小编Nat*_*raj的帖子

在我的项目早期,我使用了Hibernate 3.3.2,openJPA 2.1.1的组合来连接数据库并从表中检索信息.现在我想删除Hibernate并使用openJPA进行连接并检索信息.

我之前的persistence.xml配置是

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence persistence_2_0.xsd">
<persistence-unit name="test" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
        <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
        <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
        <property name="hibernate.connection.url" value="jdbc:mysql://10.10.10.10:3306/test?autoReconnect=true"/>
        <property name="hibernate.connection.username" value="user"/>
        <property name="hibernate.connection.password" value="pwd"/>
        <property name="hibernate.generate_statistics" value="true"/>
        <property name="hibernate.cache.provider_class" value="org.hibernate.cache.OSCacheProvider"/>
        <property name="hibernate.cache.use_second_level_cache" value="true"/>
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.format_sql" value="true"/>
        <property name="hibernate.c3p0.min_size" value="5"/>
        <property name="hibernate.c3p0.max_size" value="20"/>
        <property name="hibernate.c3p0.timeout" value="1800"/>
        <property name="hibernate.c3p0.max_statements" value="50"/>
        <property name="hibernate.c3p0.idle_test_period" value="1800"/>
        <property name="c3p0.idleConnectionTestPeriod" value="1810"/>
      </properties>
   </persistence-unit>
</persistence>

现在我想转到openJPA 2.1.1,为此我的persistence.xml文件是

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" …

我是使用jqgrid的新手.

在新页面加载时,网格正在从数据库中正确加载数据.之后由于loadonce:true,网格没有从数据库重新加载数据以进行添加/编辑/删除.

我的应用程序组合是JSP,Servlet,MySQL

我有一个具有以下设置的网格

jQuery("#userList").jqGrid({
                    url: '<%=request.getContextPath()%>/userJqGrid?q=1&action=fetchData&userCookie=<%= encodedCookie%>',
                    datatype: 'xml',
                    mtype: 'GET',
                    colNames:['<%= userProp.getProperty(userColNames[0])%>',
                              '<%= userProp.getProperty(userColNames[1])%>',
                              '<%= userProp.getProperty(userColNames[2])%>',
                              '<%= userProp.getProperty(userColNames[3])%>',
                              '<%= userProp.getProperty(userColNames[4])%>',
                              '<%= userProp.getProperty(userColNames[5])%>'
],
                    colModel:[
                        {name:'<%= userColNames[0]%>',index:'<%= userColNames[0]%>',
                            width:120,sortable:true,editable:true,editrules:{required:true},formoptions:{rowpos:1, elmprefix:'*'}},
                        {name:'<%= userColNames[1]%>',index:'<%= userColNames[1]%>',
                            width:130,sortable:true,editable:true},
                        {name:'<%= userColNames[2]%>',index:'<%= userColNames[2]%>',
                            width:100,sortable:true,editable:true,editrules:{required:true},formoptions:{rowpos:3, elmprefix:'*'}},
                        {name:'<%= userColNames[3]%>',index:'<%= userColNames[3]%>',
                            width:180,sortable:true,editable:true,editrules:{email:true,required:true},formoptions:{rowpos:4, elmprefix:'*'}},
                        {name:'<%= userColNames[4]%>',index:'<%= userColNames[4]%>', 
                            width:100,sortable:true,editable:true},
                        {name:'<%= userColNames[5]%>',index:'<%= userColNames[5]%>', 
                            width:100,sortable:true,editable:true},
                    ],
                    pager: '#pager1',
                    rowNum:50,
                    height:'auto',
                    //rowList:[10,20,30],
                    loadonce: true,
                    sortname:'<%= userColNames[0]%>',
                    viewrecords: true,
                    editurl:'<%=request.getContextPath()%>/userJqGrid?q=1&action=addData&userCookie=<%= encodedCookie%>',
                    caption: 'User Grid',
                    ondblClickRow: function(rowid) {
                       $("#userList").jqGrid('editGridRow',rowid, userEditParam);
                        return;
                    }
                 });
$("#userList").jqGrid('navGrid',"#pager1",{add:true,edit:true,del:true});
$("#userList").jqGrid('gridResize', …