springMVC的一些工具类

Posted 2020-06-14

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springMVC的一些工具类，主要有转换器，读取器

读取文件：

package cn.edu.hbcf.common.springmvc;

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;


public class CustomizedPropertyConfigurer extends PropertyPlaceholderConfigurer{

    private static Map<String, Object> ctxPropertiesMap; 
    
    @Override 
    protected void processProperties( 
            ConfigurableListableBeanFactory beanFactoryToProcess, 
            Properties props) throws BeansException { 
        super.processProperties(beanFactoryToProcess, props); 
        ctxPropertiesMap = new HashMap<String, Object>(); 
        for (Object key : props.keySet()) { 
            String keyStr = key.toString(); 
            String value = props.getProperty(keyStr); 
            ctxPropertiesMap.put(keyStr, value); 
        }   
        
    } 

 
    public static Object getContextProperty(String name) { 
        return ctxPropertiesMap.get(name); 
    }
}

springMVC中日期转换：

package cn.edu.hbcf.common.springmvc;

import java.beans.PropertyEditorSupport;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;

import org.apache.commons.lang.StringUtils;
 
/**
 * spring中日期转换
 * 
 * <pre>
 * &#064;InitBinder
 * public void initBinder(WebDataBinder binder) {
 *     binder.registerCustomEditor(Date.class, new DateConvertEditor());
 *     // binder.registerCustomEditor(Date.class, new
 *     // DateConvertEditor(&quot;yyyy-MM-dd&quot;));
 *     binder.registerCustomEditor(String.class, new StringTrimmerEditor(true));
 * }
 * </pre>
 * 
 * 
 * @author LiPenghui
 * @date 2011-8-10 下午1:48:37
 */
public class DateConvertEditor extends PropertyEditorSupport{
    private DateFormat format;
    
    public DateConvertEditor(){
        this.format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    }
    
    public DateConvertEditor(String format){
        this.format=new SimpleDateFormat(format);
    }
    
    /** Date-->String **/
    public String getAsText(){
        if(getValue()==null){
            return "";
        }
        return this.format.format(getValue());
    }
    
    /** String-->Date **/
    public void setAsText(String text){
        if(!StringUtils.isNotBlank(text)){
            setValue(null);
        }else{
            try {
                setValue(this.format.parse(text));
            } catch (ParseException e) {
                throw new IllegalArgumentException("不能被转换的日期字符串，请检查!", e);
            }
        }
    }
}

日期另一个转换器（暂时没用到）

package cn.edu.hbcf.common.springmvc;

import java.text.ParseException;
import java.util.Date;

import org.springframework.core.convert.converter.Converter;

import cn.edu.hbcf.common.utils.DateUtils;

public class DateCovertor  implements Converter<String,Date>{

    @Override
    public Date convert(String date) {
        if(date != null){
            try {
                return DateUtils.convertStringToDate(date, "yyyy-MM-dd HH:mm:ss");
                
            } catch (ParseException e) {
                try {
                    return DateUtils.convertStringToDate(date, "yyyy-MM-dd");
                } catch (ParseException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
        }
        return null;
    }
}

int类型转换器：

package cn.edu.hbcf.common.springmvc;

import java.beans.PropertyEditorSupport;

import org.springframework.util.StringUtils;
 
/**
 * 
 * @author QQ int 2012-5-30 类型转换器
 * 
 */
public class IntegerConvertEditor extends PropertyEditorSupport {
    @Override
    public void setAsText(String text) throws IllegalArgumentException {
        if (text == null || text.equals("")) {
            text = "0";
        }

        if (!StringUtils.hasText(text)) {
            setValue(null);
        } else {
            setValue(Integer.parseInt(text));// 这句话是最重要的，他的目的是通过传入参数的类型来匹配相应的databind
        }
    }

    /**
     * Format the Date as String, using the specified DateFormat.
     */
    @Override
    public String getAsText() {

        return getValue().toString();
    }
}

integer转换器：

package cn.edu.hbcf.common.springmvc;

import org.springframework.core.convert.converter.Converter;
import org.springframework.util.StringUtils;

/**
 * Integer转换器
 * @author qiangqiang
 *
 */
public class IntegerConvertor implements Converter<String,Integer>{

    @Override
    public Integer convert(String s) {
        if("".equals(s)){
            return 0;
        }
    
        else if (StringUtils.hasText(s)) {
            return Integer.parseInt(s);
        }
        return null;
        
    }

}

接收异常，暂时没用到

package cn.edu.hbcf.common.springmvc;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;


public class MyHandlerExceptionResolver implements HandlerExceptionResolver {

    @Override
    public ModelAndView resolveException(HttpServletRequest arg0,
            HttpServletResponse arg1, Object arg2, Exception arg3) {
        // TODO Auto-generated method stub
        return null;
    }



