在 Groovy 中,如何修复此错误:groovy.util.slurpersupport.GPathResult

问题描述 投票:0回答:2

给出以下代码片段:

@Grab(group='org.codehaus.groovy.modules.http-builder', module='http-builder', version='0.7.1')

def http = new groovyx.net.http.HTTPBuilder('http://www.codehaus.org'); // <<< THROWS EXCEPTION
println http

如何修复以下错误?

Caught: java.lang.NoClassDefFoundError: groovy/util/slurpersupport/GPathResult
java.lang.NoClassDefFoundError: groovy/util/slurpersupport/GPathResult
    at java.desktop/com.sun.beans.introspect.MethodInfo.get(MethodInfo.java:70)
    at java.desktop/com.sun.beans.introspect.ClassInfo.getMethods(ClassInfo.java:80)
    at groovyx.net.http.ParserRegistry.<init>(ParserRegistry.java:87)
    at groovyx.net.http.HTTPBuilder.<init>(HTTPBuilder.java:194)
    at HttpBuilder.run(HttpBuilder.groovy:4)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Caused by: java.lang.ClassNotFoundException: groovy.util.slurpersupport.GPathResult
    ... 8 more

我正在使用的 Groovy/Java/Gradle/Maven 版本

我正在使用 Groovy 4.0 和 JDK 17.0.2,如下所示:

groovy --version
Groovy Version: 4.0.0 JVM: 17.0.2 Vendor: Oracle Corporation OS: Windows 10

java -version
java version "17.0.2" 2022-01-18 LTS
Java(TM) SE Runtime Environment (build 17.0.2+8-LTS-86)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.2+8-LTS-86, mixed mode, sharing)

mvn --version
Apache Maven 3.8.4 (9b656c72d54e5bacbed989b64718c159fe39b537)
Maven home: D:\p\apache-maven-3.8.4
Java version: 17.0.2, vendor: Oracle Corporation, runtime: D:\p\jdk-17.0.2
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

gradle --version

------------------------------------------------------------
Gradle 7.4
------------------------------------------------------------

Build time:   2022-02-08 09:58:38 UTC
Revision:     f0d9291c04b90b59445041eaa75b2ee744162586

Kotlin:       1.5.31
Groovy:       3.0.9
Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM:          17.0.2 (Oracle Corporation 17.0.2+8-LTS-86)
OS:           Windows 10 10.0 amd64

寻找解决方案

问题背景

UDEMY Groovy 课程 https://www.udemy.com/course/apache-groovy/ 在关于使用 http-builder 库的 Groovy 中基于 REST 的客户端的讲座中提供了一些示例代码。

课程时使用的 groovy 和 java 版本

Java Version: 1.8.0_60
Groovy Version: 2.4.5
Gradle: 2.7
Maven: 3.3.3
Spring Boot: 3.0.M5
Spring Tool Suite (STS): 3.7.1.RELEASE-e4.5.1
On Windows 7 and Mac OS ?
groovy
2个回答
10
投票

我确定您有新版本的 groovy(例如 4.0.1),并且您使用的

http-builder
库相当旧。

从groovy 3.0开始

GPathResult
类移动到另一个包:
groovy.xml.slurpersupport.GPathResult

但根据错误 HTTPBuilder 正在寻找旧包

groovy.util.slurpersupport.GPathResult


选项1: 你必须降级groovy版本


选项2:黑客攻击

@Grab(group='org.codehaus.groovy.modules.http-builder', module='http-builder', version='0.7.1')
import groovyx.net.http.*

//define empty class with old name to prevent failure
this.getClass().getClassLoader().getParent().parseClass '''
  package groovy.util.slurpersupport
  class GPathResult{}
'''  

def http = new HTTPBuilder('http://httpbin.org')
//redefine xml parser to use xml slurper from a new package
//you don't need this if you are not going to work with xml
http.parser['application/xml']={HttpResponseDecorator r-> 
    return new groovy.xml.XmlSlurper().parse(r.entity.content)
}
http.get(path:'/xml',query:[a:123]){resp,body->
  println "status: ${resp.statusLine}"
  println groovy.xml.XmlUtil.serialize(body)
}

0
投票

我遇到了类似的问题,就我而言,解决方案是替换

groovy
依赖项:

        <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy</artifactId>
            <version>2.4.21</version>
        </dependency>

具有

groovy-all
依赖项,其中包含
groovy.util.slurpersupport.GPathResult
:

        <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>2.4.21</version>
        </dependency>
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