Gradle v7.3.3
我正在嘗試使用The Java Platform Plugin，到目前為止我的平臺build.gradle檔案中有這個
artifactId = "my-java-platform"
group = "com.mycompany.platform"
version = "1.0.0"
dependencies {
constraints {
...
api "org.slf4j:slf4j-log4j12:1.7.9"
api "org.projectlombok:lombok:1.16.18"
...
}
}
我做了一個./gradlew publishToMavenLocal并查看了pom.xml具有這兩個依賴項的結果檔案。
然后在我的應用程式build.gradle檔案中
repositories {
mavenLocal()
mavenCentral()
}
dependencies {
implementation platform(group: "com.company.platform", name: "my-java-platform", version: "1.0.0")
annotationProcessor platform(group: "com.company.platform", name: "my-java-platform", version: "1.0.0")
compileOnly group: "org.slf4j", name: "slf4j-log4j12"
compileOnly group: "org.projectlombok", name: "lombok"
...
}
我的一個應用程式源代碼有
package com.mycompany.common
import java.util.TimeZone;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.util.ISO8601DateFormat;
import com.fasterxml.jackson.datatype.guava.GuavaModule;
import com.fasterxml.jackson.datatype.jsr310.JSR310Module;
import lombok.extern.slf4j.Slf4j;
@Slf4j
public class ObjectMapperConfiguration {
private static ObjectMapper objectMapper;
/**
* Static only
*/
private ObjectMapperConfiguration() {}
/**
* Work with Spring to configure the ObjectMapper
*/
public static ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
objectMapper = builder.createXmlMapper(false).build();
configureObjectMapper(objectMapper);
log.info("The ObjectMapperConfiguration has run");
return objectMapper;
}
...
}
但我明白了
$ ./gradlew clean build
> Task :compileJava FAILED
/Users/.../src/main/java/com/company/common/ObjectMapperConfiguration.java:39: error: cannot find symbol
log.info("The ObjectMapperConfiguration has run");
^
symbol: variable log
location: class com.company.common.ObjectMapperConfiguration
我知道log變數是在@Slf4j注釋中定義的？如果是這樣，為什么我會收到錯誤訊息？謝謝！
uj5u.com熱心網友回復：
Lombok 魔法是通過注釋處理器實作的。
有關推薦的 Lombok Gradle 配置，請參見此處
dependencies {
compileOnly 'org.projectlombok:lombok:1.18.22'
annotationProcessor 'org.projectlombok:lombok:1.18.22'
testCompileOnly 'org.projectlombok:lombok:1.18.22'
testAnnotationProcessor 'org.projectlombok:lombok:1.18.22'
}
uj5u.com熱心網友回復：
應用程式的build.gradle檔案，即使用平臺的檔案，應如下所示
dependencies {
implementation platform(group: "com.mycompany.platform", name: "my-java-platform", version: "1.0.0")
annotationProcessor platform(group: "com.company.platform", name: "my-java-platform", version: "1.0.0")
annotationProcessor group: "org.projectlombok", name: "lombok"
...
}
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