【微信Java开发 --番外篇】错误解析

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虽然在微信开发过程中，会有微信公众平台开发者文档中的《全局返回码》作为错误的参考对比；但是依旧的，会觉得有时候的问题莫名其妙。【注：本人使用weixin-java-tools进行开发】

下面吧微信开发过程中碰到的各种问题做一个归类【注：错误总结会在开发过程中一一补充】

一.自定义菜单---错误集合

1.创建自定义菜单{"errcode":40019,"errmsg":"invalid button key size hint: [a90WaA0296vr19]"}

错误代码：

十月 14, 2016 5:11:27 下午 org.apache.catalina.core.StandardContext loadOnStartup
严重: Servlet [rest] in web application [/wxFirst] threw load() exception
me.chanjar.weixin.common.exception.WxErrorException: {"errcode":40019,"errmsg":"invalid button key size hint: [a90WaA0296vr19]"}
at me.chanjar.weixin.mp.api.impl.WxMpServiceImpl.executeInternal(WxMpServiceImpl.java:476)
at me.chanjar.weixin.mp.api.impl.WxMpServiceImpl.execute(WxMpServiceImpl.java:425)
at me.chanjar.weixin.mp.api.impl.WxMpServiceImpl.post(WxMpServiceImpl.java:414)
at me.chanjar.weixin.mp.api.impl.WxMpMenuServiceImpl.menuCreate(WxMpMenuServiceImpl.java:35)
at com.sxd.controller.CenterController.<init>(CenterController.java:97)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1088)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1040)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:505)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:725)
at org.spring

这种错误对应代码错误的位置：

WxMenuButton button3=new WxMenuButton();
button3.setName("进入百度");
button3.setType("click");
button3.setUrl("http://www.baidu.com"); //URL类型的自定义按钮

错误分析：

发生这样的错误是因为，这个自定义菜单是用来做页面跳转的，即点击完了之后是要跳转到下一个页面的。所以：button3.setType("click");按钮的类型应该修改为button3.setType("view");

解决问题：

WxMenuButton button3=new WxMenuButton();
button3.setName("进入百度");
button3.setType("view");
button3.setUrl("http://www.baidu.com"); //URL类型的自定义按钮

------------------------------------------------------------------------------------------------------redirect_url参数异常----------------------------------------------------------------------------------------------------------

二.点击公众号上按钮，报错redirect_url参数异常

微信公众号下面的按钮，点击之后，报错redirect_url参数异常。

查找原因的方法：

因为做微信公众号开发，只能在手机微信上进行访问，没有办法调试，所以如果想在手机上看到微信访问的地址和传输的数据有哪些，可以在手机上下载一个【无root抓包】

启动之后界面如下：

点击启动按钮，绿色的按钮，然后去微信访问

找到微信访问的包，可以在里面看到详细信息。

解决方法：

1.设置按钮的这个地方的appId和redirect_uri后面跟的地址，直接写死，在一定程度上能避免这个问题

这样的话，需要取消关注，重新关注这个公众号，让按钮重新初始化一次，就能解决

private WxMenu createMenu()
{
WxMenu wxMenu = new WxMenu(); WxMenuButton firstMenuButton = new WxMenuButton();
firstMenuButton.setType("view");
firstMenuButton.setName("个人中心");
firstMenuButton.setKey("member");
firstMenuButton.setUrl("https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + "wx40263796f5de033c" + "&redirect_uri=" + "http://weixin.myagen.cn/" + "wx/member/showAllMemberInfo.jhtml&&response_type=code&scope=snsapi_base&state=xxxx_state#wechat_redirect");
WxMenuButton secondMenuButton = new WxMenuButton();
secondMenuButton.setType("view");
secondMenuButton.setName("订单");
secondMenuButton.setKey("member");
secondMenuButton.setUrl("https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + "wx40263796f5de033c" + "&redirect_uri=" + "http://weixin.myagen.cn/" + "wx/member/showAllMemberOrder.jhtml&&response_type=code&scope=snsapi_base&state=xxxx_state#wechat_redirect"); WxMenuButton threeMenuButton = new WxMenuButton();
threeMenuButton.setType("view");
threeMenuButton.setName("报告");
secondMenuButton.setKey("institution");
threeMenuButton.setUrl("https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + "wx40263796f5de033c" + "&redirect_uri=" + "http://weixin.myagen.cn/" + "wx/member/memberReport.jhtml&&response_type=code&scope=snsapi_base&state=xxxx_state#wechat_redirect"); List<WxMenuButton> firstMenuButtons = new ArrayList();
firstMenuButtons.add(firstMenuButton);
firstMenuButtons.add(secondMenuButton);
firstMenuButtons.add(threeMenuButton); wxMenu.setButtons(firstMenuButtons); return wxMenu;
}