错误提示：
2022-01-25 23:10:56.182 ERROR 2716 — [nio-8080-exec-8] .[.[.[/].[dispatcherServlet] : () for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is : Error resolving template [back/treedata], template might not exist or might not be accessible by any of the configured Template Resolvers] with root cause
: Error resolving template [back/treedata], template might not exist or might not be accessible by any of the configured Template Resolvers
at (:869) ~[thymeleaf-3.0.:3.0.]
at (:607) ~[thymeleaf-3.0.:3.0.]
at (:1098) ~[thymeleaf-3.0.:3.0.]
at (:1072) ~[thymeleaf-3.0.:3.0.]
at .(:366) ~[thymeleaf-spring5-3.0.:3.0.]
at .(:190) ~[thymeleaf-spring5-3.0.:3.0.]
at (:1393) ~[spring-webmvc-5.3.:5.3.3]
at (:1138) ~[spring-webmvc-5.3.:5.3.3]
at (:1077) ~[spring-webmvc-5.3.:5.3.3]
at (:962) ~[spring-webmvc-5.3.:5.3.3]
at (:1006) ~[spring-webmvc-5.3.:5.3.3]
at (:898) ~[spring-webmvc-5.3.:5.3.3]
at (:626) ~[tomcat-embed-core-9.0.:4.]
at (:883) ~[spring-webmvc-5.3.:5.3.3]
at (:733) ~[tomcat-embed-core-9.0.:4.]
at (:231) ~[tomcat-embed-core-9.0.:9.0.41]
at (:166) ~[tomcat-embed-core-9.0.:9.0.41]
at (:53) ~[tomcat-embed-websocket-9.0.:9.0.41]
at (:193) ~[tomcat-embed-core-9.0.:9.0.41]
at (:166) ~[tomcat-embed-core-9.0.:9.0.41]
at (:100) ~[spring-web-5.3.:5.3.3]
at (:119) ~[spring-web-5.3.:5.3.3]
at (:193) ~[tomcat-embed-core-9.0.:9.0.41]
at (:166) ~[tomcat-embed-core-9.0.:9.0.41]
at (:93) ~[spring-web-5.3.:5.3.3]
at (:119) ~[spring-web-5.3.:5.3.3]
at (:193) ~[tomcat-embed-core-9.0.:9.0.41]
at (:166) ~[tomcat-embed-core-9.0.:9.0.41]
at (:201) ~[spring-web-5.3.:5.3.3]
at (:119) ~[spring-web-5.3.:5.3.3]
at (:193) ~[tomcat-embed-core-9.0.:9.0.41]
at (:166) ~[tomcat-embed-core-9.0.:9.0.41]
at (:202) ~[tomcat-embed-core-9.0.:9.0.41]
at (:97) [tomcat-embed-core-9.0.:9.0.41]
at (:542) [tomcat-embed-core-9.0.:9.0.41]
at (:143) [tomcat-embed-core-9.0.:9.0.41]
at (:92) [tomcat-embed-core-9.0.:9.0.41]
at (:78) [tomcat-embed-core-9.0.:9.0.41]
at (:343) [tomcat-embed-core-9.0.:9.0.41]
at .http11.(:374) [tomcat-embed-core-9.0.:9.0.41]
at (:65) [tomcat-embed-core-9.0.:9.0.41]
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(:888) [tomcat-embed-core-9.0.:9.0.41] at
ConnectionHandler.process(AbstractProtocol.java:888)[tomcat−embed−core−9.0.41.jar:9.0.41]atorg.apache.tomcat.util.net.NioEndpoint(:1597) [tomcat-embed-core-9.0.:9.0.41]
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Worker.run(ThreadPoolExecutor.java:624)[na:1.8.0201]atorg.apache.tomcat.util.threads.TaskThread(:61) [tomcat-embed-core-9.0.:9.0.41]
at (:748) [na:1.8.0_201]
错误原因
我是在一个layui的弹窗上面发起的ajax请求，因此返回给了当前的页面地址导致了跨页面（异步请求嘛返回了不同页面导致找不到页面的错误
@RequestMapping(/treedata")
public String cateManagetree(Model model){
QueryWrapper<Category> wrapper = new QueryWrapper<>();
wrapper.eq("parent_id",0);
List<Category> list = cateService.findByParent(wrapper);
model.addAttribute("cates",list);
return "/back/cate-manage_2";
}
解决办法
最终修改为
@RequestMapping("/treedata")
@ResponseBody
public List<Category> cateManagetree(){
QueryWrapper<Category> wrapper = new QueryWrapper<>();
wrapper.eq("parent_id",0);
List<Category> list = cateService.findByParent(wrapper);
return list;
}
附前端代码
<form class="layui-form" id="test" style="display: none">
<div class="layui-form-item">
<label class="layui-form-label">父ID</label>
<div class="layui-input-block">
<select name="parentId" lay-search id="parent">
<option value="0">请选择</option>
</select>
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">关键字</label>
<div class="layui-input-block">
<input type="text" name="cname" required lay-verify="required" placeholder="请输入关键字" autocomplete="on" class="layui-input" id="username" style="width:100px">
</div>
</div>
</form>
layui.use(['jquery', 'excel','form','layer','laydate'], function(){
var form = layui.form,
$ = layui.jquery
$.post("/back/treedata", function (data) {
$.each(data, function (index, item) {
jQuery("<option></option>").val(item.cid).text(item.cname).appendTo("#parent");
})
form.render("select");
})
})
function x_admin_show(){
layui.use(['jquery', 'excel','form','layer','laydate'], function() {
layer.open({
type: 1,
area: ['500px', '300px'],
title: '添加种类',
content: $('#test'),
shade: 0,
btn: ['提交']
, btn1: function (index, layero) {
$.post({
url: "/back/cateadd",
data: $("#test").serialize(),
success: function (data) {
if (data.code == 200)
alert("成功")
}
})
},
cancel: function (layero, index) {
layer.closeAll();
}
})
})
}