我来自PHP世界，在php页面中间声明函数非常简单。我试图在JSP中做同样的事情：
public String getQuarter(int i){ String quarter; switch(i){ case 1: quarter = "Winter"; break; case 2: quarter = "Spring"; break; case 3: quarter = "Summer I"; break; case 4: quarter = "Summer II"; break; case 5: quarter = "Fall"; break; default: quarter = "ERROR"; } return quarter; }
我收到以下错误：
An error occurred at line: 20 in the jsp file: /headers.jsp Illegal modifier for the variable getQuarter; only final is permitted return;
您需要将其包含在<％中！％>如下：
<%! public String getQuarter(int i){ String quarter; switch(i){ case 1: quarter = "Winter"; break; case 2: quarter = "Spring"; break; case 3: quarter = "Summer I"; break; case 4: quarter = "Summer II"; break; case 5: quarter = "Fall"; break; default: quarter = "ERROR"; } return quarter; } %>
然后，您可以在脚本或表达式中调用该函数：
<% out.print(getQuarter(4)); %>
要么
<%= getQuarter(17) %>
