java - spring 4.3.7 和 weblogic 12.2.1 Rest 集成有错误

Question

我有一个 Restful Spring Web 应用程序，我想将其部署在 weblogic 中。在 tomcat 中部署它工作正常，但在 weblogic 中我收到此错误:

Root cause of ServletException.
java.lang.NoSuchMethodError:   com.fasterxml.jackson.databind.ObjectWriter.forType(Lcom/fasterxml/jackson /databind/JavaType;)Lcom/fasterxml/jackson/databind/ObjectWriter;
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:278)
at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:100)
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:231)
at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:203)
at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81)
Truncated. see log file for complete stacktrace

我尝试了不同的 Jackson lib 版本:2.6 2.7 2.7.6 2.8 2.8.7 2.8.8 和 2.9 但有相同的错误。我的 Controller 类: 包 com.rest.springmvc.controller;

import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
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;
import org.springframework.web.util.UriComponentsBuilder;

import com.rest.springmvc.model.User;
import com.rest.springmvc.service.UserService;

@RestController
public class RestController {

@Autowired
UserService userService;  //Service which will do all data retrieval/manipulation work


//-------------------Retrieve All Users--------------------------------------------------------

@RequestMapping(value = "/user/", method = RequestMethod.GET)
public ResponseEntity<List<User>> listAllUsers() {
    List<User> users = userService.findAllUsers();
    if(users.isEmpty()){
        return new ResponseEntity<List<User>>(HttpStatus.NO_CONTENT);//You many decide to return HttpStatus.NOT_FOUND
    }
    return new ResponseEntity<List<User>>(users, HttpStatus.OK);
}
//-------------------Retrieve Single User--------------------------------------------------------

@RequestMapping(value = "/user/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<User> getUser(@PathVariable("id") long id) {
    System.out.println("Fetching User with id " + id);
    User user = userService.findById(id);
    if (user == null) {
        System.out.println("User with id " + id + " not found");
        return new ResponseEntity<User>(HttpStatus.NOT_FOUND);
    }
    return new ResponseEntity<User>(user, HttpStatus.OK);
}



//-------------------Create a User--------------------------------------------------------

@RequestMapping(value = "/user/", method = RequestMethod.POST)
public ResponseEntity<Void> createUser(@RequestBody User user,  UriComponentsBuilder ucBuilder) {
    System.out.println("Creating User " + user.getName());

    if (userService.isUserExist(user)) {
        System.out.println("A User with name " + user.getName() + " already exist");
        return new ResponseEntity<Void>(HttpStatus.CONFLICT);
    }

    userService.saveUser(user);

    HttpHeaders headers = new HttpHeaders();
    headers.setLocation(ucBuilder.path("/user/{id}").buildAndExpand(user.getId()).toUri());
    return new ResponseEntity<Void>(headers, HttpStatus.CREATED);
}


//------------------- Update a User --------------------------------------------------------

@RequestMapping(value = "/user/{id}", method = RequestMethod.PUT)
public ResponseEntity<User> updateUser(@PathVariable("id") long id, @RequestBody User user) {
    System.out.println("Updating User " + id);

    User currentUser = userService.findById(id);

    if (currentUser==null) {
        System.out.println("User with id " + id + " not found");
        return new ResponseEntity<User>(HttpStatus.NOT_FOUND);
    }

    currentUser.setName(user.getName());
    currentUser.setAge(user.getAge());
    currentUser.setSalary(user.getSalary());

    userService.updateUser(currentUser);
    return new ResponseEntity<User>(currentUser, HttpStatus.OK);
}

//------------------- Delete a User --------------------------------------------------------

@RequestMapping(value = "/user/{id}", method = RequestMethod.DELETE)
public ResponseEntity<User> deleteUser(@PathVariable("id") long id) {
    System.out.println("Fetching & Deleting User with id " + id);

    User user = userService.findById(id);
    if (user == null) {
        System.out.println("Unable to delete. User with id " + id + " not found");
        return new ResponseEntity<User>(HttpStatus.NOT_FOUND);
    }

    userService.deleteUserById(id);
    return new ResponseEntity<User>(HttpStatus.NO_CONTENT);
}


//------------------- Delete All User --------------------------------------------------------

@RequestMapping(value = "/user/", method = RequestMethod.DELETE)
public ResponseEntity<User> deleteAllUsers() {
    System.out.println("Deleting All Users");

    userService.deleteAllUsers();
    return new ResponseEntity<User>(HttpStatus.NO_CONTENT);
}

}

应用程序成功部署，但是当我发布 http://localhost:7001/user/ 时我在 weblogic 中遇到了这个错误。

Answer 1

NoSuchMethodError 表示该类不再具有该方法的定义。这可能是由于 Weblogic 调用的库版本与应用程序的预期版本不同。

找到 jar :

1. 临时向服务器的 JVM 添加 -verbose:class 参数论据。
2. 在服务器的输出文件中，您将能够看到*.jar正在加载。

如果 jar 版本与您期望的版本不同，您可以考虑将应用程序升级到较新版本的库。如果这是不可能的，可以使用此 parameter 来解决这个问题。 .