通过maven添加一个.jar文件到classpath [英] Adding a .jar file to classpath through maven
问题描述
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class ServerConfiguration {
public String info = null;
public String idlURL = null;
public String idlContents = null;
public List< ServerInfo> servers = new ArrayList<>();
public final void clear(){
info = null;
idlURL = null;
idlContents = null;
if(servers!= null)
servers.clear();
}
private final static ObjectReader jsonReader;
private final static ObjectWriter jsonWriter;
static {
ObjectMapper mapper = new ObjectMapper();
mapper.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY,true); //< ==错误:(52,15)java:无法访问com.fasterxml.jackson.core.JsonGenerator类文件for com.fasterxml.jackson.core.JsonGenerator not found
//mapper.configure( SerializationFeature.WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED,true);
jsonWriter = mapper.writer();
jsonReader = mapper.reader(ServerConfiguration.class);
}
public static ServerConfiguration fromJson(String json)throws IOException {
return jsonReader。< ServerConfiguration> readValue(json); //< ==错误:(59,26)java:无法访问com.fasterxml.jackson.core.JsonProcessingException类文件为com.fasterxml.jackson.core.JsonProcessingException未找到
}
public String toJson()throws IOException {
return jsonWriter.writeValueAsString(this);
}
}
阅读这个问题,我尝试添加( jackson-databind , jackson-core )到 pom.xml :
<依赖性>
<依赖关系>
< groupId> com.google.guava< / groupId>
< artifactId> guava< / artifactId>
< version> 17.0< / version>
< / dependency>
<依赖关系>
< groupId> io.netty< / groupId>
< artifactId> netty-all< / artifactId>
< version> 4.0.21.Final< / version>
< / dependency>
<依赖关系>
< groupId> com.fasterxml.jackson.core< / groupId>
< artifactId> jackson-databind< / artifactId>
< version> 2.3.3< / version>
< / dependency>
<依赖关系>
< groupId> com.fasterxml.jackson.core< / groupId>
< artifactId> jackson-core< / artifactId>
< version> 2.3.3< / version>
< / dependency>
<依赖关系>
< groupId> org.slf4j< / groupId>
< artifactId> slf4j-jdk14< / artifactId>
< version> 1.7.7< / version>
< / dependency>
<依赖关系>
< groupId> junit< / groupId>
< artifactId> junit< / artifactId>
< version> 4.10< / version>
< scope> test< / scope>
< / dependency>
<依赖关系>
< groupId> org.antlr< / groupId>
< artifactId> antlr4-maven-plugin< / artifactId>
< version> 4.2.2< / version>
< / dependency>
< / dependencies>
如何添加各自的依赖关系?
编辑#1:
给出的错误在下面(它们出现的行在上面的代码中标记):
错误:(52,15)java:无法访问com.fasterxml.jackson.core.JsonGenerator
类文件。没有找到fastxml.jackson.core.JsonGenerator
错误:(54,28)java:无法访问com.fasterxml.jackson.core.ObjectCodec
com.fasterxml.jackson.core.ObjectCodec的类文件不发现
错误:(55,28)java:无法访问com.fasterxml.jackson.core.Base64Variant
类文件为com.fasterxml.jackson.core.Base64Variant未找到
错误:( 59,26)java:无法访问com.fasterxml.jackson.core.JsonProcessingException
类文件为com.fasterxml.jackson.core.JsonProcessingException未找到
错误:(63,26)java:无法访问com.fasterxml.jackson.core.Versioned
com.fasterxml.jackson的类文件。 core.Versioned not found
编辑#2:
我似乎无法添加依赖关系:
你可以尝试使用 2.5.4
版本如下:
<依赖关系>
< groupId> com.fasterxml.jackson.core< / groupId>
< artifactId> jackson-databind< / artifactId>
< version> 2.5.4< / version>
< / dependency>
< dependency>
< groupId> com.fasterxml.jackson.core< / groupId>
< artifactId> jackson-core< / artifactId>
< version> 2.5.4< / version>
< / dependency>
<依赖关系>
< groupId> com.fasterxml.jackson.core< / groupId>
< artifactId> jackson-annotations< / artifactId>
< version> 2.5.4< / version>
< / dependency>
在IntelliJ中,尝试勾选复选框
我的意思是:项目结构 - >模块 - >依赖关系,在那里你的依赖关系
中的导出可以看到模块中包含的库。您还应在导出列中的每个库附近看到复选框
。
I'm having some trouble in getting maven to download a number of .jar files my application depends on. The code in which these dependencies are needed is bellow:
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class ServerConfiguration {
public String info = null;
public String idlURL = null;
public String idlContents = null;
public List<ServerInfo> servers = new ArrayList<>();
public final void clear() {
info = null;
idlURL = null;
idlContents = null;
if (servers != null)
servers.clear();
}
private final static ObjectReader jsonReader;
private final static ObjectWriter jsonWriter;
static {
ObjectMapper mapper = new ObjectMapper();
mapper.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true); // <== Error:(52, 15) java: cannot access com.fasterxml.jackson.core.JsonGenerator class file for com.fasterxml.jackson.core.JsonGenerator not found
//mapper.configure(SerializationFeature.WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED, true);
jsonWriter = mapper.writer();
jsonReader = mapper.reader(ServerConfiguration.class);
}
public static ServerConfiguration fromJson(String json) throws IOException {
return jsonReader.<ServerConfiguration>readValue(json); // <== Error:(59, 26) java: cannot access com.fasterxml.jackson.core.JsonProcessingException class file for com.fasterxml.jackson.core.JsonProcessingException not found
}
public String toJson() throws IOException {
return jsonWriter.writeValueAsString(this);
}
}
After reading this question, I tried adding the mentioned packages(jackson-databind, jackson-core) to pom.xml:
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>17.0</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.0.21.Final</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-jdk14</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.antlr</groupId>
<artifactId>antlr4-maven-plugin</artifactId>
<version>4.2.2</version>
</dependency>
</dependencies>
How can I add the respective dependencies?
Edit #1:
The errors given are bellow(the lines where they occur are marked in the code above):
Error:(52, 15) java: cannot access com.fasterxml.jackson.core.JsonGenerator
class file for com.fasterxml.jackson.core.JsonGenerator not found
Error:(54, 28) java: cannot access com.fasterxml.jackson.core.ObjectCodec
class file for com.fasterxml.jackson.core.ObjectCodec not found
Error:(55, 28) java: cannot access com.fasterxml.jackson.core.Base64Variant
class file for com.fasterxml.jackson.core.Base64Variant not found
Error:(59, 26) java: cannot access com.fasterxml.jackson.core.JsonProcessingException
class file for com.fasterxml.jackson.core.JsonProcessingException not found
Error:(63, 26) java: cannot access com.fasterxml.jackson.core.Versioned
class file for com.fasterxml.jackson.core.Versioned not found
Edit #2:
I can't seem to add the dependencies:
Can you try with 2.5.4
version as below:
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.5.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.5.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.5.4</version>
</dependency>
In IntelliJ, try to tick a checkbox
"export" in your dependencies
.
I mean: Project Structure -> Modules -> Dependencies, and there you can see libs included to the module. You should also see a checkbox
near each lib in column 'Export'.
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