如何使用GSON将JSON值映射到不同的类 [英] How to map JSON values onto a different class with GSON
问题描述
我在C#中有一个类,这个类在C#中有一个类, :
class Test
{
public string Foo {get;组;当我使用System.Web.Script.Serialization.JavaScriptSerializer对该类进行序列化时}}
}
,我得到:
{Foo:Bar}
在java中我有一个类:
class Test
{
private String foo;
public String getFoo(){
return foo;
}
public void setFoo(String foo){
this.foo = foo;
$ b我试图用GSON来解析JSON:
Gson gson = new Gson();
Test test = gson.fromJson(getJson(),Test.class);
但我得到空值。
如何将JSON值映射到稍微不同的类,以便我仍然可以在每种语言中使用最佳实践命名约定。 Gson默认使用字段名称,因此您的字段需要命名为 UpTime
, ComputerName
等等从Java命名的角度来看,这将是亵渎神明的。
保持字段正确地以Java风格命名为较低的骆驼大小写,并告诉Gson使用 FieldNamingPolicy.UPPER_CAMEL_CASE
来代替:
Gson gson = new GsonBuilder()
.setFieldNamingPolicy FieldNamingPolicy.UPPER_CAMEL_CASE)
.create();
统计stats = gson.fromJson(response.getJson(),Statistics.class);
或者,您可以调整C#端以输出较低的骆驼事件 { upTime:...}
当然。
Ok, I figured out my original question which was a trivial naming issue, so I will repurpose this question for the actual problem.
I have a class in C#:
class Test
{
public string Foo { get; set; }
}
When I serialize the class with System.Web.Script.Serialization.JavaScriptSerializer, I get:
{"Foo":"Bar"}
In java I have a class:
class Test
{
private String foo;
public String getFoo() {
return foo;
}
public void setFoo(String foo) {
this.foo = foo;
}
I'm attempting to use GSON to parse the JSON:
Gson gson = new Gson();
Test test = gson.fromJson(getJson(), Test.class);
But I get null values.
How can I map the JSON values onto a slightly different class so I can still use best practice naming conventions in each language.
解决方案 Gson by default uses the field names as-is, so your fields would need to be named UpTime
, ComputerName
, etc. From a Java naming perspective that would be blasphemous, though.
Keep your fields properly named in Java style as lower camel case and tell Gson to use FieldNamingPolicy.UPPER_CAMEL_CASE
instead:
Gson gson = new GsonBuilder()
.setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE)
.create();
Statistics stats = gson.fromJson(response.getJson(), Statistics.class);
Alternatively, you could adapt the C# side to output lower camel case {"upTime" : ... }
of course.
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