Question

我正在从数据库中检索要作为自动完成列表显示在前端的地址列表。当我在搜索字段中键入字母时，它显示为空字段。虽然我可以在控制台上打印json数据。如果有一些代码片段，那就太好了。

这是我的控制人

package com.searching.controller;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.google.gson.Gson;
import com.searching.model.Address;
import com.searching.service.SearchService;

@Controller
public class SearchingController {

    @Autowired SearchService searchService;

    @RequestMapping(value="/",method=RequestMethod.GET)
    public String searchPage() {
        //runthismethod();
        return "testpage";
    }


    @GetMapping("/addressAutocomplete")
    @ResponseBody
    public String getSearchdata(@RequestParam(value="term",defaultValue="",required=false) String term) {
        List<Address> address=searchService.fetchAddress();
        Gson json=new Gson();

        String response=json.toJson(address);

        System.out.println(response);
        return response;
    }
}

前端

<!doctype html>
<html lang = "en">
   <head>
      <meta charset = "utf-8">
      <title>jQuery UI Autocomplete functionality</title>
      <link href = "https://code.jquery.com/ui/1.10.4/themes/ui-lightness/jquery-ui.css"
         rel = "stylesheet">
      <script src = "https://code.jquery.com/jquery-1.10.2.js"></script>
      <script src = "https://code.jquery.com/ui/1.10.4/jquery-ui.js"></script>

      <!-- Javascript -->
      <script>
         $(function() {
            $( "#automplete-1" ).autocomplete({
                source: "/addressAutocomplete",
                 autoFocus:true,
                minLength: 2,
            });
         });
      </script>
   </head>

   <body>
      <!-- HTML --> 
      <div class = "ui-widget">
         <p>Type "a" or "s"</p>
         <label for = "automplete-1">Tags: </label>
         <input id = "automplete-1">
      </div>
   </body>
</html>

控制台上的json数据

Answer 1

只需对控制器进行如下更改，

    @GetMapping("/addressAutocomplete")
    @ResponseBody
    public List<Address> getSearchdata(@RequestParam(value="term",defaultValue="",required=false) String term) {
        return searchService.fetchAddress();
    }

Spring将返回的数据转换为JSON。

当我将json数据返回到前端时，它显示为空列表

1 个答案: