webwork与orm结合时，参数绑定的方法

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webwork

ORM Webwork Struts Apache Servlet

问题1.从客户端传来的id,需要转化成持久化对象,webwork默认会为我们创建出空对象,但不满足,希望webwork能按照id值绑定持久化对象.
解决办法:创建自己的转化器
1.创建xwork-conversion.properties,内容如下

com.abest.common.domain.CommonEntity=com.abest.common.EntityWebworkConverter

其中CommonEntity为所有持久化实体类的超类，更详细的资料见:
http://wiki.opensymphony.com/display/XW/XWork+Conversion

2.实现自定义转换器

public class EntityWebworkConverter extends WebWorkTypeConverter {

    public static EntityWebworkConverterDelegate delegate = null;

    public EntityWebworkConverter() {
    }

    public Object convertFromString(Map map, String[] strings, Class toClass) {
        return delegate.convertFromString(map,strings,toClass);
    }

    public String convertToString(Map map, Object o) {
        return delegate.convertToString(map,o);
    }
}

public class EntityWebworkConverterDelegate extends WebWorkTypeConverter {

    private QueryService queryService = null;

    public EntityWebworkConverterDelegate(QueryService queryService) {
        this.queryService = queryService;
    }


    public Object convertFromString(Map map, String[] strings, Class toClass) {
        if(strings.length > 0)
        {
            int id = 0;
            try {
                id = Integer.parseInt(strings[0]);
            } catch (NumberFormatException e) {
            }
            if(id > 0)
            {
                return queryService.find(toClass,id);
            }
        }

        try {
            return toClass.newInstance();
        } catch (InstantiationException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

    public void setQueryService(QueryService queryService) {
        this.queryService = queryService;
    }


    public String convertToString(Map map, Object o) {
        return null;
    }
}

在这里，因为不了解webwork有什么合适的机制对converter的创建进行控制，因此，converter使用静态属性delegate，该属性由ServletContextListener来注入

这样便可完成参数的绑定了，页面传的参数形式，譬如 foo.bar=1即可

问题2:如何绑定到列表
1.使用java5泛型,xwork..-tiger.jar
2.客户端参数形式changedList[0].id=1,changedList[0].name=name,changedList[1].id=2,changedList[1].name=name2
3.预load对象,以使得其它属性能正确的绑定到对象中.处理逻辑为"先过滤出id,对起进行参数绑定,之后，再交由webwork自带的参数拦截器去绑定其它的参数",拦截器代码如下(保留使用原有的params拦截器):

public class AnotherGridEditDataBindInterceptor extends AroundInterceptor {
    protected void after(ActionInvocation actionInvocation, String s) throws Exception {

    }

    protected void before(ActionInvocation actionInvocation) throws Exception {
        Object action = actionInvocation.getAction();
        Map map = actionInvocation.getInvocationContext().getParameters();
        Map entityIdMap = new HashMap();
        for(int i = 0;i < 200;i++)
        {
            String key = "changedList[" + i + "].id";
            String[] ids = (String[]) map.get(key);
            if(ids != null && ids.length > 0)
            {
                entityIdMap.put("changedList["+i+"]",ids);
                map.remove(key);
            }
        }
        for(int i = 0;i < 200;i++)
        {
            String key = "newList[" + i + "].id";
            String[] ids = (String[]) map.get(key);
            if(ids != null && ids.length > 0)
            {
                entityIdMap.put("newList["+i+"]",ids);
                map.remove(key);
            }
        }
        bindParametersToTarget(entityIdMap,action);

    }



    private void bindParametersToTarget(Map propertiesValue, Object target) {
        ActionContext invocationContext = ActionContext.getContext();
        OgnlValueStack stack = null;
        Object preRoot = null;
        try {
            invocationContext.put(InstantiatingNullHandler.CREATE_NULL_OBJECTS, Boolean.TRUE);
            invocationContext.put(XWorkMethodAccessor.DENY_METHOD_EXECUTION, Boolean.TRUE);
            invocationContext.put(XWorkConverter.REPORT_CONVERSION_ERRORS, Boolean.TRUE);

            if (propertiesValue != null) {
                stack = ActionContext.getContext().getValueStack();
                preRoot = stack.pop();
                stack.push(target);

