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:
Java code?
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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:
Java code?
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String str= "{\"student\":[{\"name\":\"leilei\",\"age\":23},{\"name\":\"leilei02\",\"age\":23}]}" ;
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接下来创建的是StudentList类
Java code?
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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());
}
}
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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;
}