如何使用JAXB API从xsd生成类？

问题描述

我需要在不使用xjc命令或ant的情况下从.xsd生成bean类。我在Apache Axis2中找到了实现，但我无法生成工件。

I need to generate bean classes from .xsd without using xjc command or ant. i have found the implementation in Apache Axis2 but i am unable to generate the artifacts.

我写了以下代码，但是我得到了NullPointerException：

i have written the following code but i get NullPointerException :

SchemaCompiler sc = XJC.createSchemaCompiler();
 URL url = new URL("file://E:\\JAXB\\books.xsd");
 sc.parseSchema(new InputSource(url.toExternalForm()));
 S2JJAXBModel model = sc.bind();
 JCodeModel cm = model.generateCode(null, null);
 cm.build(new FileCodeWriter(new File("E:\\JAXBTest")));

任何人都可以帮助我/提供一些链接???

Can anyone help me / provide some links???

推荐答案

虽然我没有尝试过Axis2的XJC，但是我尝试了Sun的，我很确定你的架构的URL是错误的：你需要三个斜杠（因为权威 部分被遗漏，因为它是具有绝对路径的本地资源

While I haven't tried Axis2's XJC, I tried Sun's and I am pretty sure that your URL for the schema is wrong: You need three slashes (since the "authority" part is left out since it's a local resource with an absolute path)

或者，甚至更简单，构造一个文件并在其上调用toURI（），如下所示： / p>

Or, even simpler, construct a File and call toURI() on it, like this:

SchemaCompiler sc = XJC.createSchemaCompiler();
File file = new File("D:\\my-dir\\my-schema.xsd");
sc.setErrorListener(... );
sc.parseSchema(new InputSource(file.toURI().toString()));
S2JJAXBModel model = sc.bind();
JCodeModel cm = model.generateCode(null, null);
cm.build(new File("."));

这为我生成了所需的文件。你需要在类路径上使用tools.jar。快乐的代码生成！

This produced the desired files for me. You need tools.jar on the classpath. Happy code generation!

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