[英]Apache httpclient 4.3.1 java.lang.NoSuchFieldError: INSTANCE
I am developing a Java EE web application. 我正在开发一个Java EE Web应用程序。
here is my pom.xml: 这是我的pom.xml:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>bitcoin</groupId>
<artifactId>bitcoin</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>Chens Bitcoin Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- Define the version of the JBoss BOMs we want to import to specify tested stacks. -->
<version.jboss.bom>1.0.5.CR6</version.jboss.bom>
</properties>
<repositories>
<repository>
<id>prime-repo</id>
<name>Prime Repo</name>
<url>http://repository.primefaces.org</url>
</repository>
</repositories>
<dependencyManagement>
<dependencies>
<!-- Define the version of JBoss' Java EE 6 APIs we want to use -->
<!-- JBoss distributes a complete set of Java EE 6 APIs including
a Bill of Materials (BOM). A BOM specifies the versions of a "stack" (or
a collection) of artifacts. We use this here so that we always get the correct
versions of artifacts. Here we use the jboss-javaee-6.0-with-security stack
(you can read this as the JBoss stack of the Java EE 6 APIs with Security).
You can actually use this stack with any version of JBoss AS that implements
Java EE 6, not just JBoss AS 7! -->
<dependency>
<groupId>org.jboss.bom</groupId>
<artifactId>jboss-javaee-6.0-with-security</artifactId>
<version>${version.jboss.bom}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<!--<dependency>-->
<!--<groupId>org.jboss.spec.javax.faces</groupId>-->
<!--<artifactId>jboss-jsf-api_2.2_spec</artifactId>-->
<!--<version>2.2.0</version>-->
<!--</dependency>-->
<!--<dependency>-->
<!--<groupId>com.sun.faces</groupId>-->
<!--<artifactId>jsf-spi</artifactId>-->
<!--<version>1.0</version>-->
<!--</dependency>-->
<!-- Rewrite -->
<dependency>
<groupId>org.ocpsoft.rewrite</groupId>
<artifactId>rewrite-servlet</artifactId>
<version>2.0.8.Final</version>
</dependency>
<dependency>
<groupId>org.ocpsoft.rewrite</groupId>
<artifactId>rewrite-config-prettyfaces</artifactId>
<version>2.0.8.Final</version>
</dependency>
<dependency>
<groupId>org.omnifaces</groupId>
<artifactId>omnifaces</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>3.5</version>
</dependency>
<!-- Data time management -->
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.1</version>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
<!-- Import the PicketLink API, we deploy this as library with the application,
and can compile against it -->
<dependency>
<groupId>org.picketlink</groupId>
<artifactId>picketlink-core-api</artifactId>
</dependency>
<!-- Import the PicketLink implementation, we deploy this as library with the application,
but can't compile against it -->
<dependency>
<groupId>org.picketlink</groupId>
<artifactId>picketlink-core-impl</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>bitcoin</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.jboss.as.plugins</groupId>
<artifactId>jboss-as-maven-plugin</artifactId>
<version>7.4.Final</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>7.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
I have a method to create HttpClient, it works fine alone, but having problem when calling from jsf page: 我有一个创建HttpClient的方法,它可以单独工作,但从jsf页面调用时遇到问题:
public void doSth() {
......
HttpClient httpclient = HttpClientBuilder.create().build();
......
}
this method is invoked by commonbutton on JSF page, when button clicked following error occurred: 这个方法是由JSF页面上的commonbutton调用的,当按钮点击后发生以下错误:
Caused by: java.lang.NoSuchFieldError: INSTANCE
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:52) [httpcore-4.3.jar:4.3]
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:56) [httpcore-4.3.jar:4.3]
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<clinit>(DefaultHttpRequestWriterFactory.java:46) [httpcore-4.3.jar:4.3]
......
googled it, seems httpclient jar file has conflict with some other class, but I really can't figure out which one, and all dependencies in pom are necessary. 谷歌搜索它,似乎httpclient jar文件与其他一些类有冲突,但我真的无法弄清楚哪一个,并且pom中的所有依赖都是必要的。
BTW, I am using WildFly 8 CR as server. 顺便说一句,我使用WildFly 8 CR作为服务器。
Thanks in advance. 提前致谢。
You should not be mixing EE6 & 7 poms as it can bring you problems in your app. 您不应该混合使用EE6和7 poms,因为它可能会给您的应用带来问题。
For starter you should replace 对于起动器,您应该更换
<dependency>
<groupId>org.jboss.bom</groupId>
<artifactId>jboss-javaee-6.0-with-security</artifactId>
<version>${version.jboss.bom}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
With 同
<dependency>
<groupId>org.wildfly.bom</groupId>
<artifactId>jboss-javaee-7.0-with-security</artifactId>
<version>8.0.0</version>
<type>pom</scope>
<scope>import</scope>
</dependency>
you could also remove: 你也可以删除:
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
as you get all that already as part of jboss-javaee-7.0-with-security pom import but it does not hurt anyway. 因为你已经把所有这些都作为jboss-javaee-7.0-with-security pom import的一部分,但无论如何它都没有受到伤害。
Also replace 也替换
<plugin>
<groupId>org.jboss.as.plugins</groupId>
<artifactId>jboss-as-maven-plugin</artifactId>
<version>7.4.Final</version>
</plugin>
with: 有:
<plugin>
<groupId>org.wildfly.plugins</groupId>
<artifactId>wildfly-maven-plugin</artifactId>
<version>1.0.1.Final</version>
</plugin>
as othewise you will have problems with deploying to wildfly, also goal has changed from jboss-as:deploy
to wildfly:deploy
除非你在部署到wildfly时遇到问题,否则目标已经从
jboss-as:deploy
变为wildfly:deploy
you should be inspecting whole dependency tree if you have any duplicate http client in dependency tree. 如果依赖关系树中有任何重复的http客户端,则应该检查整个依赖关系树。
you can do that by running 你可以通过跑步来做到这一点
mvn dependency:tree
it will give you what dependency is bringing in and from where. 它将为您提供依赖带来的内容。
As a side note, you should upgrade to WildFly 8.0.0 Final. 作为旁注,您应该升级到WildFly 8.0.0 Final。 Not related to your problem but just to get many bugfixes...
与您的问题无关但只是为了获得许多错误修正...
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