Java 类常量

Question

我想为我也创建了一个实例的类定义一些公共(public)类常量类变量。

在我的 Response 类中，我定义了一些我想在整个应用程序中用作常量的 responseCodes。

请不要担心这段代码的意义，这只是片段的复制和粘贴，以展示我如何尝试使用类常量。

我的 IntelliJ 根本没有提示这种语法，但是当我尝试构建代码时，我得到了

Filter.java:[84,36] cannot find symbol
symbol  : variable BR_PARTIALLY_OK

我的带有常量的示例类

package xx.xx.xxxxx.connector;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Response {
    public static final int BR_OK                       = 200;
    public static final int BR_PARTIALLY_OK             = 250;
    public static final int BR_NOT_AUTHORIZED           = 401;
    public static final int BR_REQUEST_TIMEOUT          = 408;
    public static final int BR_NOT_IMPLEMENTED          = 501;
    public static final int BR_SERVICE_UNAVAILABLE      = 503;

    private Map<String, List<String>> headers = new HashMap<String, List<String>>();
    private String body = null;

    public void addHeader(String key, List<String> value) {
        this.headers.put(key, value);
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    public Map<String, List<String>> getHeaders() {
        return headers;
    }
}

在另一个类中使用的示例

package xx.xx.xxxxx.filter; // other package, other maven artifact but depends response package
import xx.xx.xxxxx.connector.Response;

public class Filter {
    public int doFilter(Service service) {
        Response myResponse = service.post(..);
        return Response.BR_PARTIALLY_OK;
    }
}

我也试过

import static xxx.xxx.Response.*

或

import static xxx.xxx.Response.BR_PARTIALLY_OK;

和使用

return BR_PARTIALLY_OK

导入时已经出现相同的“找不到符号”错误

我看过接口(interface)和 const 类的例子，但我想知道为什么这个例子不起作用

编辑:也许问题在于该类是在依赖工件中定义的？

pom.xml

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
         xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>xxx.xxxxx.xxx</groupId>
        <artifactId>connector</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>used the Response.BR_PARTIALLY_OK constant here</groupId>
    <artifactId>filter</artifactId>
    <version>${connector.filter.version}</version>

    <dependencies>
        <dependency>
            <groupId>defined the Response class in this artifact</groupId>
            <artifactId>component</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>           

        <dependency>
            <groupId>info.magnolia</groupId>
            <artifactId>magnolia-core</artifactId>
            <version>4.5.4</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>net.sourceforge.openutils</groupId>
            <artifactId>openutils-log4j</artifactId>
            <version>2.0.5</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.4</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- Testing Dependencies -->
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-all</artifactId>
            <version>1.9.5</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>magnolia.public</id>
            <url>http://nexus.magnolia-cms.com/content/groups/public</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

Answer 1

我发现错误信息有点不对。

“变量 BR_PARTIALLY_OK”

变量？这将使我假设代码不包含“Response.BR_PARTIALLY_OK”，而只包含“BR_PARTIALLY_OK”。