sturts框架下返回json数据 list map 对象

package action; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.struts2.json.annotations.JSON; import com.opensymphony.xwork2.ActionSupport; public class Jsonaction extends ActionSupport { private static final long serialVersionUID = 1359090410097337654L; private List<Comment> comments = new ArrayList<Comment>(); public List<Comment> getComments() { Comment com1 = new Comment(); com1.setContent("这里是内容1"); com1.setId(1); com1.setNickname("陈杰"); Comment com2 = new Comment(); com2.setContent("这里是内容2"); com2.setId(2); com2.setNickname("Baiy"); comments.add(com1); comments.add(com2); return comments; } public void setComments(List<Comment> comments) { this.comments = comments; } private Map<String, String> map = new HashMap<String, String>(); public Map<String, String> getMap() { map.put("sex", "boy"); map.put("name", "baiy"); map.put("age", "1"); return map; } public void setMap(Map<String, String> map) { this.map = map; } //没getter and setter方法的属性不会被串行化到JSON private String title; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } //！！！使用transient修饰的属性也会被串行化到JSON private transient String content; @JSON(serialize=false) public String getContent() { return content; } public void setContent(String content) { this.content = content; } private Comment comment; public Comment getComment() { Comment com = new Comment(); com.setContent("Comment"); com.setId(1); com.setNickname("Nickname"); return com; } public void setComment(Comment comment) { this.comment = comment; } //------------------方法------------------------------ public String loadpage(){ return "success"; } public String loadjson() { title="这是标题"; content="我没有串行化到json"; return "success"; } }