Question

我写了一个测试方法。在这个项目中，我使用Morphia for MongoDB。但是，当我启动方法时，我得到以下错误：

java.lang.NoSuchMethodError: org.apache.log4j.Logger.log(Ljava/lang/String;Lorg/apache/log4j/Level;Ljava/lang/Object;Ljava/lang/Throwable;)V
at org.slf4j.impl.Log4jLoggerAdapter.info(Log4jLoggerAdapter.java:166)
at com.mongodb.diagnostics.logging.SLF4JLogger.info(SLF4JLogger.java:71)
at com.mongodb.connection.SingleServerCluster.<init>(SingleServerCluster.java:45)
at com.mongodb.connection.DefaultClusterFactory.create(DefaultClusterFactory.java:85)
at com.mongodb.Mongo.createCluster(Mongo.java:670)
at com.mongodb.Mongo.createCluster(Mongo.java:656)
at com.mongodb.Mongo.<init>(Mongo.java:278)
at com.mongodb.Mongo.<init>(Mongo.java:274)
at com.mongodb.MongoClient.<init>(MongoClient.java:174)
at com.mongodb.MongoClient.<init>(MongoClient.java:151)
at com.mongodb.MongoClient.<init>(MongoClient.java:141)
at de.meinTellerchen.utils.mongoDB.connection.MongoDBCon.<init>(MongoDBCon.java:65)
at de.meinTellerchen.ingredient.service.IngredientRestService.dataBaseConnection(IngredientRestService.java:34)
at de.meinTellerchen.ingredient.service.IngredientRestService.<init>(IngredientRestService.java:22)
at de.meinTellerchen.ingredient.service.IngredientRestServiceTest.test001_WriteIngredient(IngredientRestServiceTest.java:21)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

此测试中的方法创建一个Object并将其保存在带有Morphia的MongoDB中。

    @Test
public void test001_WriteIngredient() {
    Ingredient ingredient = generateIngredient();
    IngredientRestService ingredientRestService = new IngredientRestService();
    assertNotNull(ingredient);
    Response response = ingredientRestService.writeIngredient(ingredient);
    assertNotNull(response);

}

我不知道为什么它不起作用。我不使用Logger。

Answer 1

问题在于log4j和slf4j的版本在类路径中添加以下提到的jar： log4j的
SLF4J-简单
JCL-过SLF4J
SLF4J的API
具有适当版本的slf4j-log4j12 或使用maven来处理你的依赖。

罐子的兼容版本示例：
1）log4j-1.2.15.jar
2）slf4j-api-1.7.7.jar
3）commons-logging-1.0.4.jar
4）logback-classic-1.0.0.jar
5）logback-core-1.0.0.jar

Answer 2

类路径中缺少slf4j的依赖jar。

请打开系统中可用的mongodriver jar并查看meta-inf / MANIFEST.MF文件，并添加Import-Package：部分中提到的所需jar文件。

示例： Mongodb java驱动程序3.2.1 需要以下依赖的jar。

Import-Package: javax.xml.bind,javax.crypto,javax.crypto.spec,javax.ma nagement,javax.net,javax.net.ssl,javax.security.sasl,javax.security.a uth.callback,org.ietf.jgss,io.netty.bootstrap;resolution:=optional;ve rsion="[4.0,5)",io.netty.buffer;resolution:=optional;version="[4.0,5) ",io.netty.channel;resolution:=optional;version="[4.0,5)",io.netty.ch annel.nio;resolution:=optional;version="[4.0,5)",io.netty.channel.soc ket;resolution:=optional;version="[4.0,5)",io.netty.channel.socket.ni o;resolution:=optional;version="[4.0,5)",io.netty.handler.ssl;resolut ion:=optional;version="[4.0,5)",io.netty.handler.timeout;resolution:= optional;version="[4.0,5)",io.netty.util.concurrent;resolution:=optio nal;version="[4.0,5)",org.slf4j;resolution:=optional;version="[1.7,2) "

测试方法因日志错误而失败

2 个答案: