在Java中解析与构造JSON

 在 www.json.org<wbr style="LINE-HEIGHT: 1.3em"></wbr><wbr>上公布了很多Java下的json解析工具,其中org.json和json-lib比较简单,两者使用上差不多。下面两段源代码是分别使用这两个工具解析和构造JSON的演示程序。 http://nchc.dl.sourceforge.net/sourceforge/json-lib/json-lib-2.2.1-jdk15.jar<wbr style="LINE-HEIGHT: 1.3em"></wbr></wbr><wbr>
(Needs libs below:)
[
  • jakarta commons-lang 2.3
  • jakarta commons-beanutils 1.7.0
  • jakarta commons-collections 3.2
  • jakarta commons-logging 1.1
  • ezmorph 1.0.4
]
这是使用json-lib的程序:
import java.util.HashMap;
import java.util.Map;
import net.sf.json.JSONObject;
public class Test {
     public static void main(String[] args) {
         String json = "{\"name\":\"reiz\"}";
         JSONObject jsonObj = JSONObject.fromObject(json);
         String name = jsonObj.getString("name");
         jsonObj.put("initial", name.substring(0, 1).toUpperCase());
         String[] likes = new String[] { "JavaScript", "Skiing", "Apple Pie" };
         jsonObj.put("likes", likes);
         Map <String, String> ingredients = new HashMap <String, String>();
         ingredients.put("apples", "3kg");
         ingredients.put("sugar", "1kg");
         ingredients.put("pastry", "2.4kg");
         ingredients.put("bestEaten", "outdoors");
         jsonObj.put("ingredients",ingredients);
         System.out.println(jsonObj);
     }
} http://www.json.org/java/json.zip<wbr style="LINE-HEIGHT: 1.3em"></wbr></wbr><wbr>
这是使用org.json的程序:
import java.util.HashMap;
import java.util.Map;
import org.json.JSONException;
import org.json.JSONObject;
public class Test {
     public static void main(String[] args) throws JSONException {
         String json = "{\"name\":\"reiz\"}";
         JSONObject jsonObj = new JSONObject(json);
         String name = jsonObj.getString("name");
         jsonObj.put("initial", name.substring(0, 1).toUpperCase());
         String[] likes = new String[] { "JavaScript", "Skiing", "Apple Pie" };
         jsonObj.put("likes", likes);
         Map <String, String> ingredients = new HashMap <String, String>();
         ingredients.put("apples", "3kg");
         ingredients.put("sugar", "1kg");
         ingredients.put("pastry", "2.4kg");
         ingredients.put("bestEaten", "outdoors");
         jsonObj.put("ingredients", ingredients);
         System.out.println(jsonObj);
         System.out.println(jsonObj);
     }
}
两者的使用几乎是相同的,但org.json比json-lib要轻量得多,前者没有任何依赖,而后者要依赖ezmorph和commons的lang、logging、beanutils、collections等组件。

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