jsonobject.java

一个extjs编写的代码

package anni.json;

import java.io.Writer;

import java.text.SimpleDateFormat;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;


public class JsonObject implements Json {
    private String inputDatePattern = "";
    private Map<String, Json> map = new HashMap<String, Json>();

    public JsonObject() {
        this("yyyy-MM-dd'T'HH:mm:ss");
    }

    public JsonObject(String inputDatePattern) {
        this.inputDatePattern = inputDatePattern;
    }

    // ====================================================
    // getter
    public byte getByte(String key) {
        try {
            return Byte.parseByte(map.get(key).toString());
        } catch (Exception ex) {
            return (byte) 0;
        }
    }

    public short getShort(String key) {
        try {
            return Short.parseShort(map.get(key).toString());
        } catch (Exception ex) {
            return (short) 0;
        }
    }

    public int getInt(String key) {
        try {
            return Integer.parseInt(map.get(key).toString());
        } catch (Exception ex) {
            return 0;
        }
    }

    public long getLong(String key) {
        try {
            return Long.parseLong(map.get(key).toString());
        } catch (Exception ex) {
            return (long) 0;
        }
    }

    public float getFloat(String key) {
        try {
            return Float.parseFloat(map.get(key).toString());
        } catch (Exception ex) {
            return 0f;
        }
    }

    public double getDouble(String key) {
        try {
            return Double.parseDouble(map.get(key).toString());
        } catch (Exception ex) {
            return 0d;
        }
    }

    public char getChar(String key) {
        try {
            Object value = map.get(key);

            return value.toString().charAt(0);
        } catch (Exception ex) {
            return '\0';
        }
    }

    public boolean getBoolean(String key) {
        try {
            return Boolean.parseBoolean(map.get(key).toString());
        } catch (Exception ex) {
            return false;
        }
    }

    public String getString(String key) {
        Json value = map.get(key);

        if (value == null) {
            return null;
        } else {
            return value.toString();
        }
    }

    public Date getDate(String key) {
        Json value = map.get(key);

        if (value == null) {
            return null;
        } else {
            try {
                return new SimpleDateFormat(inputDatePattern).parse(value
                    .toString());
            } catch (Exception ex) {
                System.err.println(ex);

                return null;
            }
        }
    }

    public JsonObject getObject(String key) {
        Json value = map.get(key);

        if (value == null) {
            return null;
        } else if (value instanceof JsonObject) {
            return (JsonObject) value;
        } else {
            return null;
        }
    }

    public JsonArray getArray(String key) {
        Json value = map.get(key);

        if (value == null) {
            return null;
        } else if (value instanceof JsonArray) {
            return (JsonArray) value;
        } else {
            return null;
        }
    }

    public void put(String key, Json value) {
        //System.out.println("key : " + key);
        //System.out.println("value : " + value);
        map.put(key, value);
    }

    public void write(Writer writer) {
        try {
            writer.flush();
        } catch (Exception ex) {
            System.err.println(ex);
        }
    }

    public String toString() {
        StringBuffer buff = new StringBuffer();
        buff.append("{");

        for (Map.Entry<String, Json> entry : map.entrySet()) {
            String key = entry.getKey();
            Json value = entry.getValue();
            buff.append("\"").append(key).append("\"").append(":")
                .append(value.toString()).append(",");
        }

        if (buff.length() > 1) {
            buff.deleteCharAt(buff.length() - 1);
        }

        buff.append("}");

        return buff.toString();
    }
}