如何求解Maven编译错误:不存在软件包X

Question

我有3个Maven项目：

project-A
project-B
project-C

第二个项目（b）需要第一个项目（a）的依赖性。第三个项目（C）需要第一个和第二个项目（a，b）的依赖项。我已经在各个项目pom文件中定义了这些依赖项： project-B pom.xml：

    <dependency>
        <groupId>com.mygroupid</groupId>
        <artifactId>project-A</artifactId>
        <version>${project.version}</version>
    </dependency>

project-C pom.xml：

    <dependency>
        <groupId>com.mygroupid</groupId>
        <artifactId>project-A</artifactId>
        <version>${project.version}</version>
    </dependency>
    <dependency>
        <groupId>com.mygroupid</groupId>
        <artifactId>project-B</artifactId>
        <version>${project.version}</version>
    </dependency>

SpringToolSuite上的一切正常。我已经测试了第二个项目（取决于第一个项目），还测试了第三个项目（取决于第一和第二个项目），而STS的一切正常。

当我尝试执行时：MVN清洁安装-U -DSKiptests = true

它对project-A和project-B非常有效，但是对于project-C，我得到了：

[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] MyClassOnProjectC.java:[12,38] package XXX does not exist
[ERROR] MyClassOnProjectC.java:[22,17] cannot find symbol
  symbol:   class MyClassOnProjectB
  location: class MyClassOnProjectC

下面从每个项目中提取3个类：

project-a：user.java

package com.neweraed.datamodel;
import java.io.Serializable;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlType;
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "UserType", propOrder = {
    "name",
    "description",
})
public class User  implements Serializable {    
    private static final long serialVersionUID = -876063526825526098L;
    private String name;
    private String description;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

项目-B：useroperations.java

package com.neweraed.services.midpoint;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestOperations;
import com.neweraed.datamodel.User;
import com.neweraed.services.midpoint.utils.Constants;
import com.neweraed.services.midpoint.utils.Utils;
@Component
public class UserOperations {
    private static final Logger logger = LoggerFactory.getLogger(UserOperations.class);
    public User getUser(User user) {
        RestOperations restOperations = Utils.createGenericRestTemplate();
        ResponseEntity<User> response = null;
        try {
            response = restOperations.exchange(Constants.ENDPOIT_SEARCH_USER, HttpMethod.GET, new HttpEntity<Object>(Utils.createHeaders()), User.class);
            logger.info("=== RESPONSE ===" + response + " === ");
        } catch (Exception e) {
            logger.error("=== ERROR === " + e.getMessage() + " === ");
        }
        return user;
    }
}

项目-C：uservice.java

package com.neweraed.rest;
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 com.neweraed.datamodel.User;
import com.neweraed.services.midpoint.UserOperations;
@RestController
@RequestMapping(value="/api/v1/users")
public class UserService {

    @RequestMapping(value="/", method=RequestMethod.POST)
    public User addUser(@RequestBody User user) {
        UserOperations userOperations = new UserOperations();
        return userOperations.addUser(user);
    }
}

我的pom.xml文件上似乎一切正常。我该如何解决？

Answer 1

根据您的前提，项目B的pom.xml必须为：

<dependency>
    <groupId>com.mygroupid</groupId>
    <artifactId>project-A</artifactId>
    <version>${project.version}</version>
</dependency>

和project c不需要A的依赖项，因为它是在b