我正在尝试学习如何将 Neo4j 密码与 QueryDSL 一起使用。所以我从 neo4j/cypher-dsl GitHub repository 下载了源代码,并将项目作为 导入到 eclipse 中。 Maven项目 .但是,当我尝试编译和运行测试时,我收到一堆无法解析 Q{Something} 类的错误,例如:
QPerson cannot be resolved to a type
最佳答案
那些“Q”文件需要由 QueryDSL 生成。 “maven-apt-plugin”负责解决这个问题。下面的 pom 显示了您需要的内容:
<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.github.timmystorms</groupId>
<artifactId>neo4j-querydsl</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>maven-apt-plugin</artifactId>
<version>1.0.4</version>
<configuration>
<processor>com.mysema.query.apt.QuerydslAnnotationProcessor</processor>
</configuration>
<executions>
<execution>
<id>sources</id>
<phase>generate-sources</phase>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>src/main/java</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>com.mysema.maven</groupId>
<artifactId>maven-apt-plugin</artifactId>
<versionRange>[1.0.2,)</versionRange>
<goals>
<goal>process</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute />
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencies>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>1.9.RC1</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-cypher-dsl</artifactId>
<version>1.9.M04</version>
</dependency>
<dependency>
<groupId>com.mysema.querydsl</groupId>
<artifactId>querydsl-core</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>com.mysema.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>com.mysema.querydsl</groupId>
<artifactId>querydsl-lucene</artifactId>
<version>2.8.0</version>
<exclusions>
<exclusion>
<groupId>org.apache.lucene</groupId>
<artifactId>lucene-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Optional test dependencies -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
mvn clean install
.关于neo4j - Cypher-QueryDSL : 'My "Q"classes cannot be resolved' compile error (e. g。 Q人),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16408714/