Xerces - 从字符串

时间:2016-03-08 15:08:50

标签: java xsd schema xerces

我想使用Xerces从字符串加载XML模式,但到目前为止,我只能从URI加载它:

final XMLSchemaLoader xsLoader = new XMLSchemaLoader();
final XSModel xsModel = xsLoader.loadURI(file.toURI().toString()); 

可用的加载方法:

XSLoader {
    public XSModel load(LSInput is) { }
    public XSModel loadInputList(LSInputList is) { }
    public XSModel loadURI(String uri) { }
    public XSModel loadURIList(StringList uriList) { }
}

是否有从字符串加载XML架构的选项?在我的上下文中,处理是在客户端完成的,因此不能使用URI方法。

谢谢。

2 个答案:

答案 0 :(得分:2)

我对您的问题并不是特别熟悉,但我发现这个有用的代码段来自ProgramCreek,它演示了如何从XSModel对象获取LSInput(您列出的第一种方法)以上)。也可以从输入流加载XML模式。我稍微修改了代码以达到这个目的:

private LSInput getLSInput(InputStream is) throws InstantiationException,
    IllegalAccessException, ClassNotFoundException {
    final DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();
    final DOMImplementationLS impl = (DOMImplementationLS)registry.getDOMImplementation("LS");

    LSInput domInput = impl.createLSInput();
    domInput.setByteStream(is);

    return domInput;
}

<强>用法:

// obtain your file through some means
File file;
LSInput ls = null;

try {
    InputStream is = new FileInputStream(file);

    // obtain an LSInput object
    LSInput ls = getLSInput(is);
} catch (FileNotFoundException e) {
    e.printStackTrace();
} catch (Exception e) {
    e.printStackTrace();
}

if (ls != null) {
    XMLSchemaLoader xsLoader = new XMLSchemaLoader();
    XSModel xsModel = xsLoader.load(ls);

    // now use your XSModel object here ...
}

答案 1 :(得分:2)

根据@TimBiegeleisen的回答,我构建了一个将字符串转换为XSModel的方法。

private static XSModel getSchema(String schemaText) throws ClassNotFoundException,
    InstantiationException, IllegalAccessException, ClassCastException {
    final InputStream stream = new ByteArrayInputStream(schemaText.getBytes(StandardCharsets.UTF_8));
    final LSInput input = new DOMInputImpl();
    input.setByteStream(stream);

    final XMLSchemaLoader xsLoader = new XMLSchemaLoader();
    return xsLoader.load(input);
}