动态Web项目:更改Java版本

Question

我正在使用maven。

这是pom.xml

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.webproject</groupId>
<artifactId>Employee</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>Employee Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>


    <!-- spring-context which provides core functionality -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.1.6.RELEASE</version>
    </dependency>

    <!-- The spring-aop module provides an AOP Alliance-compliant aspect-oriented 
        programming implementation allowing you to define -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>4.1.6.RELEASE</version>
    </dependency>

    <!-- The spring-webmvc module (also known as the Web-Servlet module) contains 
        Spring’s model-view-controller (MVC) and REST Web Services implementation 
        for web applications -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.1.6.RELEASE</version>
    </dependency>

    <!-- The spring-web module provides basic web-oriented integration features 
        such as multipart file upload functionality and the initialization of the 
        IoC container using Servlet listeners and a web-oriented application context -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.1.6.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>4.2.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate.common</groupId>
        <artifactId>hibernate-commons-annotations</artifactId>
        <version>4.0.1.Final</version>
        <classifier>tests</classifier>
    </dependency>
    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <version>1.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.0.0.GA</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.6.4</version>
    </dependency>
    <dependency>
        <groupId>org.jboss.logging</groupId>
        <artifactId>jboss-logging</artifactId>
        <version>3.1.0.CR2</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.6.4</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.6</version>
    </dependency>
    <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.6.3</version>
</dependency>
</dependencies>
<build>
    <finalName>Employee</finalName>
</build>

在项目资源管理器中，可以看到项目运行在java 1.5上。

​

​

所以我把它从项目的java构建路径改成了java 1.8

​

​

我删除了java 1.5，并将其指向java 1.8。

然后，这些变化是可见的。

但是当我更新pom.xml时，它再次显示为java1.5。

同样在项目方面，它是java 1.8

​

​

请帮我把它变成java 1.8

Answer 1

Sparsh，您应该在maven的插件选项中添加编译器级别

                               org.apache.maven.plugins             maven-compiler-plugin             2.3.2

        <configuration>
            <source>${jdk.version}</source>
            <target>${jdk.version}</target>
        </configuration>
      </plugin>
<plugins>

在你的属性节中，你应该有

<properties>
        <jdk.version>1.8</jdk.version>
</properties>