在ssm框架下，MVC向前端返回數據的json工具類代碼如下：

public class JsonResult<T> {
    public static final int SUCCESS=0;
    public static final int ERROR=1;
    private int state;
    private T data;
    private String message;
    public JsonResult(int state,Throwable e){
        this.state=state;
        this.message=e.getMessage();
        
 
this.data=null;
    }
    public JsonResult() {
        super();
    }
    public JsonResult(T t){
        state=SUCCESS;
        data=t;
        message="";
    }
    public JsonResult(Throwable e){
        state=ERROR;
        data=null;
        message=e.getMessage();
    }
    public int getState() {
        
 
return state;
    }
    public void setState(int state) {
        this.state = state;
    }
    public T getData() {
        return data;
    }
    public void setData(T data) {
        this.data = data;
    }
    public String getMessage() {
        return message;
    }
    public void setMessage(String message) {
        
 
this.message = message;
    }
    public static int getSuccess() {
        return SUCCESS;
    }
    public static int getError() {
        return ERROR;
    }
    
}

springmvc返回json數據的工具類