                for (Iterator iterator = propertiesValue.entrySet().iterator();
                     iterator.hasNext();) {
                    Map.Entry entry = (Map.Entry) iterator.next();
                    stack.setValue(entry.getKey().toString(), entry.getValue());
                }
            }
        } finally {
            invocationContext.put(InstantiatingNullHandler.CREATE_NULL_OBJECTS, Boolean.FALSE);
            invocationContext.put(XWorkMethodAccessor.DENY_METHOD_EXECUTION, Boolean.FALSE);
            invocationContext.put(XWorkConverter.REPORT_CONVERSION_ERRORS, Boolean.FALSE);
            if (preRoot != null) {
                stack.pop();
                stack.push(preRoot);
            }
        }
    }


}

其中，changedList表示的是修改过的对象，newList表示的是新增的对象

总结:需要建立Xwork的Converter,Interceptor。servlet的ServletContextListener为converter注入orm的持久对象查找方法;orm提供find(class,id)这样的方法

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基础学习:function | 明天就要上班了，郁闷

2007-06-12 02:38
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评论(9)
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9 楼 lijiangt 2007-06-28

不过感觉楼上几位思路更好，这样最简单。

8 楼 lijiangt 2007-06-28

主要是利用DynaBean,从客户端提交的数据都保存导DynaBean里面，然后再通过beanutils拷贝到实体对象里面去，现在准备用struts2,正打算实现一个拦截器，将客户端表单提交过来的数据保存到DynaBean对象里面，然后再手动拷贝导实体对象。

7 楼 lijiangt 2007-06-28

我最近也在思考这个问题，之前在struts 1.3.8里面都是这样做的： 
struts-config.xml 表单配置： 
<div class='code_title'>xml 代码</div>
<div class='dp-highlighter'>
<div class='bar'> </div>
<ol class='dp-xml' start='1'>
 <li class='alt'><form-bean name="projectForm" </li>
 <li class=''> type="org.apache.struts.validator.LazyValidatorForm"> </li>
 <li class='alt'></form-bean> </li>
</ol>
</div>
 
struts-config.xml action-mapping配置： 
<div class='code_title'>xml 代码</div>
<div class='dp-highlighter'>
<div class='bar'> </div>
<ol class='dp-xml' start='1'>
 <li class='alt'><action path="/project" </li>
 <li class=''> type="com.bupticet.strutsinterceptor.InterceptorActionProxy" </li>
 <li class='alt'> name="projectForm" parameter="method" scope="request" </li>
 <li class=''> validate="false" cancellable="true"> </li>
 <li class='alt'> <forward name="add-success" path="/add_project.jsp" /> </li>
 <li class=''> <forward name="save-success" </li>
 <li class='alt'> path="/project.do?method=view&amp;id=" redirect="true" /> </li>
 <li class=''> <forward name="save-cancel" path="/project.do" </li>
 <li class='alt'> redirect="true" /> </li>
 <li class=''> <forward name="save-failure" path="/add_project.jsp" /> </li>
 <li class='alt'> <forward name="edit-success" path="/edit_project.jsp" /> </li>
 <li class=''> <forward name="view-success" path="/view_project.jsp" /> </li>
 <li class='alt'> <forward name="list-success" path="/list_project.jsp" /> </li>
 <li class=''> <forward name="update-failure" path="/edit_project.jsp" /> </li>
 <li class='alt'> <forward name="update-cancel" path="/project.do" </li>
 <li class=''> redirect="true" /> </li>
 <li class='alt'> <forward name="update-success" </li>
 <li class=''> path="/project.do?method=view&amp;id=" redirect="true" /> </li>
 <li class='alt'> <forward name="delete-success" path="/project.do?method=list" redirect="true"/> </li>
 <li class=''> <forward name="search-page" path="/search_project.jsp"/> </li>
 <li class='alt'></action> </li>
</ol>
</div>
 
