PHP JSON出错:Cannot use object of type stdClass as array解决方法,jsonstdclass
PHP JSON出错:Cannot use object of type stdClass as array解决方法,jsonstdclass
php再调用json_decode从字符串对象生成json对象时,如果使用[]操作符取数据,会得到下面的错误:
复制代码 代码如下:
Cannot use object of type stdClass as array
产生原因:
复制代码 代码如下:
$res = json_decode($res);
$res['key']; //把 json_decode() 后的对象当作数组使用。
解决方法(2种):
1、使用 json_decode($d, true)。就是使json_decode 的第二个变量设置为 true。
2、json_decode($res) 返回的是一个对象, 不可以使用 $res['key'] 进行访问, 换成 $res->key 就可以了。
确定你的mysql驱动放在项目中了么?
json数据格式没解析出来
1)启动Tomcat服务器,打开浏览器,输入(其中localhost是名称服务器或称为主机),
进入管理界面的登陆页面,这时候请输入原来安装时要求输入的用户名和密码,登陆到管理界面,
2)选择Resources-Data sources进入配置数据源界面,选择
Data Source Actions ->选择Create New Data Source,进入配置详细信息界面
主要内容例如下:
JNDI Name: ->jdbc/mysql
Data Source URL ->jdbc:mysql://localhost:3306/test
JDBC Driver Class-> org.gjt.mm.mysql.Driver
3)修改\conf\Catalina\localhost目录下建立一个xml文件,名称为你所发布的web应用的名称.xml,(如testpool.xml)打开添加内容如下:
type="javax.sql.DataSource"
password="123456"
driverClassName="org.gjt.mm.mysql.Driver"
maxIdle="2"
maxWait="50"
username="root"
url="jdbc:mysql://localhost:3306/test"
maxActive="4"/>
内容同conf/server.xml中
type="javax.sql.DataSource"
password="123456"
driverClassName="org.gjt.mm.mysql.Driver"
maxIdle="2"
maxWait="50"
username="root"
url="jdbc:mysql://localhost:3306/test"
maxActive="4"/>
少了这一步会报错:Cannot create JDBC driver of class '' for connect URL......余下全文>>

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