Java使用JSONPath解析JSON完整内容详解

{
	"text": "张三",
	"expensive": 6,
	"body": {
		"rvNoNum": 23,
		"rvNoRecords": [{
			"score": 4,
			"rvAddress": "2",
			"consignments": null
		}, {
			"score": 8,
			"rvAddress": "3",
			"consignments": null
		}]
	}
}

private static void jsonPathTest() {
 JSONObject responseJson= jsonTest();//调用自定义的jsonTest()方法获得json对象，生成上面的json
 //输出text的值
 String text = JsonPath.read(responseJson,"$.text");
 
 //输出rvNoNum的值
 int rvNoNum = JsonPath.read(responseString,"$.body.rvNoNum");

	//输出rvNoRecords数组的第2个值
	List<Object> rvNoRecords = JsonPath.read(responseString,"$..rvNoRecords[1]");

	//输出rvNoRecords数组的第1和第2个值
 List<Object> rvNoRecords1 = JsonPath.read(responseString,"$..rvNoRecords[0,1]");

	//输出rvNoRecords数组中score<=expensive的所有值
	List<Object> rvNoRecords2 = JsonPath.read(responseString,"$..rvNoRecords[?(@.score < $['expensive'])]");
	
 //输出rvNoRecords[0]的rvAddress值
 String rvAddress1 = JsonPath.read(responseJson, "$.body.rvNoRecords[0].rvAddress");
 
 //输出全部rvAddress的值，使用Iterator迭代
 List<String> rvAddress = JsonPath.read(responseJson,"$.body.rvNoRecords[*].rvAddress");
 
 //输出rvNoRecords[*]中rvAddress== '2'的rvNoRecords
 List<Object> rvAddress2 = JsonPath.read(responseJson,"$.body.rvNoRecords[?(@.rvAddress == 2)]");  
 
 //输出rvNoRecords[*]中score>5 的rvNoRecords
 List<Object> score = JsonPath.read(responseJson,"$.body.rvNoRecords[?(@.score>5)]");
 
 //输出rvNoRecords[*]中含有consignments元素的rvNoRecords
 List<Double> consignments = JsonPath.read(responseString,"$.body.rvNoRecords[?(@.consignments)]");
 
 //输出该json中所有rvAddress的值
 List<Object> rvNoNum2 = JsonPath.read(responseString,"$..rvAddress");
 
 //输出rvNoRecords数组的长度
 List<Object> length = JsonPath.read(responseString,"$..rvNoRecords.length()");
 
 //可以提前编辑一个路径，并多次使用它
 JsonPath path = JsonPath.compile("$.body.rvNoRecords[*]");
 List<Object> rvNoRecords3 = path.read(responseString);
}