 
页面表单： 
<div class='code_title'>xml 代码</div>
<div class='dp-highlighter'>
<div class='bar'> </div>
<ol class='dp-xml' start='1'>
 <li class='alt'><html:form action="/project?method=save" method="post"> </li>
 <li class=''> <tr> </li>
 <li class='alt'> <td width='10%' nowrap class="boxHead">项目名称:</td> </li>
 <li class=''> <td background="../images/leftbg2.gif"><html:text property="name" size='100' maxlength='100'/></td> </li>
 <li class='alt'> </tr> </li>
 <li class=''> </li>
 <li class='alt'> <tr> </li>
 <li class=''> <td width='10%' nowrap class="boxHead">项目编号:</td> </li>
 <li class='alt'> <td background="../images/leftbg2.gif"><html:text property="projectNo" size='50' maxlength='60'/></td> </li>
 <li class=''> </tr> </li>
 <li class='alt'> </li>
 <li class=''> <tr> </li>
 <li class='alt'> <td width='10%' nowrap class="boxHead">项目类别:</td> </li>
 <li class=''> <td background="../images/leftbg2.gif"><html:text property="sort" size='50' maxlength='60'/> </li>
 <li class='alt'> <% </li>
 <li class=''> String[] allExistSorts = com.bupticet.research.web.collection.ProjectCollection.getExistSorts(); </li>
 <li class='alt'> if(allExistSorts.length>0){ </li>
 <li class=''> pageContext.setAttribute("allExistSorts", allExistSorts); </li>
 <li class='alt'> %> </li>
 <li class=''> &nbsp;&lt;==备选项:<html:select property="existSorts" onchange="autoPopulate(this,'sort');"> </li>
 <li class='alt'> <html:option value="-1">--- 请选择 ---</html:option> </li>
 <li class=''> <html:option value=""></html:option> </li>
 <li class='alt'> <html:options name="allExistSorts" labelName="allExistSorts" /> </li>
 <li class=''></html:select> </li>
 <li class='alt'><%} %> </li>
 <li class=''> </li>
 <li class='alt'> </td> </li>
 <li class=''> </tr> </li>
 <li class='alt'>...... </li>
</ol>
</div>
 
