import com.sun.xml.internal.bind.v2.bytecode.ClassTailor; //导入依赖的package包/类
/**
 * Customizes a class file by replacing constant pools.
 *
 * @param templateClassName
 *      The resource that contains the template class file.
 * @param replacements
 *      A list of pair of strings that specify the substitution
 *      {@code String[]{search_0, replace_0, search_1, replace_1, ..., search_n, replace_n }
 *
 *      The search strings found in the constant pool will be replaced by the corresponding
 *      replacement string.
 */
private static byte[] tailor( String templateClassName, String newClassName, String... replacements ) {
    InputStream resource;
    if(CLASS_LOADER!=null)
        resource = CLASS_LOADER.getResourceAsStream(templateClassName+".class");
    else
        resource = ClassLoader.getSystemResourceAsStream(templateClassName+".class");
    if(resource==null)
        return null;

    return ClassTailor.tailor(resource,templateClassName,newClassName,replacements);
}
 

import com.sun.xml.internal.bind.v2.bytecode.ClassTailor; //导入依赖的package包/类
/**
 * Customizes a class file by replacing constant pools.
 *
 * @param templateClassName
 *      The resouce that contains the template class file.
 * @param replacements
 *      A list of pair of strings that specify the substitution
 *      {@code String[]{search_0, replace_0, search_1, replace_1, ..., search_n, replace_n }
 *
 *      The search strings found in the constant pool will be replaced by the corresponding
 *      replacement string.
 */
private static byte[] tailor( String templateClassName, String newClassName, String... replacements ) {
    InputStream resource;
    if(CLASS_LOADER!=null)
        resource = CLASS_LOADER.getResourceAsStream(templateClassName+".class");
    else
        resource = ClassLoader.getSystemResourceAsStream(templateClassName+".class");
    if(resource==null)
        return null;

    return ClassTailor.tailor(resource,templateClassName,newClassName,replacements);
}