Struts <bean:write>标签问题

不知道你是怎么理解的，但是你要写个Bean，设置好get，set方法就行了。<jsp:useBean id="item" scope="request" class="你的Bean"/><bean:write name="item" property="你Bean里方法"/>可以看struts自带的例子，几乎所有的使用方法都有。

解决方案 »

  1.   

    <%@ page language="java" %>
    <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
    <html>
    <head>
    <title>Test struts-bean:write Tag</title>
    </head>
    <body bgcolor="white"><div align="center">
    <h1>Test struts-bean:write Tag</h1>
    </div><h3>Test 1 -- Scalar Variable Lookups</h3><%
      pageContext.setAttribute("test1.boolean", new Boolean(true));
      pageContext.setAttribute("test1.double", new Double(321.0));
      pageContext.setAttribute("test1.float", new Float((float) 123.0));
      pageContext.setAttribute("test1.int", new Integer(123));
      pageContext.setAttribute("test1.long", new Long(321));
      pageContext.setAttribute("test1.short", new Short((short) 987));
      pageContext.setAttribute("test1.string", "This is a string");
    %><table border="1">
    <tr>
      <th>Data Type</th>
      <th>Correct Value</th>
      <th>Test Result</th>
    </tr>
    <tr>
      <td>boolean</td>
      <td><%= pageContext.getAttribute("test1.boolean") %></td>
      <td><bean:write name="test1.boolean"/></td>
    </tr>
    <tr>
      <td>double</td>
      <td><%= pageContext.getAttribute("test1.double") %></td>
      <td><bean:write name="test1.double"/></td>
    </tr>
    <tr>
      <td>float</td>
      <td><%= pageContext.getAttribute("test1.float") %></td>
      <td><bean:write name="test1.float"/></td>
    </tr>
    <tr>
      <td>int</td>
      <td><%= pageContext.getAttribute("test1.int") %></td>
      <td><bean:write name="test1.int"/></td>
    </tr>
    <tr>
      <td>long</td>
      <td><%= pageContext.getAttribute("test1.long") %></td>
      <td><bean:write name="test1.long"/></td>
    </tr>
    <tr>
      <td>short</td>
      <td><%= pageContext.getAttribute("test1.short") %></td>
      <td><bean:write name="test1.short"/></td>
    </tr>
    <tr>
      <td>String</td>
      <td><%= pageContext.getAttribute("test1.string") %></td>
      <td><bean:write name="test1.string"/></td>
    </tr>
    </table><h3>Test 2 -- Scalar Property Lookups</h3><jsp:useBean id="test2" scope="page" class="org.apache.struts.webapp.exercise.TestBean"/><table border="1">
    <tr>
      <th>Data Type</th>
      <th>Correct Value</th>
      <th>Test Result</th>
    </tr>
    <tr>
      <td>boolean</td>
      <td><jsp:getProperty name="test2" property="booleanProperty"/>
      <td><bean:write name="test2" property="booleanProperty"/></td>
    </tr>
    <tr>
      <td>double</td>
      <td><jsp:getProperty name="test2" property="doubleProperty"/></td>
      <td><bean:write name="test2" property="doubleProperty"/></td>
    </tr>
    <tr>
      <td>float</td>
      <td><jsp:getProperty name="test2" property="floatProperty"/></td>
      <td><bean:write name="test2" property="floatProperty"/></td>
    </tr>
    <tr>
      <td>int</td>
      <td><jsp:getProperty name="test2" property="intProperty"/></td>
      <td><bean:write name="test2" property="intProperty"/></td>
    </tr>
    <tr>
      <td>long</td>
      <td><jsp:getProperty name="test2" property="longProperty"/></td>
      <td><bean:write name="test2" property="longProperty"/></td>
    </tr>
    <tr>
      <td>short</td>
      <td><jsp:getProperty name="test2" property="shortProperty"/></td>
      <td><bean:write name="test2" property="shortProperty"/></td>
    </tr>
    <tr>
      <td>String</td>
      <td><jsp:getProperty name="test2" property="stringProperty"/></td>