 
Action代码： 
<div class='code_title'>java 代码</div>
<div class='dp-highlighter'>
<div class='bar'> </div>
<ol class='dp-j' start='1'>
 <li class='alt'>/** </li>
 <li class=''> * </li>
 <li class='alt'> */ </li>
 <li class=''>package com.bupticet.research.web.action; </li>
 <li class='alt'> </li>
 <li class=''>import java.util.Enumeration; </li>
 <li class='alt'>import java.util.HashMap; </li>
 <li class=''>import java.util.List; </li>
 <li class='alt'>import java.util.Map; </li>
 <li class=''> </li>
 <li class='alt'>import javax.servlet.http.HttpServletRequest; </li>
 <li class=''>import javax.servlet.http.HttpServletResponse; </li>
 <li class='alt'> </li>
 <li class=''>import org.apache.commons.beanutils.BeanUtils; </li>
 <li class='alt'>import org.apache.commons.beanutils.DynaBean; </li>
 <li class=''>import org.apache.struts.action.ActionForm; </li>
 <li class='alt'>import org.apache.struts.action.ActionForward; </li>
 <li class=''>import org.apache.struts.action.ActionMapping; </li>
 <li class='alt'> </li>
 <li class=''>import com.bupticet.base.web.struts.BaseAction; </li>
 <li class='alt'>import com.bupticet.base.web.struts.StrutsUtils; </li>
 <li class=''>import com.bupticet.constant.StrutsConstant; </li>
 <li class='alt'>import com.bupticet.helper.GlobalSession; </li>
 <li class=''>import com.bupticet.model.ClientInfo; </li>
 <li class='alt'>import com.bupticet.research.entity.Fruit; </li>
 <li class=''>import com.bupticet.research.entity.Project; </li>
 <li class='alt'>import com.bupticet.research.service.ProjectManager; </li>
 <li class=''>import com.bupticet.util.RequestUtils; </li>
 <li class='alt'>import com.bupticet.util.encode.Decoder; </li>
 <li class=''> </li>
 <li class='alt'>/** </li>
 <li class=''> * @author lijt </li>
 <li class='alt'> * </li>
 <li class=''> */ </li>
 <li class='alt'>public class ProjectAction extends BaseAction { </li>
 <li class=''> </li>
 <li class='alt'> private ProjectManager projectManager; </li>
 <li class=''> </li>
 <li class='alt'> /** </li>
 <li class=''> * @param projectManager </li>
 <li class='alt'> * the projectManager to set </li>
 <li class=''> */ </li>
 <li class='alt'> public void setProjectManager(ProjectManager projectManager) { </li>
 <li class=''> this.projectManager = projectManager; </li>
 <li class='alt'> } </li>
 <li class=''> </li>
 <li class='alt'> /** </li>
 <li class=''> * </li>
 <li class='alt'> */ </li>
 <li class=''> public ProjectAction() { </li>
 <li class='alt'> } </li>
 <li class=''> </li>
 <li class='alt'> /* </li>
 <li class=''> * (non-Javadoc) </li>
 <li class='alt'> * </li>
 <li class=''> * @see com.bupticet.base.web.struts.BaseAction#delete(org.apache.struts.action.ActionMapping, </li>
 <li class='alt'> * org.apache.struts.action.ActionForm, </li>
 <li class=''> * javax.servlet.http.HttpServletRequest, </li>
 <li class='alt'> * javax.servlet.http.HttpServletResponse) </li>
 <li class=''> */ </li>
 <li class='alt'> @Override </li>
 <li class=''> public ActionForward delete(ActionMapping mapping, ActionForm form, </li>
 <li class='alt'> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class=''> String id = req.getParameter("id"); </li>
 <li class='alt'> checkInputPara(new String[] { id }); </li>
 <li class=''> projectManager.removeObject( id); </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.DELETE_SUCCESS); </li>
 <li class=''> } </li>
 <li class='alt'> </li>
 <li class=''> /* </li>
 <li class='alt'> * (non-Javadoc) </li>
 <li class=''> * </li>
 <li class='alt'> * @see com.bupticet.base.web.struts.BaseAction#edit(org.apache.struts.action.ActionMapping, </li>
 <li class=''> * org.apache.struts.action.ActionForm, </li>
 <li class='alt'> * javax.servlet.http.HttpServletRequest, </li>
 <li class=''> * javax.servlet.http.HttpServletResponse) </li>
 <li class='alt'> */ </li>
 <li class=''> @Override </li>
 <li class='alt'> public ActionForward edit(ActionMapping mapping, ActionForm form, </li>
 <li class=''> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class='alt'> String id = req.getParameter("id"); </li>
 <li class=''> checkInputPara(new String[] { id }); </li>
 <li class='alt'> Project p = projectManager.getObject( id); </li>
 <li class=''> if (p == null) { </li>
 <li class='alt'> this.throwEntityMissingException(); </li>
 <li class=''> } </li>
 <li class='alt'> DynaBean f = (DynaBean) form; </li>
 <li class=''> BeanUtils.copyProperties(f, p); </li>
 <li class='alt'> saveToken(req); </li>
 <li class=''> return mapping.findForward(StrutsConstant.EDIT_SUCCESS); </li>
 <li class='alt'> } </li>
 <li class=''> </li>
 <li class='alt'> /* </li>
 <li class=''> * (non-Javadoc) </li>
 <li class='alt'> * </li>
 <li class=''> * @see com.bupticet.base.web.struts.BaseAction#list(org.apache.struts.action.ActionMapping, </li>
