Jibx编译未发生

Question

我正在尝试使用JibX将XML转换为POJO。下面是我的主要方法：

IBindingFactory bfact = BindingDirectory.getFactory(Asset.class);   
IUnmarshallingContext uctx = bfact.createUnmarshallingContext();

FileInputStream inputStream = new FileInputStream("NewSample.xml");
Object obj = uctx.unmarshalDocument(inputStream, null);
Asset asset = (Asset)obj;

在尝试这样做时，我得到了如下异常：

Unable to access binding information for class com.adaequare.model.document.Asset
Make sure the binding has been compiled

在谷歌搜索之后，我发现了问题所在。绑定必须在JiBX绑定编译器的帮助下编译成类文件。在Jibx站点上提到，org.jibx.binding.Compile完成了这种绑定。所以我像这样修改了我的main方法：

package com.adaequare.client;
import org.jibx.binding.Compile;
import org.jibx.binding.Utility;
import org.jibx.runtime.BindingDirectory;
import org.jibx.runtime.IBindingFactory;
import org.jibx.runtime.IUnmarshallingContext;
import org.jibx.runtime.JiBXException;

import com.adaequare.model.document.Asset;
import com.google.common.base.Charsets;
import com.google.common.io.Files;

public class JibxTest {
    public static void main(String[] args) throws IOException { 
        try {
            Compile compiler = new Compile();
            compiler.compile(Utility.getClassPaths(), new String[]{"src/main/resources/jibx/AssetBinding.xml"});

            IBindingFactory bfact = BindingDirectory.getFactory(Asset.class);   
            IUnmarshallingContext uctx = bfact.createUnmarshallingContext();

            FileInputStream inputStream = new FileInputStream("NewSample.xml");
            Object obj = uctx.unmarshalDocument(inputStream, null);
            Asset asset = (Asset)obj;
        } catch (Exception e) {   
            e.printStackTrace();
        }
    }
}

在运行此命令时，我得到了以下异常：

Error running binding compiler
java.lang.NullPointerException
    at org.jibx.binding.classes.MungedClass.checkDirectory(MungedClass.java:241)
    at org.jibx.binding.classes.BoundClass.getGenericMunge(BoundClass.java:468)
    at org.jibx.binding.classes.BoundClass.getInstance(BoundClass.java:417)
    at org.jibx.binding.classes.BoundClass.getInstance(BoundClass.java:501)
    at org.jibx.binding.def.ObjectBinding.<init>(ObjectBinding.java:294)
    at org.jibx.binding.def.BindingBuilder.unmarshalObjectBinding(BindingBuilder.java:1150)
    at org.jibx.binding.def.BindingBuilder.unmarshalMapping(BindingBuilder.java:1888)
    at org.jibx.binding.def.BindingBuilder.unmarshalMappings(BindingBuilder.java:1243)
    at org.jibx.binding.def.BindingBuilder.unmarshalBindingDefinition(BindingBuilder.java:2245)
    at org.jibx.binding.Utility.loadBinding(Utility.java:300)
    at org.jibx.binding.Utility.loadFileBinding(Utility.java:420)
    at org.jibx.binding.Compile.compile(Compile.java:217)
    at com.adaequare.client.JibxTest.main(JibxTest.java:31)

当我检查MungedClass源代码时，它实际上是在查找名称以“JiBX_”开头的已编译类文件。由于没有符合条件的文件，因此生成的文件数组为空。当数组长度被访问时，会抛出NPE异常。

我加入compiler.compile的目的是为了运行Jibx绑定编译器。但是它仍然希望文件已经被它编译过了。我是不是漏掉了什么？

作为运行主类的另一种选择，我也在build.gradle中定义了它。这就是它：

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'war'
apply plugin: 'jetty'

sourceCompatibility = 1.7
version = 1.0

repositories {
    mavenCentral()
}

ext.springVersion = '4.0.2.RELEASE';
ext.jerseyVersion = '2.6';
ext.jettyVersion = '9.1.3.v20140225';
ext.jibxVersion = "1.2.5";
httpPort = 8099;

def springDependencies = ["org.springframework:spring-core:$springVersion",
    "org.springframework:spring-beans:$springVersion",
    "org.springframework:spring-context:$springVersion",
    "org.springframework:spring-web:$springVersion",
    "org.springframework:spring-webmvc:$springVersion",
    "org.springframework:spring-oxm:$springVersion"]

def jettyDependencies = ["org.eclipse.jetty:jetty-server:$jettyVersion",
    "org.eclipse.jetty:jetty-servlet:$jettyVersion"]

def jerseyDependencies = ["org.glassfish.jersey.containers:jersey-container-servlet:$jerseyVersion",
    'javax.ws.rs:javax.ws.rs-api:2.0']

def jibxDependencies = ["org.jibx:jibx-run:$jibxVersion",
    "org.jibx:jibx-bind:$jibxVersion",
    "org.jibx:jibx-extras:$jibxVersion"]

ext.libs = [
    springDependencies : springDependencies,
    jerseyDependencies : jerseyDependencies,
    jibxDependencies : jibxDependencies,
    guava: 'com.google.guava:guava:16.0.1',
    junit: 'junit:junit:4.11'
]

configurations { jibx }

dependencies {
    compile springDependencies;
    compile jibxDependencies;
    compile jerseyDependencies;
    compile("org.glassfish.jersey.ext:jersey-spring3:$jerseyVersion"){
        exclude group: 'org.springframework'
    };
    compile libs.guava;
    testCompile libs.junit;
    jibx libs.jibxDependencies;
}

task(type : JavaExec, 'generateBinding') {
    classpath = configurations.jibx + configurations.compile + sourceSets.main.runtimeClasspath
    main = 'org.jibx.binding.Compile'
    args = [
        'src/main/resources/jibx/AssetBinding.xml'
    ]
}

compileJava.doLast{
    tasks.generateBinding.execute();
}

task wrapper(type: Wrapper) {
    gradleVersion = '1.11'
}

在运行'gradle clean build‘时，它也抛出了与上面相同的异常。不确定我在这里错过了什么？

Answer 1

Prasanth，你为什么不让你的生活变得简单一点，从JiBX项目或我们的github网站上的一个简单的例子开始。

我建议你从这个例子开始：

https://github.com/jibx/maven-plugin/tree/master/test-suite/base-binding-test

这个项目中的示例有一个简单的程序来编组和解组xml。

祝好运!

完成

JiBX贡献者