}

不知道干嘛用的：

package cn.edu.hbcf.common.springmvc;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.multipart.commons.CommonsMultipartResolver;

/** 
 * @author 帐前卒 
 */
public class MyMultipartResolver extends CommonsMultipartResolver {
    private String excludeUrls;
    private String[] excludeUrlArray;

    public String getExcludeUrls() {
        return excludeUrls;
    }

    public void setExcludeUrls(String excludeUrls) {
        this.excludeUrls = excludeUrls;
        this.excludeUrlArray = excludeUrls.split(",");
    }

    /** 
     * 这里是处理Multipart http的方法。如果这个返回值为true,那么Multipart http body就会MyMultipartResolver 消耗掉.如果这里返回false 
     * 那么就会交给后面的自己写的处理函数处理例如刚才ServletFileUpload 所在的函数 
     * @see org.springframework.web.multipart.commons.CommonsMultipartResolver#isMultipart(javax.servlet.http.HttpServletRequest) 
     */
    @Override
    public boolean isMultipart(HttpServletRequest request) {
        for (String url : excludeUrlArray) {
            // 这里可以自己换判断  
            if (request.getRequestURI().contains(url)) {
                return false;
            }
        }

        return super.isMultipart(request);
    }
}

总体类，和springMVC配置中对应：

package cn.edu.hbcf.common.springmvc;

import java.util.Date;

import org.springframework.beans.propertyeditors.StringTrimmerEditor;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.support.WebBindingInitializer;
import org.springframework.web.context.request.WebRequest;

public class MyWebBindingInitializer implements WebBindingInitializer {

    public void initBinder(WebDataBinder binder, WebRequest request) {

        binder.registerCustomEditor(Date.class, new DateConvertEditor("yyyy-MM-dd"));

        binder
                .registerCustomEditor(String.class, new StringTrimmerEditor(
                        false));
        binder.registerCustomEditor(int.class, new IntegerConvertEditor());
        
        binder.registerCustomEditor(String[].class, new StringArrayConvertEditor());
       
    } 
}

以静态变量保存Spring Application，可以在任何代码任何地方任何时候取出ApplicationContext

package cn.edu.hbcf.common.springmvc;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * 以静态变量保存Spring Application， 可以在任何代码任何地方任何时候取出ApplicationContext
 * 
 * @author LiPenghui
 * 
 */
public class SpringContextHolder implements ApplicationContextAware {
 
    private static ApplicationContext applicationContext;
    
    private static Logger logger = LoggerFactory.getLogger(SpringContextHolder.class);
    /**
     * 实现ApplicationContextAware接口的context注入函数，将其存入静态变量
     */
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        SpringContextHolder.applicationContext = applicationContext;
        logger.debug("SpringContextHolder注入ApplicationContext");
    }

    /**
     * 获取存储在静态变量中的ApplicationContext
     * 
     * @return
     */
    public static ApplicationContext getApplicationContext() {
        checkApplicationContext();
        return applicationContext;
    }

    /**
     * 从静态变量ApplicationContext中获取Bean，自动转型为所赋值对象的类型
     * @param <T>
     * @param name
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name){
        checkApplicationContext();
        return (T) applicationContext.getBean(name);
    }
    
    @SuppressWarnings("unchecked")
    public static <T> T getBean(Class<T> clazz){
        checkApplicationContext();
        return (T) applicationContext.getBeansOfType(clazz);
    }
    /**
     * 清除ApplicationContext静态变量.
     */
    public static void cleanApplicationContext(){
        applicationContext=null;
    }
    /**
     * 检查是否获取到了ApplicationContext
     */
    private static void checkApplicationContext() {
        if (applicationContext == null) {
            throw new IllegalStateException(
                    "applicationContext未注入,请在applicationContext.xml中定义SpringContextHolder");
        }
    }
}

string数组转换：

package cn.edu.hbcf.common.springmvc;

import java.beans.PropertyEditorSupport;

import org.springframework.util.StringUtils;

public class StringArrayConvertEditor extends PropertyEditorSupport {
    
    
    @Override
    public void setAsText(String text) throws IllegalArgumentException {
        if (text == null || text.equals("")) {
            text = "";
        }

        if (!StringUtils.hasText(text)) {
            setValue(null);
        } else {
            setValue(text);// 这句话是最重要的，他的目的是通过传入参数的类型来匹配相应的databind
        }
    }

    /**
     * Format the Date as String, using the specified DateFormat.
     */
    @Override
    public String getAsText() {

        return getValue().toString();
    }
    

}

StringConerter

package cn.edu.hbcf.common.springmvc;

import org.springframework.core.convert.converter.Converter;

public class StringConerter implements Converter<String,String>{

    @Override
    public String convert(String source) {
        if(source != null){
            return source.trim();
        }
        return null;
    }

}

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