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無法處理請求[GET http:// localhost:8080]:響應狀態404 Spring,RESTfull,thymleaf

[英]Failed to handle request [GET http://localhost:8080 ]: Response status 404 Spring, RESTfull ,thymleaf

我遇到了Spring,Rest和Thymeleafand的問題,我被困在那里,有關此錯誤的詳細信息很少。

我希望當我以select標記(index.html)中的選項之一的形式選擇重定向到something.html,但是具有新值(帶有api調用),而我得到的只是它可以處理請求。

我想從HTML表單將值發送到服務和控制器:

index.html:

<body>
<!--/*@thymesVar id="cryptos" type="java.util.Map<Integer, jasmin.merusic.domain.Crypto>"*/-->
<!--/*@thymesVar id="crypto" type="jasmin.merusic.domain.Crypto"*/-->
<div class="container-fluid" style="margin-top: 20px">
<div class="row">
    <div class="col-md-6 col-md-offset-3">
        <div class="panel panel-primary">

            <div class="panel-heading">
                <h1 class="panel-title">CryptoCurrencies from API</h1>
            </div>
            <div class="panel-body">
                <div class="table-responsive" th:if="${not #maps.isEmpty(cryptos)}">
                    <table class="table table-hover ">
                        <thead class="thead-inverse">
                        <tr>
                            <th>Name</th>
                            <th>
                               **<form th:action="@{/values/}" >
                                <select name="fiatCurrency" onchange="this.form.submit()">
                                <option  selected="selected" value="USD">USD</option>
                                <option  value="EUR">Euro</option>
                                <option  value="CNY">C. Yuan</option>
                                </select>
                               </form>**
                            </th>
                            <th>Change in 24h(%)</th>
                            <th>Rank</th>
                            <th>Symbol</th>
                        </tr>
                        </thead>
                        <tr th:remove="all">
                            <td>Joe</td>
                            <td>Buck</td>
                            <td>Male</td>
                            <td>foo@example.com</td>
                        </tr>
                        <tr th:remove="all">
                            <td>Joe</td>
                            <td>Buck</td>
                            <td>Male</td>
                            <td>foo@example.com</td>
                        </tr>

                        <tr th:each="crypto : ${cryptos.values()}">
                            <td th:text="${crypto.name}">Joe</td>
                                <span th:each="cryp : ${crypto.quotes.values()}">
                                    <td th:text="${cryp.price}">Buck</td>
                                    <td th:text="${cryp.percent_change_24h}">Buck</td>
                                </span>
                            <td th:text="${crypto.rank}">Male</td>
                            <td th:text="${crypto.symbol}">foo@example.com</td>
                        </tr>
                    </table>
                </div>
            </div>
        </div>
    </div>
   </div>
</div>
</body>

控制器類是這樣的:

@Controller
public class DataController {

 private  ApiService apiService;

public DataController(ApiService apiService) {
    this.apiService = apiService;
}

@GetMapping({"", "/", "/index","/cryptos"})
public String index(Model model){

    model.addAttribute("cryptos",apiService.getCrypto(100));

    return "index";
}

@PostMapping(value = "/values/{fiatCurrency}")
public String choseCurrency(Model model,@PathVariable String fiatCurrency){

    model.addAttribute("cryp",apiService.getInDifferentValues(fiatCurrency));

     //returns to the something.html
    return "something";
}
}

服務實現如下所示:

@Service
public class ApiServiceImpl implements ApiService{

private  RestTemplate restTemplate;

@Autowired
public ApiServiceImpl(RestTemplate restTemplate) {
    this.restTemplate = restTemplate;
}

@Override
public Map<Integer,Crypto> getCrypto(Integer limit) {

    CryptoData cryptoData = restTemplate.getForObject("https://api.coinmarketcap.com/v2/ticker/?convert=BTC&limit=" + limit , CryptoData.class);


    return cryptoData.getData();
}

@Override
public Map<Integer, Crypto> getInDifferentValues(String fiatCurrency) {

    CryptoData cryptoData = restTemplate.
            getForObject("https://api.coinmarketcap.com/v2/ticker/?convert=" + fiatCurrency + "&limit=100", CryptoData.class);

    return cryptoData.getData();
}
}

我是新手,遇到以下錯誤:

2018-10-19 20:10:40.147  WARN 15768 --- [ctor-http-nio-4] .a.w.r.e.DefaultErrorWebExceptionHandler : Failed to handle request [GET http://localhost:8080/values/?fiatCurrency=EUR]: Response status 404

根據您的錯誤堆棧跟蹤,

2018-10-19 20:10:40.147 WARN 15768 --- [ctor-http-nio-4] .awreDefaultErrorWebExceptionHandler:無法處理請求[GET http:// localhost:8080 / values /?fiatCurrency = EUR] :響應狀態404

您尚未為/values定義GET映射。 您僅為POST操作定義了它,請添加它,它應該可以工作。

嘗試更改此行

**<form th:action="@{/values/}" >

**<form th:action="@{/values/} + ${fiatCurrency}" method="post" >

這會將請求從“獲取”更改為“發布”(您現在在表單中具有“獲取”),並將信息作為pathvariable(在控制器方法中定義)發送,而不作為請求參數發送(如現在) )。

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