在jsp页面使用el表达式获取javaBean属性值

JavaBean类

package entity;

public class Student {

	private boolean flag;//是否接受协议
	
	public Student(){}

	public boolean getFlag() {
		return flag;
	}
	public void setFlag(boolean flag) {
		this.flag = flag;
	}
	
}

Servlet类

public class StudentServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request,response);
	}
	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		Student student = new Student();
		student.setFlag(false);
		
		request.setAttribute("student", student);
		request.getRequestDispatcher("student.jsp").forward(request, response);
	}

}

jsp页面

使用EL表达式获取JAVABEAN的属性值

${student.flag}

使用：

是否接受协议:<br/>
<c:if test="${student.flag eq false }">
<c:out value="不接受协议" ></c:out>
</c:if>
<c:if test="${student.flag eq true }">
<c:out value="接受协议" ></c:out>
</c:if>

如果student类中有List类型的属性list，在Jsp页面中遍历

<c:if test="${not empty student.list}">
    <c:forEach var="obj" items="${student.list}">
        ${obj}<br/>
    </c:forEach>
</c:if>

如果student类中有Map类型的属性map，在Jsp页面中遍历

<c:if test="${not empty student.map}">
    <c:forEach var="obj" items="${student.map}">
        ${obj.key}<br/>
    </c:forEach>
</c:if>