java中如何从一个url的地址文件中解析出json信息呢？

实现思路:
    1.先将url对应的字符串down下
	2.将字符串转换为json对象即可实现 java从一个url地址中解析出json信息

private static String readUrl(String urlString) throws Exception {
    BufferedReader reader = null;
    try {
        URL url = new URL(urlString);
        reader = new BufferedReader(new InputStreamReader(url.openStream()));
        StringBuffer buffer = new StringBuffer();
        int read;
        char[] chars = new char[1024];
        while ((read = reader.read(chars)) != -1)
            buffer.append(chars, 0, read); 

        return buffer.toString();
    } finally {
        if (reader != null)
            reader.close();
    }
} 
static class Item {
    String title;
    String link;
    String description;
}

static class Page {
    String title;
    String link;
    String description;
    String language;
    list<Item> items;
}

public static void main(String[] args) throws Exception {

    String json = readUrl("http://www.java265.com/"
                          + "file/jsonTest.json");

    Gson gson = new Gson();        
    Page page = gson.fromJson(json, Page.class);

    System.out.println(page.title);
    for (Item item : page.items)
        System.out.println("    " + item.title);
}