前端路径加/和不加/的区别
例如:http://localhost:8080/sale_war_exploded/h0
在表单中路径
如果sale_war_exploded/h0---------------http://localhost:8080/ch06/sale_war_exploded/h0-------正常
如果/sale_war_exploded/h0--------------http://localhost:8080/sale_war_exploded/h0
解决方法加el表达式${PageContext.request.contextpath}/sale_war_exploded/h0