无法从 spring-web 创建 RestTemplate() 实例

Question

我正在使用 tomcat web application 和 rest webservice 当我插入数据时出现异常！

我的班级客户代理：

package com.rayanen.java.se.cmsd.proxy;

import com.rayanen.java.se.cmsd.dto.CustomerDTO;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;

import javax.faces.context.FacesContext;

@Component
public class CustomerProxy implements ICustomerProxy{



    @Override
    public void insertCustomer(CustomerDTO customerDTO) {
        RestTemplate restTemplate = new RestTemplate();

        HttpHeaders requestHeaders = new HttpHeaders();

        String headerValue = FacesContext.getCurrentInstance().getExternalContext().getRequestHeaderMap().get("cookie");
        requestHeaders.add("Cookie", headerValue);

        HttpEntity requestEntity = new HttpEntity(customerDTO, requestHeaders);
        ResponseEntity response = restTemplate.exchange(
                "http://localhost:8080/ws/customer/insert",
                HttpMethod.POST,
                requestEntity,
                CustomerDTO.class);
        /*return response.getBody();*/
    }
}

类 CustomerRestController ：

package com.rayanen.java.se.cmsd.ws;

import com.rayanen.java.se.cmsd.dto.CustomerDTO;
import com.rayanen.java.se.cmsd.exceptions.*;
import com.rayanen.java.se.cmsd.facade.facadeimpl.CustomerFacade;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "/customer")
public class CustomerRestController {
    @Autowired
    private CustomerFacade customerFacade;

    @RequestMapping(method = RequestMethod.POST, value = "/insert")
    ResponseEntity insert(@RequestBody CustomerDTO customerDTO){
        try {
            customerFacade.save(customerDTO);
        } catch (StoreFailedException e) {
            e.printStackTrace();
        } catch (CustomerIDDuplicateException e) {
            e.printStackTrace();
        } catch (EmailNotValidException e) {
            e.printStackTrace();
        } catch (CustomerIDNotValidExeption customerIDNotValidExeption) {
            customerIDNotValidExeption.printStackTrace();
        } catch (LastNameNotValidException e) {
            e.printStackTrace();
        } catch (NameNotValidException e) {
            e.printStackTrace();
        }
        return new ResponseEntity(HttpStatus.OK);
    }

}

类 CustomerBean：

package com.rayanen.java.se.cmsd.webui;

import com.rayanen.java.se.cmsd.dto.CustomerDTO;
import com.rayanen.java.se.cmsd.exceptions.*;
import com.rayanen.java.se.cmsd.facade.facadeimpl.CustomerFacade;
import com.rayanen.java.se.cmsd.proxy.ICustomerProxy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import java.io.Serializable;

@Component
@Scope("view")
public class CustomerBean implements Serializable{


    private CustomerDTO customerDTO = new CustomerDTO();
    private String lable;

    @Autowired
    private CustomerFacade customerFacade;

    @Autowired
    private ICustomerProxy iCustomerProxy;

    public String getLable() {
        return lable;
    }

    public void setLable(String lable) {
        this.lable = lable;
    }

    public CustomerDTO getCustomerDTO() {
        return customerDTO;
    }

    public void setCustomerDTO(CustomerDTO customerDTO) {
        this.customerDTO = customerDTO;
    }

    public void insert(ActionEvent actionEvent){
        lable = customerDTO.getName() + "; " + customerDTO.getLastName();
        iCustomerProxy.insertCustomer(customerDTO);
        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Added Successfully", ""));

    }



}

插入数据后我调试并找出异常的例外是：

RestTemplate restTemplate = new RestTemplate();

2017 年 11 月 20 日 23:06:04.211 警告 [http-nio-8080-exec-5] com.sun.faces.lifecycle.InvokeApplicationPhase.execute /customer/insert.xhtml @43,134 actionListener="#{customerBean.insert}": java.lang.NoClassDefFoundError： org/springframework/core/KotlinDetector javax.el.E​​LException： /customer/insert.xhtml @43,134 actionListener="#{customerBean.insert}": java.lang.NoClassDefFoundError： org/springframework/core/KotlinDetector 在 com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:111) 在 javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:147) 在 javax.faces.event.ActionEvent.processListener(ActionEvent.java:88) 在 javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:813) 在 javax.faces.component.UICommand.broadcast(UICommand.java:300) 在 javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) 在 javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) 在 com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) 在 com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 在 com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) 在 javax.faces.webapp.FacesServlet.service(FacesServlet.java:646) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 在 org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 在 com.rayanen.java.se.cmsd.webui.LoginFilter.doFilter(LoginFilter.java:30) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:217） 在 org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) 在 org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 在 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) 在 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 在 org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) 在 org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:518） 在 org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) 在 org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673) 在 org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 在 org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 在 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 在 org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 在 java.lang.Thread.run(Thread.java:748) 引起： java.lang.NoClassDefFoundError： org/springframework/core/KotlinDetector 在 org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.registerWellKnownModulesIfAvailable(Jackson2ObjectMapperBuilder.java:766) 在 org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.configure(Jackson2ObjectMapperBuilder.java:619) 在 org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.build(Jackson2ObjectMapperBuilder.java:602) 在 org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.(MappingJackson2HttpMessageConverter.java:59) 在 org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.(AllEncompassingFormHttpMessageConverter.java:67) 在 org.springframework.web.client.RestTemplate.(RestTemplate.java:171) 在 com.rayanen.java.se.cmsd.proxy.CustomerProxy.insertCustomer(CustomerProxy.java:22) 在 com.rayanen.java.se.cmsd.webui.CustomerBean.insert(CustomerBean.java:48) 在 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 在 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 在 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 在 java.lang.reflect.Method.invoke(Method.java:498) 在 org.apache.el.parser.AstValue.invoke(AstValue.java:247) 在 org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267) 在 com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) ... 34 更多原因：java.lang.ClassNotFoundException： org.springframework.core.KotlinDetector 在 org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333) 在 org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167) ... 49 更多

任何帮助将不胜感激。

Answer 1

是的，正如@Kayaman 在 cmets 中指出的那样，添加 spring 核心依赖应该可以解决它。

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>5.0.2.RELEASE</version>
    </dependency>

Answer 2

问题出在我的其他依赖版本上 我更改了它们并解决了问题