMgr/FieldManager/default.aspx",
"children": [],
"mOrderlevel": "0003",
"mParentName": "框架应用管理",
"mParentid": 1,
"moduleid": 4,
"mModulecode": "S00M02",
"aAppName": "框架应用管理"
},
{
"mCname": "系统异常日志",
"mIcon": "fa fa-file-pdf-o",
"mAppid": 1,
"mIsclose": 0,
"mIssys": 1,
"mUrl": "AppMgr/SystemErrorLog/default.aspx",
"children": [],
"mOrderlevel": "0004",
"mParentName": "框架应用管理",
"mParentid": 1,
"moduleid": 5,
"mModulecode": "S00M03",
"aAppName": "框架应用管理"
},
{
"mCname": "事件日志",
"mIcon": "fa fa-file-zip-o",
"mAppid": 1,
"mIsclose": 0,
"mIssys": 1,
"mUrl": "AppMgr/EventLog/default.aspx",
"children": [],
"mOrderlevel": "0005",
"mParentName": "框架应用管理",
"mParentid": 1,
"moduleid": 6,
"mModulecode": "S00M04",
"aAppName": "框架应用管理"
}
],
"mOrderlevel": "0000",
"mParentid": 0,
"moduleid": 1,
"mModulecode": "S00",
"aAppName": "框架应用管理"
},
{
"mCname": "系统管理",
"mIcon": "fa fa-cogs",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "",
"children": [
{
"mCname": "行政区管理",
"mIcon": "fa fa-circle",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/AreaManager/default.aspx",
"children": [],
"mOrderlevel": "0001",
"mParentName": "系统管理",
"mParentid": 7,
"moduleid": 8,
"mModulecode": "S10M01",
"aAppName": "应用系统管理"
},
{
"mCname": "组织机构管理",
"mIcon": "fa fa-tree",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/CompanyManager/default.aspx",
"children": [],
"mOrderlevel": "0002",
"mParentName": "系统管理",
"mParentid": 7,
"moduleid": 9,
"mModulecode": "S10M02",
"aAppName": "应用系统管理"
},
{
"mCname": "角色权限管理",
"mIcon": "fa fa-user-secret",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/RoleManager/default.aspx",
"children": [],
"mOrderlevel": "0003",
"mParentName": "系统管理",
"mParentid": 7,
"moduleid": 10,
"mModulecode": "S10M03",
"aAppName": "应用系统管理"
},
{
"mCname": "用户管理",
"mIcon": "fa fa-users",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/UserManager/default.aspx",
"children": [],
"mOrderlevel": "0004",
"mParentName": "系统管理",
"mParentid": 7,
"moduleid": 11,
"mModulecode": "S10M04",
"aAppName": "应用系统管理"
},
{
"mCname": "数据字典",
"mIcon": "fa fa-leaf",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/FieldValueManager/default.aspx",
"children": [],
"mOrderlevel": "0005",
"mParentName": "系统管理",
"mParentid": 7,
"moduleid": 12,
"mModulecode": "S10M05",
"aAppName": "应用系统管理"
},
{
"mCname": "在线用户列表",
"mIcon": "fa fa-user",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/OnlineUser/default.aspx",
"children": [],
"mOrderlevel": "0009",
"mParentName": "系统管理",
"mParentid": 7,
"moduleid": 16,
"mModulecode": "S10M09",
"aAppName": "应用系统管理"
},
{
"mCname": "系统设置",
"mIcon": "fa fa-cog",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "",
"children": [
{
"mCname": "事件日志查询",
"mIcon": "fa fa-search-minus",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/EventManager/default.aspx",
"children": [],
"mOrderlevel": "0006",
"mParentName": "系统设置",
"mParentid": 43,
"moduleid": 13,
"mModulecode": "S10M06",
"aAppName": "应用系统管理"
},
{
"mCname": "系统参数管理",
