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public class ResponseBean<T> {
private int code;
private String message;
private String lang;
private String accessToken;
private String sign;
private int source;
private Date time;
private T value;
public ResponseBean() {
}
private ResponseBean(int code, T value) {
this(code, value, "");
}
private ResponseBean(int code, T value, String message) {
this.time = new Date();
this.lang = "zh_Cn";
this.source = 201;
this.code = code;
this.value = value;
this.message = message;
}
private ResponseBean(int code, String message) {
this.time = new Date();
this.lang = "zh_Cn";
this.source = 201;
this.code = code;
this.message = message;
}
public static <T> ResponseBean<T> error(String msg, T data) {
return new ResponseBean<>(200, data, msg);
}
省略get（）set()方法
}静态方法不能访问类中定义的泛型，如果静态方法中数据类型不确定，可以在方法上定义泛型。
即上例中<T>就是声名一个泛型T，之后两个T是在使用泛型T。