把json格式转换成javaBean才可以。
于是查了一下资料，网上最多的资料就是下面的这种方式：
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String str = "[{"id":"","num":"","dt":"2010-07-21T17:29:28","consignee":"aaaa","bank":"001","ems":"0"}]";JSONArray array = JSONArray.fromObject(str);//先读取串数组Object[] o = array.toArray(); //转成对像数组System.err.println(o.length); JSONObject obj = JSONObject.fromObject(o[0]);//再使用JsonObject遍历一个个的对像Order oo = (Order)obj.toBean(obj,Order.class);//指定转换的类型，但仍需要强制转化-成功System.err.println(oo.getDt()+","+oo.getConsignee());String ss = oo.getDt(); |
需要jar包为：json-lib
但是京东提供的jar包里面我没有找到所需要的类。（不愿额外添加jar包）
于是继续找，终于找到了一个ObjectMapper
继续网上搜了一下这个类用法的例子，有，但是比较少，没有直接可以现成用的。
于是就开始自己尝试各种方法来做例子。
首先字符串：
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String str="{"student":[{"name":"leilei","age":23},{"name":"leilei02","age":23}]}"; |
接下来创建的是StudentList类
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public class StudentList { List<Student> student; public List<Student> getStudent() { return student; } public void setStudent(List<Student> student) { this.student = student; } } |
下面是Student类
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public class Student { private String name; private int age; //private StudentClass studentClass; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; }} |
最后测试程序
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import java.util.List;import org.codehaus.jackson.map.ObjectMapper;public class JsonToJavaBean { public static void main(String[] args) { String str="{"student":[{"name":"leilei","age":23},{"name":"leilei02","age":23}]}"; Student stu = null; List<Student> list = null; try { ObjectMapper objectMapper=new ObjectMapper(); StudentList studentList=objectMapper.readValue(str, StudentList.class); list=studentList.getStudent(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } for(Student s:list){ System.out.println(s.getName()); } } |
结果：
leilei
leilei02
成功。。兴奋ing!~
继续尝试一下在student的里面添加班级属性的方法
Class stuclass{
private int classid;
private int gradeid;
}