"mIcon": "fa fa-square",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/SystemParam/default.aspx",
"children": [],
"mOrderlevel": "0007",
"mParentName": "系统设置",
"mParentid": 43,
"moduleid": 14,
"mModulecode": "S10M07",
"aAppName": "应用系统管理"
},
{
"mCname": "系统维护",
"mIcon": "fa fa-shield",
"mAppid": 2,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "SysMgr/SystemState/default.aspx",
"children": [],
"mOrderlevel": "0008",
"mParentName": "系统设置",
"mParentid": 43,
"moduleid": 15,
"mModulecode": "S10M08",
"aAppName": "应用系统管理"
}
],
"mOrderlevel": "0010",
"mParentName": "系统管理",
"mParentid": 7,
"moduleid": 43,
"mModulecode": "S10M10",
"aAppName": "应用系统管理"
}
],
"mOrderlevel": "0000",
"mParentid": 0,
"moduleid": 7,
"mModulecode": "S10",
"aAppName": "应用系统管理"
},
{
"mCname": "查询&报表统计",
"mIcon": "",
"mAppid": 3,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "",
"children": [
{
"mCname": "快递单查询",
"mIcon": "",
"mAppid": 3,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "ExpressMgr/ExpDocQuery/default.aspx",
"children": [],
"mOrderlevel": "0501",
"mParentName": "查询&报表统计",
"mParentid": 22,
"moduleid": 35,
"mModulecode": "S36M01",
"aAppName": "物流快递管理系统"
},
{
"mCname": "快递营收统计",
"mIcon": "",
"mAppid": 3,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "ExpressMgr/ExpIncomeStat/default.aspx",
"children": [],
"mOrderlevel": "0502",
"mParentName": "查询&报表统计",
"mParentid": 22,
"moduleid": 36,
"mModulecode": "S36M02",
"aAppName": "物流快递管理系统"
},
{
"mCname": "快递业务流量分析",
"mIcon": "",
"mAppid": 3,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "ExpressMgr/ExpDataAnalysis/default.aspx",
"children": [],
"mOrderlevel": "0503",
"mParentName": "查询&报表统计",
"mParentid": 22,
"moduleid": 37,
"mModulecode": "S36M03",
"aAppName": "物流快递管理系统"
},
{
"mCname": "快递业务报表",
"mIcon": "",
"mAppid": 3,
"mIsclose": 0,
"mIssys": 0,
"mUrl": "ExpressMgr/ExpCustomRpt/default.aspx",
"children": [],
"mOrderlevel": "0504",
"mParentName": "查询&报表统计",
"mParentid": 22,
"moduleid": 38,
"mModulecode": "S36M04",
"aAppName": "物流快递管理系统"
}
],
"mOrderlevel": "0500",
"mParentid": 0,
"moduleid": 22,
"mModulecode": "S36",
"aAppName": "物流快递管理系统"
}
]- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
- 104
- 105
- 106
- 107
- 108
- 109
- 110
- 111
- 112
- 113
- 114
- 115
- 116
- 117
- 118
- 119
- 120
- 121
- 122
- 123
- 124
- 125
- 126
- 127
- 128
- 129
- 130
- 131
- 132
- 133
- 134
- 135
- 136
- 137
- 138
- 139
- 140
- 141
- 142
- 143
- 144
- 145
- 146
- 147
- 148
- 149
- 150
- 151
- 152
- 153
- 154
- 155
- 156
- 157
- 158
- 159
- 160
- 161
- 162
- 163
- 164
- 165
- 166
- 167
- 168
- 169
- 170
- 171
- 172
- 173
- 174
- 175
- 176
- 177
- 178
- 179
- 180
- 181
- 182
- 183
- 184
- 185
- 186
- 187
- 188
- 189
- 190
- 191
- 192
- 193
- 194
- 195
- 196
- 197
- 198
- 199
- 200
- 201
- 202
- 203
- 204
- 205
- 206
- 207
- 208
- 209
- 210
- 211
- 212
- 213
- 214
- 215
- 216
- 217
- 218
- 219
- 220
- 221
- 222
- 223
- 224
- 225
- 226
- 227
- 228
- 229
- 230
- 231
- 232
- 233
