Question

我已将一个项目从Java 1.8迁移到Java11。在此过程中，我必须安装较新版本的eclipse才能使用Java 11 jdk。

Eclipse IDE for Enterprise Java Developers.
Version: 2018-12 (4.10.0)
Build id: 20181214-0600

该应用程序是一个maven项目，可以从命令行成功编译，但是eclipse抱怨它无法解析 javax.xml.datatype.XMLGregorianCalendar 。

我已经通过右键单击Maven项目-> Update Project从Eclipse更新了Maven项目。

从项目中我可以看到maven依赖项jaxp-api-1.4.2.jar被包含在内，并且类javax.xml.datatype.XMLGregorianCalendar存在。

如何解决Eclipse抱怨类javax.xml.datatype.XMLGregorianCalendar无法解决的问题？

具有无法解析的javax.xml.datatype.XMLGregorianCalendar的类：

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.2.11 
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2018.08.17 at 01:14:19 PM BST 
//


package com.qlsdistribution.fps.production.contentagent;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.datatype.XMLGregorianCalendar;



/**
 * <p>Java class for anonymous complex type.
 * 
 * <p>The following schema fragment specifies the expected content contained within this class.
 * 
 * <pre>
 * &lt;complexType&gt;
 *   &lt;complexContent&gt;
 *     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType"&gt;
 *       &lt;sequence&gt;
 *         &lt;element name="From" type="{http://www.w3.org/2001/XMLSchema}dateTime" minOccurs="0"/&gt;
 *         &lt;element name="To" type="{http://www.w3.org/2001/XMLSchema}dateTime" minOccurs="0"/&gt;
 *       &lt;/sequence&gt;
 *     &lt;/restriction&gt;
 *   &lt;/complexContent&gt;
 * &lt;/complexType&gt;
 * </pre>
 * 
 * 
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "from",
    "to"
})
@XmlRootElement(name = "JobAPI_GetArchivedJobs")
public class JobAPIGetArchivedJobs {

    @XmlElement(name = "From")
    @XmlSchemaType(name = "dateTime")
    protected XMLGregorianCalendar from;
    @XmlElement(name = "To")
    @XmlSchemaType(name = "dateTime")
    protected XMLGregorianCalendar to;

    /**
     * Gets the value of the from property.
     * 
     * @return
     *     possible object is
     *     {@link XMLGregorianCalendar }
     *     
     */
    public XMLGregorianCalendar getFrom() {
        return from;
    }

    /**
     * Sets the value of the from property.
     * 
     * @param value
     *     allowed object is
     *     {@link XMLGregorianCalendar }
     *     
     */
    public void setFrom(XMLGregorianCalendar value) {
        this.from = value;
    }

    /**
     * Gets the value of the to property.
     * 
     * @return
     *     possible object is
     *     {@link XMLGregorianCalendar }
     *     
     */
    public XMLGregorianCalendar getTo() {
        return to;
    }

    /**
     * Sets the value of the to property.
     * 
     * @param value
     *     allowed object is
     *     {@link XMLGregorianCalendar }
     *     
     */
    public void setTo(XMLGregorianCalendar value) {
        this.to = value;
    }

}

简化后的pom.xml版本：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.qlsdistribution.fps</groupId>
    <artifactId>fpsproduction</artifactId>
    <version>1.0.53</version>
    <packaging>jar</packaging>

    <name>fps-production</name>
    <description>FocalPoint Sever Production Tool</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.11</java.version>
        <maven.build.timestamp.format>yyyy-MM-dd HH:mm</maven.build.timestamp.format>
        <build.unknown>UNKNOWN</build.unknown>
        <build.number>${build.unknown}</build.number>
        <build.revision>${build.unknown}</build.revision>
        <build.time>${maven.build.timestamp}</build.time>

    </properties>
    <repositories>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com/</url>
        </repository>
    </repositories>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web-services</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- javax.validation  -->
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.inject</groupId>
            <artifactId>javax.inject</artifactId>
            <version>1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.ws.rs/javax.ws.rs-api -->
        <dependency>
            <groupId>javax.ws.rs</groupId>
            <artifactId>javax.ws.rs-api</artifactId>
            <version>2.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.xml/jaxp-api -->
        <dependency>
            <groupId>javax.xml</groupId>
            <artifactId>jaxp-api</artifactId>
            <version>1.4.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.annotation/jsr250-api -->
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>jsr250-api</artifactId>
            <version>1.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jaxb</groupId>
            <artifactId>jaxb-runtime</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <release>11</release>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.ow2.asm</groupId>
                        <artifactId>asm</artifactId>
                        <version>6.2</version> 
                    </dependency>
                </dependencies>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                        </manifest>
                        <manifestEntries>
                            <Implementation-Version>${project.version}-${build.number}(${build.time})</Implementation-Version>
                            <Implementation-Build>${build.number}</Implementation-Build>
                            <Implementation-SCM-Revision>${build.revision}</Implementation-SCM-Revision>
                            <Build-Time>${build.time}</Build-Time>
                        </manifestEntries>
                    </archive>
                    <release>11</release>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <release>11</release>  
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>springloaded</artifactId>
                        <version>1.2.8.RELEASE</version>
                    </dependency>
                </dependencies>
            </plugin>

            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <descriptors>
                        <descriptor>src/assembly/bundle.xml</descriptor>
                    </descriptors>
                    <release>11</release>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <configuration>
                    <release>11</release>  
                </configuration>
                <executions>
                    <execution>
                        <id>copy-resources</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>copy-resources</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>
                                ${project.build.outputDirectory}/static/docs
                            </outputDirectory>
                            <resources>
                                <resource>
                                    <directory>
                                        ${project.build.directory}/generated-docs
                                    </directory>
                                </resource>
                            </resources>
                        </configuration>
                    </execution>

                </executions>
            </plugin>
        </plugins>
    </build>
    <profiles>

        <!-- Dev Tools -->
        <profile>
            <!-- Need to specify normal profile as well when using this one -->
            <id>devtools</id>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-devtools</artifactId>
                    <optional>true</optional>
                </dependency>
            </dependencies>
        </profile>
        <profile>
            <id>dev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <filter>dev</filter>
            </properties>
        </profile>

    </profiles>
</project>

Answer 1

确保在 窗口>首选项：Java>已安装的JRE 中（或在macOS Eclipse>首选项：Java>已安装的JREs < / em>）

确保在项目c中将其用作执行环境：

在您的 JavaSE-11 中，用以下两行替换行
pom.xml
：
<java.version>1.11</java.version>
<maven.compiler.source>11</maven.compiler.source>

右键单击 项目，然后选择 Maven>更新项目...
< / li>

如果使用Java Platform Module System (JPMS)（=默认软件包包含文件<maven.compiler.target>11</maven.compiler.target>），请确保module-info.java包含行 module-info.java

→在 Package Explorer 或 Project Explorer 中，显示子节点 requires java.xml;

Answer 2

可能您的类型 javax.xml.datatype.XMLGregorianCalendar

存在重复的依赖项

尝试在此处发布此答案-> https://stackoverflow.com/a/61387697/11244881

Answer 3

我有一个刚刚解决的问题，方法是通过选择项目并按下鼠标的第二个按钮，使maven->更新项目。希望对您有帮助

Eclipse：找不到javax.xml.datatype.XMLGregorianCalendar-Java 11

3 个答案: