public static void main(String[] args){
String temp="{'data':{'a':[{'b1':'bb1','c1':'cc1'},{'b2':'bb2','c2':'cc2'}]}}"
JSONObject jodata =JSONObject.fromObject(temp)
JSONObject joa =JSONObject.fromObject(jodata.get("data").toString())
JSONArray ja=JSONArray.fromObject(joa.get("a"))
for(int i=0i<ja.size()i++){
JSONObject o=ja.getJSONObject(i)
if(o.get("b1")!=null){
System.out.println(o.get("b1"))
}
if(o.get("c1")!=null){
System.out.println(o.get("c1"))
}
if(o.get("b2")!=null){
System.out.println(o.get("b2"))
}
if(o.get("c2")!=null){
System.out.println(o.get("c2"))
}
}
}
注：要包含两个jar包ezmorph-1.0.6.jar和json-lib-2.2.2-jdk15.jar，jar包在附件中
可以使用 commons-jexl3 jar包示例:
public static void main(String[] args){
String expressionString = "1+2+3"
JexlEngine jexlEngine = new JexlBuilder().create()
JexlExpression jexlExpression = jexlEngine.createExpression(expressionString)
Object evaluate = jexlExpression.evaluate(null)
System.out.println(evaluate)
}
结果: 6
示例2:
来个复杂点的
public static void main(String[] args){
// String expressionString = "1+2+3"
String expressionString = "100*10-(200+300)"
JexlEngine jexlEngine = new JexlBuilder().create()
JexlExpression jexlExpression = jexlEngine.createExpression(expressionString)
Object evaluate = jexlExpression.evaluate(null)
System.out.println(evaluate)
}
结果: 500
