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  • 吴裕雄--天生自然轻量级JAVA EE企业应用开发Struts2Sping4Hibernate整合开发学习笔记：Struts2的类型转换：处理集合属性的转换错误

    <?xml version="1.0" encoding="GBK"?>
<project name="struts" basedir="." default="">
    <property name="dist" value="classes"/>
    <property name="src" value="src"/>
    
    <path id="classpath">
        <fileset dir="lib">
            <include name="*.jar"/>
        </fileset>
        <pathelement path="${dist}"/>
    </path>

    <target name="compile" description="Compile all source code">
        <delete dir="${dist}"/>
        <mkdir dir="${dist}"/>
        <copy todir="${dist}">
            <fileset dir="${src}">
                <exclude name="**/*.java"/>
            </fileset>        
        </copy>
        <javac destdir="classes" debug="true" includeantruntime="yes"
            deprecation="false" optimize="false" failonerror="true">
            <src path="${src}"/>
            <classpath refid="classpath"/>
        </javac>
    </target>

</project>
    <?xml version="1.0" encoding="GBK"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
    http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
    <!-- 定义Struts 2的核心Filter -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <!-- 让Struts 2的核心Filter拦截所有请求 -->
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>
    xwork.default.invalid.fieldvalue={0}字段类型转换失败！
    xwork.default.invalid.fieldvalue={0}u5b57u6bb5u7c7bu578bu8f6cu6362u5931u8d25uff01
    <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
    
<struts>

    <constant name="struts.custom.i18n.resources" value="mess"/>
    <constant name="struts.i18n.encoding" value="GBK"/>

    <package name="conversion" extends="struts-default">

        <action name="login" class="org.crazyit.app.action.LoginAction">
            <result>/WEB-INF/content/welcome.jsp</result>
            <result name="error">/WEB-INF/content/welcome.jsp</result>
            <result name="input">/WEB-INF/content/ognlInput.jsp</result>
        </action>
        <action name="*">
            <result>/WEB-INF/content/{1}.jsp</result>    
        </action>        
    </package>
</struts>    
    org.crazyit.app.domain.User=org.crazyit.app.converter.UserConverter
    <%--
网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
author  yeeku.H.lee kongyeeku@163.com
version  1.0
Copyright (C), 2001-2016, yeeku.H.Lee
This program is protected by copyright laws.
Program Name:
Date: 
--%>

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>类型转换的错误处理</title>
    <s:head/>
</head>
<body>
<s:fielderror />
<h3>类型转换的错误处理</h3>
<s:form action="login">
    <s:iterator value="{0, 1, 2}" status="stat">
        <!-- 只有一个请求参数 -->
        <s:textfield name="users" 
            label="第%{#stat.index}个用户信息"/>
    </s:iterator>
    <tr>
        <td colspan="2"><s:submit value="转换" theme="simple"/>
        <s:reset value="重填" theme="simple"/></td>
    </tr>
</s:form>
</body>
</html>
    <%--
网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
author  yeeku.H.lee kongyeeku@163.com
version  1.0
Copyright (C), 2001-2016, yeeku.H.Lee
This program is protected by copyright laws.
Program Name:
Date: 
--%>

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>类型转换的错误处理</title>
    <s:head/>
</head>
<body>
<s:fielderror />
<h3>类型转换的错误处理</h3>
<s:form action="login">
    <s:iterator value="{0, 1, 2}" status="stat">
        <!-- 将会依次生成多个请求参数 -->
        <s:textfield name="users[%{#stat.index}]" 
            label="第%{#stat.index}个用户信息"/>
    </s:iterator>
    <tr>
        <td colspan="2"><s:submit value="转换" theme="simple"/>
        <s:reset value="重填" theme="simple"/></td>
    </tr>
</s:form>
</body>
</html>
    <%--
网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
author  yeeku.H.lee kongyeeku@163.com
version  1.0
Copyright (C), 2001-2016, yeeku.H.Lee
This program is protected by copyright laws.
Program Name:
Date: 
--%>

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>转换结果</title>
</head>
<body>
    转换结果!<br/>
    <s:iterator value="users" status="status">
        用户<s:property value="%{#status.index}"/>的用户名：<s:property value="name"/><br/>
        用户<s:property value="%{#status.index}"/>的密码：<s:property value="pass"/><br/>
    </s:iterator>
</body>
</html>
    xwork.default.invalid.fieldvalue={0}字段类型转换失败！
    xwork.default.invalid.fieldvalue={0}u5b57u6bb5u7c7bu578bu8f6cu6362u5931u8d25uff01
    <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
    
<struts>

    <constant name="struts.custom.i18n.resources" value="mess"/>
    <constant name="struts.i18n.encoding" value="GBK"/>

    <package name="conversion" extends="struts-default">

        <action name="login" class="org.crazyit.app.action.LoginAction">
            <result>/WEB-INF/content/welcome.jsp</result>
            <result name="error">/WEB-INF/content/welcome.jsp</result>
            <result name="input">/WEB-INF/content/ognlInput.jsp</result>
        </action>
        <action name="*">
            <result>/WEB-INF/content/{1}.jsp</result>    
        </action>        
    </package>
</struts>    
    org.crazyit.app.domain.User=org.crazyit.app.converter.UserConverter
    package org.crazyit.app.action;

import com.opensymphony.xwork2.Action;
import java.util.Date;
import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

import org.crazyit.app.domain.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class LoginAction extends ActionSupport
{
    private List<User> users;
    // users的setter和getter方法
    public void setUsers(List<User> users)
    {
        this.users = users;
    }
    public List<User> getUsers()
    {
        return users;
    }
}
    package org.crazyit.app.converter;

import java.util.Map;
import org.apache.struts2.util.*;

import org.crazyit.app.domain.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class UserConverter extends StrutsTypeConverter
{
    // 实现将字符串类型转换成复合类型的方法
    public Object convertFromString(Map context
        , String[] values , Class toClass)
    {
        // 创建一个User实例
        User user = new User();
        // 只处理请求参数数组第一个数组元素，
        // 并将该字符串以英文逗号分割成两个字符串
        String[] userValues = values[0].split(",");
        // 为User实例赋值
        user.setName(userValues[0]);
        user.setPass(userValues[1]);
        // 返回转换来的User实例
        return user;
    }
    // 实现将复合类型转换成字符串类型的方法
    public String convertToString(Map context, Object o)
    {
        // 将需要转换的值强制类型转换为User实例
        User user = (User) o;
        return "<" + user.getName() + ","
            + user.getPass() + ">";
    }
}
    package org.crazyit.app.domain;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class User
{
    private String name;
    private String pass;

    // name的setter和getter方法
    public void setName(String name)
    {
        this.name = name;
    }
    public String getName()
    {
        return this.name;
    }

    // pass的setter和getter方法
    public void setPass(String pass)
    {
        this.pass = pass;
    }
    public String getPass()
    {
        return this.pass;
    }
}
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  • 原文地址：https://www.cnblogs.com/tszr/p/12364870.html
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