如何使用生成器编写json数据啊？

用streaming方式生成跟刚才的用对象的方式生成基本上是一样的，就只是写法有点不一样：

FileWriter writer=new FileWriter("test.txt");
JsonGenerator gen=Json.createGenerator(writer); 
gen.writeStartObject()
.write("firstName", "Duke")
.write("lastName", "Java")
.write("age", 18)
.write("streetAddress", "100 Internet Dr")
.write("city", "JavaTown")
.write("state", "JA")
.write("postalCode", "12345")
.writeStartArray("phoneNumbers")
.writeStartObject()
.write("type", "mobile")
.write("number", "111-111-1111")
.writeEnd()
.writeStartObject()
.write("type", "home")
.write("number", "222-222-2222")
.writeEnd().writeEnd()
.writeEnd(); 
gen.close();