Java之使用json-lib进行对象与json字符串之间的转换

1、首先需要下载json-lib-2.4-jdk15.jar包。

下载地址：http://sourceforge.net/projects/json-lib/files/json-lib/json-lib-2.4/。也可以下载到源码

其他需要的jar:

a.commons-beanutils.jar

b.commons-collections.jar

c.commons-lang.jar

d.commons-logging.jar

e.ezmorph-1.0.6.jar

2、主要使用JSONObject进行对象与Json字符串之间的转换
方法：fromObject(object)
把对象转换为JSONObject对象，使用toString方法就可以获取json字符串
这个方法既可以传入对象，也可以传入json字符串
方法：toBean(JSONObject, class)
把json字符串转为对象
示例：

public static void main(String[] args) {
Student student = new Student("cb", 24, "04050102");
JSONObject object =	JSONObject.fromObject(student);
String json = object.toString();
System.out.println(json);
JSONObject jO = JSONObject.fromObject(object.toString());
Object object2 = JSONObject.toBean(jO, Student.class);
Student student2  = (Student)object2;
System.out.println(student2.getClassName());
}

Student类

public class Student {
private Person mPerson;
private String mClassName;

public Student() {

}

public Student(String name, int age, String className) {
mPerson = new Person(name, age);
mClassName = className;
}

public Person getPerson() {
return mPerson;
}

public void setPerson(Person person) {
mPerson = person;
}

public String getClassName() {
return mClassName;
}

public void setClassName(String className) {
mClassName = className;
}
}

Person类

public class Person {
private String mName;
private int mAge;

public Person() {

}

public Person(String name, int age) {
mName = name;
mAge = age;
}

public String getName() {
return mName;
}

public void setName(String name) {
mName = name;
}

public int getAge() {
return mAge;
}

public void setAge(int age) {
mAge = age;
}
}

源码下载点击打开链接