- 234
- 235
- 236
- 237
- 238
- 239
- 240
- 241
- 242
- 243
- 244
- 245
- 246
- 247
- 248
- 249
- 250
- 251
- 252
- 253
- 254
- 255
- 256
- 257
- 258
- 259
- 260
- 261
- 262
- 263
- 264
- 265
- 266
- 267
- 268
- 269
- 270
- 271
- 272
- 273
- 274
- 275
- 276
- 277
- 278
- 279
- 280
- 281
- 282
- 283
- 284
- 285
- 286
- 287
- 288
- 289
- 290
- 291
- 292
- 293
- 294
- 295
- 296
- 297
- 298
- 299
- 300
- 301
- 302
- 303
- 304
- 305
- 306
- 307
- 308
- 309
- 310
- 311
- 312
- 313
- 314
- 315
- 316
- 317
- 318
- 319
- 320
- 321
- 322
- 323
- 324
- 325
- 326
- 327
- 328
- 329
- 330
- 331
- 332
- 333
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
- 104
- 105
- 106
- 107
- 108
- 109
- 110
- 111
- 112
- 113
- 114
- 115
- 116
- 117
- 118
- 119
- 120
- 121
- 122
- 123
- 124
- 125
- 126
- 127
- 128
- 129
- 130
- 131
- 132
- 133
- 134
- 135
- 136
- 137
- 138
- 139
- 140
- 141
- 142
- 143
- 144
- 145
- 146
- 147
- 148
- 149
- 150
- 151
- 152
- 153
- 154
- 155
- 156
- 157
- 158
- 159
- 160
- 161
- 162
- 163
- 164
- 165
- 166
- 167
- 168
- 169
- 170
- 171
- 172
- 173
- 174
- 175
- 176
- 177
- 178
- 179
- 180
- 181
- 182
- 183
- 184
- 185
- 186
- 187
- 188
- 189
- 190
- 191
- 192
- 193
- 194
- 195
- 196
- 197
- 198
- 199
- 200
- 201
- 202
- 203
- 204
- 205
- 206
- 207
- 208
- 209
- 210
- 211
- 212
- 213
- 214
- 215
- 216
- 217
- 218
- 219
- 220
- 221
- 222
- 223
- 224
- 225
- 226
- 227
- 228
- 229
- 230
- 231
- 232
- 233
- 234
- 235
- 236
- 237
- 238
- 239
- 240
- 241
- 242
- 243
- 244
- 245
- 246
- 247
- 248
- 249
- 250
- 251
- 252
- 253
- 254
- 255
- 256
- 257
- 258
- 259
- 260
- 261
- 262
- 263
- 264
- 265
- 266
- 267
- 268
- 269
- 270
- 271
- 272
- 273
- 274
- 275
- 276
- 277
- 278
- 279
- 280
- 281
- 282
- 283
- 284
- 285
- 286
- 287
- 288
- 289
- 290
- 291
- 292
- 293
- 294
- 295
- 296
- 297
- 298
- 299
- 300
- 301
- 302
- 303
- 304
- 305
- 306
- 307
- 308
- 309
- 310
- 311
- 312
- 313
- 314
- 315
- 316
- 317
- 318
- 319
- 320
- 321
- 322
- 323
- 324
- 325
- 326
- 327
- 328
- 329
- 330
- 331
- 332
- 333
要生成如上所示的JSONArray，其Service层也需要用递归来处理数据，Service层的写法，
// 返回json格式的树形导航菜单
public JSONArray getTreeMenu() {
return treeMenuList(getModules(), 0);
}
// 菜单树形结构
public JSONArray treeMenuList(List menuList, int parentId) {
JSONArray childMenu = new JSONArray();
for (FrmModule menu : menuList) {
if (parentId == menu.getmParentid()) {
JSONObject jo = (JSONObject) JSONObject.toJSON(menu);
JSONArray c_node = treeMenuList(menuList, menu.getModuleid());
jo.put("children", c_node);
childMenu.add(jo);
}
}
return childMenu;
} - 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
然后在Controller层调用Service层生成的JSONArray，封装返回的JSON数据：
@RequestMapping(value = "/", method = RequestMethod.GET)
public String home(Model model) {
JSONArray ja = moduleService.getTreeMenu();
System.out.println(ja.toJSONString());
model.addAttribute("treeMenu",ja );
return "index";
}- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 1
- 2
- 3
- 4
- 5
- 6
- 7
最后生成的树形菜单如下所示：
