為實體類增加toJSON方法

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後期子類繼承該基礎類即可。

public class BaseEntity implements Serializable {    /**     *      */    private static final long serialVersionUID = -5311594725961174392L;    @Override    public String toString() {        try {            return toJSON();        } catch (IllegalArgumentException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        }        return null;    }        public String toJSON() throws IllegalArgumentException, IllegalAccessException {        StringBuilder jsonBuff = new StringBuilder();        jsonBuff.append("{");        Field[] fields = this.getClass().getDeclaredFields();        for (Field item : fields) {            item.setAccessible(true);            String name = item.getName();            jsonBuff.append("\"" + name + "\"" + ":");            Object value = item.get(this);            if (value != null) {                Class<?> type = item.getType();                if (type.equals(String.class)) {                    jsonBuff.append("\"" + value + "\"");                } else if (type.equals(int.class) || type.equals(Integer.class)) {                    jsonBuff.append(item.getInt(this));                } else if (type.equals(short.class) || type.equals(Short.class)) {                    jsonBuff.append(item.getShort(this));                } else if (type.equals(long.class) || type.equals(Long.class)) {                    jsonBuff.append(item.getLong(this));                } else if (type.equals(float.class) || type.equals(Float.class)) {                    jsonBuff.append(item.getFloat(this));                } else if (type.equals(double.class) || type.equals(Double.class)) {                    jsonBuff.append(item.getDouble(this));                } else if (type.equals(char.class)) {                    jsonBuff.append(item.getChar(this));                } else if (type.equals(boolean.class)) {                    jsonBuff.append(item.getBoolean(this));                } else if (type.equals(Map.class)) {                    jsonBuff.append(mapToString((Map)value));                } else if (type.equals(List.class)) {                    jsonBuff.append(listToString((List)value));                } else if (type.getSuperclass().equals(BaseEntity.class)) {                    jsonBuff.append(((BaseEntity)value).toJSON());                }            }            jsonBuff.append(", ");        }        return jsonBuff.substring(0, jsonBuff.length() - 2) + "}";    }        public String mapToString(Map<String, ? extends Object> map) {        StringBuilder buff = new StringBuilder();        Iterator<String> iter = map.keySet().iterator();        buff.append("{");        while (iter.hasNext()) {            String name = iter.next();            Object value = map.get(name);            buff.append("\"" + name + "\"" + ":");            if (value != null) {                String valueStr = String.valueOf(value);                if (value.getClass().equals(String.class)) {                    buff.append("\"" + valueStr + "\"");                } else {                    buff.append(valueStr);                }            }            buff.append(", ");        }        return buff.substring(0, buff.length() - 2) + "}";    }        public String listToString(List<? extends Object> list) {        StringBuilder buff = new StringBuilder();        buff.append("[");        for (Object value : list) {            String valueStr = String.valueOf(value);            if (value.getClass().equals(String.class)) {                buff.append("\"" + valueStr + "\"");            } else {                buff.append(valueStr);            }            buff.append(", ");        }        return buff.substring(0, buff.length() - 2) + "]";    }}

 

為實體類增加toJSON方法