 <li class='alt'> * org.apache.struts.action.ActionForm, </li>
 <li class=''> * javax.servlet.http.HttpServletRequest, </li>
 <li class='alt'> * javax.servlet.http.HttpServletResponse) </li>
 <li class=''> */ </li>
 <li class='alt'> @Override </li>
 <li class=''> public ActionForward list(ActionMapping mapping, ActionForm form, </li>
 <li class='alt'> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class=''> int pageNum = RequestUtils.getIntParameter(req, "pageNum", 1); </li>
 <li class='alt'> boolean isAsc = RequestUtils.getBooleanParameter(req, "isAsc", false); </li>
 <li class=''> String orderField = RequestUtils.getStringParameter(req, "orderField", </li>
 <li class='alt'> "project0.BEGIN_DATE"); </li>
 <li class=''> req.setAttribute("list", projectManager.getObjectsForPage( </li>
 <li class='alt'> pageNum, 20, orderField, isAsc)); </li>
 <li class=''> return mapping.findForward(StrutsConstant.LIST_SUCCESS); </li>
 <li class='alt'> } </li>
 <li class=''> </li>
 <li class='alt'> /* </li>
 <li class=''> * (non-Javadoc) </li>
 <li class='alt'> * </li>
 <li class=''> * @see com.bupticet.base.web.struts.BaseAction#save(org.apache.struts.action.ActionMapping, </li>
 <li class='alt'> * org.apache.struts.action.ActionForm, </li>
 <li class=''> * javax.servlet.http.HttpServletRequest, </li>
 <li class='alt'> * javax.servlet.http.HttpServletResponse) </li>
 <li class=''> */ </li>
 <li class='alt'> @Override </li>
 <li class=''> public ActionForward save(ActionMapping mapping, ActionForm form, </li>
 <li class='alt'> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class=''> if (isCancelled(req)) { </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.SAVE_CANCEL); </li>
 <li class=''> } </li>
 <li class='alt'> checkAndClearToken(req); </li>
 <li class=''> saveToken(req); </li>
 <li class='alt'> if (!this.validateForm(mapping, form, req)) { </li>
 <li class=''> return mapping.findForward(StrutsConstant.SAVE_FAILURE); </li>
 <li class='alt'> } </li>
 <li class=''> DynaBean f = (DynaBean) form; </li>
 <li class='alt'> if (null != projectManager.checkName((String) f.get("name"))) { </li>
 <li class=''> this.saveErrors(req, </li>
 <li class='alt'> addError("projectForm.error.existSameNameProject")); </li>
 <li class=''> return mapping.findForward(StrutsConstant.SAVE_FAILURE); </li>
 <li class='alt'> } </li>
 <li class=''> if (null != projectManager.checkNo((String) f.get("projectNo"))) { </li>
 <li class='alt'> this.saveErrors(req, </li>
 <li class=''> addError("projectForm.error.existSameNoProject")); </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.SAVE_FAILURE); </li>
 <li class=''> } </li>
 <li class='alt'> GlobalSession globalSession = (GlobalSession) req.getSession(true) </li>
 <li class=''> .getAttribute("globalSession"); </li>
 <li class='alt'> </li>
 <li class=''> Project project = new Project(); </li>
 <li class='alt'> BeanUtils.copyProperties(project, f); </li>
 <li class=''> project.setEnterorId(globalSession.getUserID()); </li>
 <li class='alt'> projectManager.saveObject( project); </li>
 <li class=''> return StrutsUtils.getExtForward(mapping, StrutsConstant.SAVE_SUCCESS, </li>
 <li class='alt'> project.getId()); </li>
 <li class=''> } </li>
 <li class='alt'> </li>
 <li class=''> /* </li>
 <li class='alt'> * (non-Javadoc) </li>
 <li class=''> * </li>
 <li class='alt'> * @see com.bupticet.base.web.struts.BaseAction#update(org.apache.struts.action.ActionMapping, </li>
 <li class=''> * org.apache.struts.action.ActionForm, </li>
 <li class='alt'> * javax.servlet.http.HttpServletRequest, </li>
 <li class=''> * javax.servlet.http.HttpServletResponse) </li>
 <li class='alt'> */ </li>
 <li class=''> @Override </li>
 <li class='alt'> public ActionForward update(ActionMapping mapping, ActionForm form, </li>
 <li class=''> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class='alt'> if (isCancelled(req)) { </li>
 <li class=''> return mapping.findForward(StrutsConstant.UPDATE_CANCEL); </li>
 <li class='alt'> } </li>
 <li class=''> checkAndClearToken(req); </li>
 <li class='alt'> saveToken(req); </li>
 <li class=''> if (!this.validateForm(mapping, form, req)) { </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.UPDATE_FAILURE); </li>
 <li class=''> } </li>
 <li class='alt'> DynaBean f = (DynaBean) form; </li>
 <li class=''> String id = (String) f.get("id"); </li>
 <li class='alt'> String existId = projectManager.checkName((String) f.get("name")); </li>
 <li class=''> if (existId != null && !id.equals(existId)) { </li>
 <li class='alt'> this.saveErrors(req, </li>
 <li class=''> addError("projectForm.error.existSameNameProject")); </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.UPDATE_FAILURE); </li>
 <li class=''> } </li>
