struts2类型转换

web.xml中要有以下条目

<context-param>        <param-name>datePattern</param-name>        <param-value>yyyy-MM-dd</param-value>    </context-param>

public class TypeConversionExample extends ActionSupport{private static final long serialVersionUID = 1L;private String name;private int rollNo;private double amount;private Date submissionDate;private String datePattern="yyyy-mm-dd";@Overridepublic String execute() throws Exception {// TODO Auto-generated method stubSystem.out.println(getSubmissionDate());System.out.println(submissionDate);return SUCCESS;}

TypeConversionExample-conversion.properties与上诉action类在同一个包中

submissionDate=net.roseindia.converter.DateConverterClazamount=net.roseindia.converter.CurrencyConverterClaz

同一个包中还有错误提示properties文件，见源代码。然后就是另一个包中的类型转换类：

public class DateConverterClaz extends DefaultTypeConverter {private Date convertedDate; public Date convertValue(Map context, Object object, Class type) {    System.out.println("Inside Date Converter");        if (type == Date.class) {        System.out.println("inside If Block");            String datePattern = "yyyy-MM-dd";            DateFormat format = new SimpleDateFormat(datePattern);            format.setLenient(false);            try {                String[] dateString = (String[]) object;                convertedDate = format.parse(dateString[0]);                System.out.println("Today "+convertedDate);                return convertedDate;            } catch (Exception e) {                e.toString();                throw new TypeConversionException("Given Date is Invalid");            }        }        return null;    }

public class CurrencyConverterClaz implements TypeConverter{StringBuilder stringBuilder;public String replace(String string, char character, String convert) {if (string == null) {return null;}int length = string.length();stringBuilder= new StringBuilder(string.length() * 2);for (int i = 0; i < length; i++) {char char2 = string.charAt(i);if (char2 == character) {stringBuilder.append(convert);} else {stringBuilder.append(char2);}}return stringBuilder.toString();}@Overridepublic Object convertValue(Map<String, Object> arg0, Object arg1,Member arg2, String arg3, Object value, Class type) {// TODO Auto-generated method stubif(value==null){return null;}else if(type==String.class){NumberFormat newCurrency = new DecimalFormat("#,##0.00");String formatedCurrency=newCurrency.format((Double) value);System.out.println(formatedCurrency);return formatedCurrency;}else if ( type == Double.TYPE  || type == Double.class) {String[] strings = (String[]) value;String doubleValue = strings[0];return Double.parseDouble(replace(doubleValue, ',', ""));}return null;}}

为了避免中文乱码,jsp页面要有

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%><%@ taglib prefix="s" uri="/struts-tags" %><meta http-equiv="Content-Type" content="text/html; charset=utf-8">

原文：http://www.roseindia.net/struts/struts/struts2.2.1/typeconversionexample.html

源代码：http://pan.baidu.com/share/link?shareid=356719023&uk=3878681452