如何在JAVA中生成所需格式的json字符串?
我需要以以下格式生成JSON字符串:如何在JAVA中生成所需格式的json字符串?,java,json,Java,Json,我需要以以下格式生成JSON字符串: [{"param1":"value1","param2":"value2"},{"param1":"value3","param2":"value4"}] ["{param1:value1,param2:value2}", "{param1:value3,param2:value4}"] 我尝试以以下方式存储数据: JSONArray jsonArray = JSONArray(); HashMap<String, String> hmap
[{"param1":"value1","param2":"value2"},{"param1":"value3","param2":"value4"}]
["{param1:value1,param2:value2}", "{param1:value3,param2:value4}"]
我尝试以以下方式存储数据:
JSONArray jsonArray = JSONArray();
HashMap<String, String> hmap = new HashMap<String, String>();
hmap.put("param1", "value1");
hmap.put("param2", "value2");
jsonArray.add(hmap);
hmap = new HashMap<String, String>();
hmap.put("param1", "value3");
hmap.put("param2", "value4");
jsonArray.add(hmap);
System.out.print(jsonArray.toString());
需要进行哪些更改才能将字符串设置为所需格式?这应该可以。使用JSONObject而不是映射,并将它们添加到JSONArray
JSONArray jsonArray = new JSONArray();
JSONObject jsonObject1= new JSONObject();
JSONObject jsonObject2= new JSONObject();
jsonObject1.put("param1", "value1");
jsonObject1.put("param2", "value2");
jsonArray.add(jsonObject1);
jsonObject2.put("param1", "value3");
jsonObject2.put("param2", "value4");
jsonArray.add(jsonObject2);
System.out.print(jsonArray.toString());
我建议使用第三方库(如XStream)作为更好的替代方案,它为您提供服务。使用抛弃,它将完全满足您的需求 导入org.codehaus.jettison.json.JSONArray 公共类JSONPrintTest扩展了TestCase{
public void testPrinting(){
JSONArray jsonArray = new JSONArray();
HashMap<String, String> hmap = new HashMap<String, String>();
hmap.put("param1", "value1");
hmap.put("param2", "value2");
jsonArray.put(hmap);
hmap = new HashMap<String, String>();
hmap.put("param1", "value3");
hmap.put("param2", "value4");
jsonArray.put(hmap);
System.out.print(jsonArray.toString());
}
public void testPrinting(){
JSONArray JSONArray=新的JSONArray();
HashMap hmap=新的HashMap();
hmap.put(“参数1”、“值1”);
hmap.put(“参数2”、“值2”);
jsonArray.put(hmap);
hmap=新的HashMap();
hmap.put(“参数1”、“值3”);
hmap.put(“参数2”、“值4”);
jsonArray.put(hmap);
System.out.print(jsonArray.toString());
}
}
输出:
[{“param1”:“value1”,“param2”:“value2”},{“param1”:“value3”,“param2”:“value4”}]+