request.setCharacteEncoding=("utf-8");

post传参默认是带着content-type的，所以如果是在form表单method方法中传给url文件的参数是数字，则无影响。但如果传的参是汉字：则如果是用post方法，且不加标题语句的话，参数传过去无法解码，查询不显示。所以可以用get方法

个人理解，如有错误，望指正

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