 <li class='alt'> existId = projectManager.checkNo((String) f.get("projectNo")); </li>
 <li class=''> if (existId != null && !id.equals(existId)) { </li>
 <li class='alt'> this.saveErrors(req, </li>
 <li class=''> addError("projectForm.error.existSameNoProject")); </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.UPDATE_FAILURE); </li>
 <li class=''> } </li>
 <li class='alt'> Project project = projectManager.getObject( </li>
 <li class=''> (String) f.get("id")); </li>
 <li class='alt'> BeanUtils.copyProperties(project, f); </li>
 <li class=''> projectManager.saveObject( project); </li>
 <li class='alt'> return StrutsUtils.getExtForward(mapping, </li>
 <li class=''> StrutsConstant.UPDATE_SUCCESS, project.getId()); </li>
 <li class='alt'> } </li>
 <li class=''> </li>
 <li class='alt'> /* </li>
 <li class=''> * (non-Javadoc) </li>
 <li class='alt'> * </li>
 <li class=''> * @see com.bupticet.base.web.struts.BaseAction#view(org.apache.struts.action.ActionMapping, </li>
 <li class='alt'> * org.apache.struts.action.ActionForm, </li>
 <li class=''> * javax.servlet.http.HttpServletRequest, </li>
 <li class='alt'> * javax.servlet.http.HttpServletResponse) </li>
 <li class=''> */ </li>
 <li class='alt'> @Override </li>
 <li class=''> public ActionForward view(ActionMapping mapping, ActionForm form, </li>
 <li class='alt'> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class=''> String id = req.getParameter("id"); </li>
 <li class='alt'> checkInputPara(new String[] { id }); </li>
 <li class=''> Project p = projectManager.getObject( id); </li>
 <li class='alt'> if (p == null) { </li>
 <li class=''> this.throwEntityMissingException(); </li>
 <li class='alt'> } </li>
 <li class=''> List<Fruit> fruits = projectManager.getFruitsOfProject(p.getId()); </li>
 <li class='alt'> req.setAttribute("fruits", fruits); </li>
 <li class=''> req.setAttribute("info", p); </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.VIEW_SUCCESS); </li>
 <li class=''> } </li>
 <li class='alt'> </li>
 <li class=''> /** </li>
 <li class='alt'> * @param mapping </li>
 <li class=''> * @param form </li>
 <li class='alt'> * @param req </li>
 <li class=''> * @param res </li>
 <li class='alt'> * @return </li>
 <li class=''> * @throws Exception </li>
 <li class='alt'> */ </li>
 <li class=''> public ActionForward audit(ActionMapping mapping, ActionForm form, </li>
 <li class='alt'> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class=''> req.setAttribute("auditFlag", new Boolean(true)); </li>
 <li class='alt'> return this.edit(mapping, form, req, res); </li>
 <li class=''> } </li>
 <li class='alt'> </li>
 <li class=''> /** </li>
 <li class='alt'> * @param mapping </li>
 <li class=''> * @param form </li>
 <li class='alt'> * @param req </li>
 <li class=''> * @param res </li>
 <li class='alt'> * @return </li>
 <li class=''> * @throws Exception </li>
 <li class='alt'> */ </li>
 <li class=''> public ActionForward goSearch(ActionMapping mapping, ActionForm form, </li>
 <li class='alt'> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class=''> return mapping.findForward("search-page"); </li>
 <li class='alt'> } </li>
 <li class=''> </li>
 <li class='alt'> /** </li>
 <li class=''> * @param mapping </li>
 <li class='alt'> * @param form </li>
 <li class=''> * @param req </li>
 <li class='alt'> * @param res </li>
 <li class=''> * @return </li>
 <li class='alt'> * @throws Exception </li>
 <li class=''> */ </li>
 <li class='alt'> @SuppressWarnings("unchecked") </li>
 <li class=''> public ActionForward search(ActionMapping mapping, ActionForm form, </li>
 <li class='alt'> HttpServletRequest req, HttpServletResponse res) throws Exception { </li>
 <li class=''> Map<String, String> p = new HashMap<String, String>(); </li>
 <li class='alt'> for(Enumeration<String> e = req.getParameterNames();e.hasMoreElements();){ </li>
 <li class=''> String key = e.nextElement(); </li>
 <li class='alt'> String value = req.getParameter(key); </li>
 <li class=''> if (value != null && !"".equals(value)) { </li>
 <li class='alt'> p.put(key, Decoder.customDecode(value)); </li>
 <li class=''> } </li>
 <li class='alt'> } </li>
 <li class=''> int pageNum = RequestUtils.getIntParameter(req, "pageNum", 1); </li>
 <li class='alt'> boolean isAsc = RequestUtils.getBooleanParameter(req, "isAsc", false); </li>
 <li class=''> String orderField = RequestUtils.getStringParameter(req, "orderField", </li>
 <li class='alt'> "project0.BEGIN_DATE"); </li>
 <li class=''> req.setAttribute("list", projectManager.search(p, pageNum, 20, </li>
 <li class='alt'> orderField, isAsc)); </li>
 <li class=''> req.setAttribute("search", "true"); </li>
 <li class='alt'> return mapping.findForward(StrutsConstant.LIST_SUCCESS); </li>
 <li class=''> } </li>
 <li class='alt'> </li>
 <li class=''>} </li>
</ol>
</div>

