設唯一標識用戶的是id

String jsonString = "{";

preparedStatement = connection.prepareStatement("select name,url,page from table_a where id = 1 limit 1");

ResultSet rs = preparedStatement.executeQuery();

rs.first();

String name = rs.getString(1);

String url = rs.getString(2);

String page = rs.getInt(3);

jsonString += "'name':'" +name+ "',";

jsonString += "'url':'" + url + "',";

jsonString += "'page':" + page + ",";

jsonString += "'links':[";

rs = preparedStatement.executeQuery("select name,url from table_b where frid=1");

while(rs.next()){

jsonString+="{'name':'"+rs.name+"',";

jsonString+="'url':'"+rs.url+"'},";

}

jsonString = jsonString.substring(0,jsonString.length()-1);

jsonString += "]}";

rs.mustclose();

preparedStatement.mustclose();

connection.mustclose();

writer.write(jsonString);

writer.mustclose();

在安卓端請求該servlet后返回的jsonString用JSONObject 或其他工具類轉化為json對象用

總結

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