      <td><bean:write name="test2" property="stringProperty"/></td>
    </tr>
    </table><h3>Test 3 - Integer Array And Indexed Lookups</h3><jsp:useBean id="test3" scope="page" class="org.apache.struts.webapp.exercise.TestBean"/><table border="1">
    <tr>
      <th>Correct Value</th>
      <th>Array Result</th>
      <th>Indexed Result</th>
    </tr>
    <% for (int index = 0; index < 5; index++) { %>
      <tr>
        <td><%= index * 10 %></td>
        <td><bean:write name="test3" property='<%= "intArray[" + index + "]" %>'/></td>
        <td><bean:write name="test3" property='<%= "intIndexed[" + index + "]" %>'/></td>
      </tr>
    <% } %>
    </table>
    <h3>Test 4 - String Array And Indexed Lookups</h3><jsp:useBean id="test4" scope="page" class="org.apache.struts.webapp.exercise.TestBean"/><table border="1">
    <tr>
      <th>Correct Value</th>
      <th>Array Result</th>
      <th>Indexed Result</th>
    </tr>
    <% for (int index = 0; index < 5; index++) { %>
      <tr>
        <td><%= "String " + index %></td>
        <td><bean:write name="test4" property='<%= "stringArray[" + index + "]" %>'/></td>
        <td><bean:write name="test4" property='<%= "stringIndexed[" + index + "]" %>'/></td>
      </tr>
    <% } %>
    </table>
    <h3>Test 5 -- Nested Scalar Property Lookups</h3><jsp:useBean id="test5" scope="page" class="org.apache.struts.webapp.exercise.TestBean"/><table border="1">
    <tr>
      <th>Data Type</th>
      <th>Correct Value</th>
      <th>Test Result</th>
    </tr>
    <tr>
      <td>boolean</td>
      <td><jsp:getProperty name="test5" property="booleanProperty"/>
      <td><bean:write name="test5" property="nested.booleanProperty"/></td>
    </tr>
    <tr>
      <td>double</td>
      <td><jsp:getProperty name="test5" property="doubleProperty"/></td>
      <td><bean:write name="test5" property="nested.doubleProperty"/></td>
    </tr>
    <tr>
      <td>float</td>
      <td><jsp:getProperty name="test5" property="floatProperty"/></td>
      <td><bean:write name="test5" property="nested.floatProperty"/></td>
    </tr>
    <tr>
      <td>int</td>
      <td><jsp:getProperty name="test5" property="intProperty"/></td>
      <td><bean:write name="test5" property="nested.intProperty"/></td>
    </tr>
    <tr>
      <td>long</td>
      <td><jsp:getProperty name="test5" property="longProperty"/></td>
      <td><bean:write name="test5" property="nested.longProperty"/></td>
    </tr>
    <tr>
      <td>short</td>
      <td><jsp:getProperty name="test5" property="shortProperty"/></td>
      <td><bean:write name="test5" property="nested.shortProperty"/></td>
    </tr>
    <tr>
      <td>String</td>
      <td><jsp:getProperty name="test5" property="stringProperty"/></td>
      <td><bean:write name="test5" property="nested.stringProperty"/></td>
    </tr>
    </table><h3>Test 6 - Nested Integer Array And Indexed Lookups</h3><jsp:useBean id="test6" scope="page" class="org.apache.struts.webapp.exercise.TestBean"/><table border="1">
    <tr>
      <th>Correct Value</th>
      <th>Array Result</th>
      <th>Indexed Result</th>
    </tr>
    <% for (int index = 0; index < 5; index++) { %>
      <tr>
        <td><%= index * 10 %></td>
        <td><bean:write name="test6" property='<%= "nested.intArray[" + index + "]" %>'/></td>
        <td><bean:write name="test6" property='<%= "nested.intIndexed[" + index + "]" %>'/></td>
      </tr>
    <% } %>
    </table>
    </body>
    </html>
      

  2.   

    直接改写getAsText()或toString()方法我也不清楚，但如果写成getAsText(String propertyname)或toString(String propertyname),那样就容易多了，根据propertyname，你爱返回什么就返回什么。