6 楼 linqing 2007-06-26

    <!-- Services -->
    <bean id="documentManager"
          class="edirectory.service.impl.JpaDocumentManager"
          scope="singleton"
          autowire="byName" />
    <!-- Converters -->
    <bean id="edirectory.web.converter.DocumentConverter"
          class="edirectory.web.converter.DocumentConverter"
          scope="singleton"
          autowire="byName" />

5 楼 linqing 2007-06-26

/*
 * DocumentConventor.java
 *
 * Created on 2007?1?3?, ??11:15
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package edirectory.web.converter;

import com.opensymphony.webwork.util.WebWorkTypeConverter;
import edirectory.persistence.Document;
import edirectory.service.DocumentManager;
import java.util.Map;
import org.springframework.web.context.WebApplicationContext;

/**
 *
 * @author linqing
 */
public class DocumentConverter extends WebWorkTypeConverter {
    private DocumentManager documentManager;
    public String convertToString(Map context, Object o) {
            return ((Document)o).getId().toString();
    }

    public Object convertFromString(Map context, String[] values, Class toClass) {
        if(values[0].equals("") ) {
            return null;
        }
        Long id = Long.parseLong(values[0]);
        return documentManager.find(toClass, id);
    }

    public DocumentManager getDocumentManager() {
        return documentManager;
    }

    public void setDocumentManager(DocumentManager documentManager) {
        this.documentManager = documentManager;
    }
}

4 楼 linqing 2007-06-26

如果是Webwork2和Spring结合的话，可以把Converter直接配置到spring里面，转换的时候Webwork会取到这个Bean，名字为“com.abest.common.EntityWebworkConverter”

3 楼 lllyq 2007-06-14

这个一般我是用ModelDriven（在params之前）了，getModel中去判断有id则取，否则新建实例，用ModelDriven好在validation/i18n都一并绑定了，
多个对象的情况是通过一个ModelSetable对象对多个对象的引用来实现的，也是在getModel中拿，通过action上的范型声明是否为ModelSetable判断，参数传递跟你的类似，不过是keys数组与modelSet.models数组的参数传递，如keys[0]=1,modelSet.models[0].name=1,
keys[1]=2,modelSet.models[1].name=2

2 楼 winneryong 2007-06-12

能不能把你的代码贴全啊.包括配置文件,以及那些用ServletContextListener注入的代码

1 楼 downpour 2007-06-12

好方法！提供了我另外一个思路。

我以前一直是用拦截器+特殊命名规范来做的。比如，我规定，需要绑定持久化对象的命名必须以#结尾：foo.bar#=1。由于默认的params拦截器会把带有#符号的命名过滤掉，所以这些命名正好可以进入我自己的拦截器，截断以后拼上id，再load出来。

如果用Spring的话，我直接使用WebApplicationContextUtils中的静态方法来getBean获取Service，ServletContext则直接ServletActionContext.getServletContext()得到。其实你这里如果用Spring，也可以采取这种方式，应该不需要那个static的delegate了。

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