定义TreeNode头结点struct TreeNode { int val; struct TreeNode *left; struct TreeNode *right; }; 在TreeNode.h文件中创建常用方法创建二叉树int CreateTree(TreeNode *&root) { int val; scanf("%d", &val); if(val<=0) { root = NULL; return 0; } root = (TreeNode...
尝试了很多,有在controller的返回方法上面加:@RequestMapping(value = "allproduct",produces={"application/json;","text/html;charset=UTF-8;"})也有:<mvc:annotation-driven > <!-- 消息转换器 --> <mvc:message-converters register-defaults="true"> <bean c...