利用java怎么将二维数组转换为json

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具体方法如下：

package Tsets;public class erweiTojson { public static void main(String[] args) {  String[][] blogList = {   {"2008/07/07", "NetBeans New and Cool", "Tim Boudreau"},   {"2008/07/07", "NetBeans Mobility", "Ada Li"},   {"2008/07/07", "Creating WEB 2.0 Rich Internet Applications", "Michael Li"},   {"2008/07/08", "ajax and JSF", "Ada Li"},   {"2008/07/09", "Ruby on Rails in the Enterprise", "Liang Ye"},   {"2008/07/09", "Beans Binding and the Swing Application Framework", "Joey Shen"}  };  StringBuffer sb = new StringBuffer();  boolean first = true;  sb.append("[");  for (int i = 0; i < blogList.length; i++) {   String[] blogitem = blogList[i];   if (!first) {    sb.append(",");   }   sb.append("{");   sb.append("postdate: '" + blogItem[0] + "', ");   sb.append("title: '" + blogItem[1] + "', ");   sb.append("author: '" + blogItem[2] + "' ");   sb.append("}");   first = false;  }  sb.append("]");  System.out.println(sb.toString()); }}