【统一接口调用的设计与实现】-对象到报文的互换

public class JsonUtils {
    private static ObjectMapper objectMapper = new ObjectMapper();
    /**
     * Json内容转化为对象
     * @param content
     * @param valueType
     * @param <T>
     * @return
     * @throws IOException
     */
    public static  <T> T  readValue(String content, Class<T> valueType) throws IOException {
        return objectMapper.readValue(content,valueType);
    }
    /**
     * 对象转化为Json内容
     * @param t
     * @param <T>
     * @return
     * @throws IOException
     */
    public static  <T> String  writeValueAsString(T t) throws IOException {
        return objectMapper.writeValueAsString(t);
    }
}

/**
     * 通过Xml数据生成Bean对象
     * @param packagePath
     * @param rootClassName
     * @param xmlString
     */
    public static void generateByXml(String packagePath, String rootClassName,String rootXmlName, String xmlString) throws IOException {
        Document document = Dom4jUtils.getDocumentByContent(xmlString);
        Element root = document.getRootElement();
        Map<String, Object> mergeMap = new HashMap<String, Object>();
        mergeMap.put(rootClassName, parseXmlNode(root));
        generateClassByXml(packagePath, rootClassName, rootXmlName, mergeMap.get(rootClassName), true);
    }

 /**
     * 解析XML节点信息
     * @param element
     * @return
     */
    private static Object parseXmlNode(Element element) {
        if(checkElementIsArray(element)) {
            List result = new ArrayList();
            String xmlElementName = null;
            for (Object o : element.elements()) {
                Element subElement = (Element) o;
                xmlElementName = subElement.getName();//子元素名称
                Map<String, Object> fieldMap = (Map<String, Object>)parseXmlNode(subElement);
                mergeField(result, fieldMap);
            }
            result.add(xmlElementName);
            return result;
        }
        Map<String, Object> fieldMap = new LinkedHashMap<String, Object>();
        for (Object o : element.elements()) {
            Element subElement = (Element) o;
            fieldMap.put(subElement.getName(), parseXmlNode(subElement));
        }
        if(fieldMap.size() == 0) {
            return element.getTextTrim();
        }
        return fieldMap;
    }

/**
     * 生成类文件
     * @param packagePath
     * @param rootClassName
     * @param rootXmlName
     * @param data
     * @param isRoot
     */
    private static void generateClassByXml(String packagePath, String rootClassName,String rootXmlName, Object data, boolean isRoot) {
        com.hframe.generator.bean.Class beanClass = new com.hframe.generator.bean.Class();
        beanClass.setSrcFilePath("E:\\xfb_workspace\\boomshare\\bs-xfb-wx\\src\\main\\java\\");
        beanClass.setClassPackage(packagePath);
        beanClass.setClassName(rootClassName);
        beanClass.addConstructor();
        beanClass.addAnnotation("@XStreamAlias(\"" + rootXmlName + "\")");
        Map<String, Object> dataMap = new LinkedHashMap<String, Object>();
        if(data instanceof Map) {
            dataMap = (Map<String, Object>) data;
        }else if(data instanceof List){
            dataMap = (Map<String, Object>) ((List) data).get(0);
        }else {
            return ;
        }
        beanClass.addImportClass("com.thoughtworks.xstream.annotations.XStreamAlias");
        beanClass.addImportClass("com.thoughtworks.xstream.annotations.XStreamAsAttribute");
        for (String fieldName : dataMap.keySet()) {
            String subElementName = getSubElementName(dataMap.get(fieldName));
            Field field = getField(fieldName, dataMap.get(fieldName), subElementName);
            field.addFieldAnno("@XStreamAlias(\"" + fieldName + "\")");
            beanClass.addField(field);
            if(!"String".equals(field.getType())) {
                if(field.getType().startsWith("List<") && !beanClass.getImportClassList().contains("java.util.List")) {
                    beanClass.addImportClass("java.util.List");
                }
                if(isRoot) {
                    beanClass.addImportClass(packagePath + "." + CreatorUtil.getJavaClassName(rootClassName).toLowerCase() + ".*");
                }
                if(subElementName != null) {
                    generateClassByXml(packagePath + (isRoot ? ("." + CreatorUtil.getJavaClassName(rootClassName).toLowerCase()) : ""),
                            CreatorUtil.getJavaClassName(subElementName), subElementName, dataMap.get(fieldName), false);
                }else {
                    generateClassByXml(packagePath + (isRoot ? ("." + CreatorUtil.getJavaClassName(rootClassName).toLowerCase()) : ""),
                            CreatorUtil.getJavaClassName(fieldName), fieldName, dataMap.get(fieldName), false);
                }
            }
        }
        Map map = new HashMap();
        map.put("CLASS", beanClass);
        String content = VelocityUtil.produceTemplateContent("com/hframe/generator/vm/poByTemplate.vm", map);
        System.out.println(content);
        FileUtils.writeFile(beanClass.getFilePath(), content);
    } 

   public static void main(String[] args) throws IOException {
        String rootClassPath = Thread.currentThread().getContextClassLoader ().getResource("").getPath();
        String jsonString = FileUtils.readFile(rootClassPath + "test.json");
        generateByJson("com.wechat.bean.request","Menu",jsonString);
    }

@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY)
public class Menu   {
    @JsonProperty("button")
    private List<Button> buttonList;
    public Menu() {
        }
    public List<Button> getButtonList() {
        return buttonList;
    }
    public void setButtonList(List<Button> buttonList) {
        this.buttonList = buttonList;
    }
}

public class Button   {
    @JsonProperty("type")
    private String type;
    @JsonProperty("name")
    private String name;
    @JsonProperty("key")
    private String key;
    @JsonProperty("sub_button")
    private List<SubButton> subButtonList;
    public Button() {
        }
    
    public String getType(){
        return type;
    }
    public void setType(String type){
        this.type = type;
    }
     
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
     
    public String getKey(){
        return key;
    }
    public void setKey(String key){
        this.key = key;
    }
     
    public List<SubButton> getSubButtonList(){
        return subButtonList;
    }
    public void setSubButtonList(List<SubButton> subButtonList){
        this.subButtonList = subButtonList;
    }
}

public class SubButton   {
    @JsonProperty("type")
    private String type;
    @JsonProperty("name")
    private String name;
    @JsonProperty("url")
    private String url;
    @JsonProperty("key")
    private String key;
    public SubButton() {
    }
   
 
     
    public String getType(){
        return type;
    }
    public void setType(String type){
        this.type = type;
    }
     
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
     
    public String getUrl(){
        return url;
    }
    public void setUrl(String url){
        this.url = url;
    }
     
    public String getKey(){
        return key;
    }
    public void setKey(String key){
        this.key = key;
    }
}

{"button":[{"type":"click","name":"今日歌曲","key":"V1001_TODAY_MUSIC","sub_button":null},{"type":null,"name":"菜单","key":null,"sub_button":[{"type":"view","name":"搜索","url":"http://www.soso.com/","key":null},{"type":"view","name":"视频","url":"http://v.qq.com/","key":null},{"type":"click","name":"赞一下我们","url":null,"key":"V1001_GOOD"}]}]}