我想反序列化來自Nutritionix API的JSON響應。當我嘗試反序列化對象時，我一直得到HTTP狀態500 - 請求處理失敗;嵌套異常是java.lang.ClassCastException：java.lang.String不能轉換爲java.util.Map錯誤。我非常困惑，不知道爲什麼這會導致事件發生，因爲看起來我得到了有效的JSON響應，但我不確定。反序列化問題
public class CallSearch {
String value;
public CallSearch(String search){
value = search.replace(" ", "%20");
}
public FullResponse search() throws ClientProtocolException, IOException{
CloseableHttpClient client = HttpClients.createDefault();
HttpGet getProducts = new HttpGet("https://api.nutritionix.com/v1_1/search/"+ value +"?results=0%3A6&cal_min=0&cal_max=50000&fields=item_name%2Citem_id&appId=ac23ceb3&appKey=e2b579c55b4857157fc6045d6296b532");
CloseableHttpResponse productResponse = client.execute(getProducts);
String entityString = EntityUtils.toString(productResponse.getEntity());
FullResponse test = new JSONDeserializer<FullResponse>().deserialize(entityString,FullResponse.class);
return test;
}
}
我創建了反序列化到類如下
public class FullResponse {
String total_hits;
String max_score;
List<Hits> hits;
public FullResponse(){
}
public String getTotal_hits() {
return total_hits;
}
public void setTotal_hits(String total_hits) {
this.total_hits = total_hits;
}
public String getMax_score() {
return max_score;
}
public void setMax_score(String max_score) {
this.max_score = max_score;
}
public List<Hits> getHits() {
return hits;
}
public void setHits(List<Hits> hits) {
this.hits = hits;
}
命中類，它是完整的響應
public class Hits {
String _index;
String _type;
String _id;
String _score;
List<Fields> fields;
public Hits(){
}
public String get_index() {
return _index;
}
public void set_index(String _index) {
this._index = _index;
}
public String get_type() {
return _type;
}
public void set_type(String _type) {
this._type = _type;
}
public String get_id() {
return _id;
}
public void set_id(String _id) {
this._id = _id;
}
public String get_score() {
return _score;
}
public void set_score(String _score) {
this._score = _score;
}
public List<Fields> getFields() {
return fields;
}
public void setFields(List<Fields> fields) {
this.fields = fields;
}
}
最後字段類中的一個列表：
public class Fields {
String item_name;
public Fields(){
}
public String getField(){
return item_name;
}
public void setField(String name){
item_name=name;
}
}
任何幫助我可能會出錯的地方將非常感激。由於
好吧，我所做的變化，這裏是JSON響應我得到
{ "total_hits":11025, "max_score":11.122117, "hits":[{ "_index":"nixproductionv13", "_type":"item", "_id":"513fceb375b8dbbc210000e4", "_score":11.122117, "fields":{"item_name":"Whole Milk - 1 tbsp"}}, {"_index":"nixproductionv13", "_type":"item", "_id":"513fceb375b8dbbc2100017b", "_score":10.7038355, "fields":{"item_name":"2% Milk - 1 cup"}}, {"_index":"nixproductionv13", "_type":"item", "_id":"513fceb375b8dbbc210000f3", "_score":10.7038355, "fields":{"item_name":"1% Milk - 1 cup"}}, {"_index":"nixproductionv13", "_type":"item", "_id":"513fceb375b8dbbc210000fb", "_score":10.689078, "fields":{"item_name":"Skim Milk - 1 cup"}}, {"_index":"nixproductionv13", "_type":"item", "_id":"513fceb375b8dbbc210000e3", "_score":10.65872, "fields":{"item_name":"Whole Milk - 1 fl oz"}}, {"_index":"nixproductionv13", "_type":"item", "_id":"513fceb375b8dbbc2100017a", "_score":10.392, "fields":{"item_name":"2% Milk - 1 quart"}}]}
它現在導致一個嵌套的例外是java.lang.IllegalArgumentException異常：參數類型不匹配
org.springframework.web.util.NestedServletException：請求 處理失敗;嵌套異常是 java.lang.IllegalArgumentException：參數類型不匹配 org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:894） org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:778 ） javax.servlet.http.HttpServlet.service（HttpServlet.java:621） javax.servlet.http.HttpServlet.service（HttpServlet.java:728） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（ FilterChainProxy.java:330） org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke（FilterSecurityInterceptor.java:118） org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter（FilterSecurityInterceptor.java： 84） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） org.springframework.security.web.access.ExceptionTranslationFilter.doFilter（ExceptionTranslationFilter.java:113） org.springframework.security.web .FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） org.springframework.security.web.session.SessionManagementFilter.doFilter（SessionManagementFilter.java:103） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（的FilterChainProxy的.java：342） org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter（AnonymousAuthenticationFilter.java:113） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter（SecurityContextHolderAwareRequestFilter.java:54） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） org.springframework.security.web .savedrequest.RequestCacheAwareFilter.doFilter（RequestCacheAwareFilter.java:45） org.springframework.security.web。的FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter（BasicAuthenticationFilter.java:150） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（ FilterChainProxy.java:342） org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter（AbstractAuthenticationProcessingFilter.java:183） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） 組織.springframework.security.web.authentication.logout.LogoutFilter.doFilter（LogoutFilter.java:105） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） org.springfram ework.security.web.context.SecurityContextPersistenceFilter.doFilter（SecurityContextPersistenceFilter.java:87） org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342） org.springframework.security.web.FilterChainProxy。 doFilterInternal（FilterChainProxy.java:192） org.springframework.security.web.FilterChainProxy.doFilter（FilterChainProxy.java:160） org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate（DelegatingFilterProxy.java:346） org.springframework .web.filter.DelegatingFilterProxy.doFilter（DelegatingFilterProxy.java:259）
發佈異常的完整堆棧跟蹤和JSON字符串。 –
做一個'System.out.println（entityString）'併發布它打印的內容。 –
你有不同的例外嗎？發佈它，如果你這樣做。 –