EXTJS Ajax请求中文乱码

设置actionMethods, read为post

proxy: {
                type: 'ajax',  
                url: '../Dictionary/query',
                 actionMethods: {
                     read: 'POST'
                 },
                 extraParams: {
                    tableName: config.table,
                    owner: config.owner
                },
                reader: {
                    type: 'json',
                    rootProperty: 'datas',
                    totalProperty: 'total'
                }
            },