java - Struts 2中的Json插件出现问题

我有以下代码，并且我想实现以下功能:/getJson将以json的形式返回用户对象，而/getJson2将以Json的形式返回user2。

@ParentPackage("json-default")
public class JsonAction extends ActionSupport{
private User user = new User("John","Smith");
private User user2 = new User("Smith","John");
public String populate(){

    return "populate";
}

@Action(value="/getJson", results = {
        @Result(name="success", type="json")})
public String test(){
    return "success";
}

@Action(value="/getJson2", results = {
        @Result(name="success", type="json")})
public String test2(){
    return "success";
}

@JSON(name="user")
public User getUser() {
    return user;
}

public void setUser(User user) {
    this.user = user;
}

@JSON(name="user2")
public User getUser2() {
    return user2;
}

public void setUser2(User user2) {
    this.user2 = user2;
}
}

当前，无论我使用哪种方法，我仍然会得到以下结果:

{"user":{"firstName":"John","lastName":"Smith"},"user2":{"firstName":"Smith","lastName":"John"}}

是否可以？

更新:

我修改了代码:

public class JsonAction extends ActionSupport{
private User user = new User("John","Smith");
private User user2 = new User("Smith","John");
public String populate(){

    return "populate";
}

@Action(value="/getJson", results = {
        @Result(name="success", type="json",params = {
                "includeProperties",
                "user"})})
public String test(){
    return "success";
}

@Action(value="/getJson2", results = {
        @Result(name="success", type="json",params = {
                "includeProperties",
                "user2"})})
public String test2(){
    return "success";
}

@JSON(name="user")
public User getUser() {
    return user;
}

public void setUser(User user) {
    this.user = user;
}

@JSON(name="user2")
public User getUser2() {
    return user2;
}

public void setUser2(User user2) {
    this.user2 = user2;
}
}

现在我得到

{"user":{}}

和

{"user2":{}}

最佳答案

是的，有可能，该解决方案需要使用包含/排除参数。

以下是一个示例。

方法getJson1和getJson2显示includeParameters，而getJson3显示excludeParameters。

注意:尽管该示例使用字符串作为include/exclude参数的参数，但该字符串被解释为正则表达式。因此，我可以将action3上的“string1，string2”替换为“string *”。

有关更多信息，请参见:https://cwiki.apache.org/confluence/display/WW/JSON%20Plugin

package struts2;

import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;

@ParentPackage("json-default")
public class Test2 extends ActionSupport {

    private String string1 = "One";
    private String string2 = "Two";
    private String other = "Other";

    public String getString1() {
        return this.string1;
    }

    public String getString2() {
        return this.string2;
    }

    public String getOther() {
        return this.other;
    }

    @Action(value="/getJson1", results = {
        @Result(type = "json", params = {
            "includeProperties",
            "string1"
        })})
    public String action1() {
        return ActionSupport.SUCCESS;
    }

    @Action(value="/getJson2", results = {
        @Result(type = "json", params = {
            "includeProperties",
            "string2"
        })})
    public String action2() {
        return ActionSupport.SUCCESS;
    }

    @Action(value="/getJson3", results = {
        @Result(type = "json", params = {
            "excludeProperties",
            "string1, string2"
        })})
    public String action3() {
        return ActionSupport.SUCCESS;
    }
}

.../getJson1 返回{“string1”:“一个”}

.../getJson2 返回{“string2”:“Two”}

.../getJson3 返回{“other”:“Other”}