JSP Custom Select Tag Dictionary table data __javase/javaee

In the development process, it is often used repeatedly in the Select Load Dictionary table data, such as loading jobs, education and so on, each time to use a separate acquisition and then traverse the front end will be cumbersome, and inconsistent with development principles. Therefore, you can encapsulate it by customizing the label. Examples are as follows:

Ynbytag.tld

<?xml version= "1.0" encoding= "UTF-8"?> <taglib xmlns= "Http://java.sun.com/xml/ns/javaee" xmlns:xsi= "HTT" P://www.w3.org/2001/xmlschema-instance "xsi:schemalocation=" Http://java.sun.com/xml/ns/javaee http:// Java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd "version=" 2.1 "> <description>ynbyUniform Custom Label</description> <display-name>ynby core</display-name> <tlib-version>1.1</tlib-version&
    Gt <short-name>ynby</short-name> <tag> <name>demo</name> <tag-class> Com.rdpm.sysm.service.taglib.demotag</tag-class> <body-content>empty</body-content> </tag > <tag> <!--define the name of the property. The attribute name must be unique for each label. --> <name>selectTag</name> <tag-class>com.rdpm.sysm.service.taglib.dictselecttag</
            Tag-class> <body-content>empty</body-content> <!--system code--> <attribute> <name>systemCode</name> <!--Specify whether the property is mandatory or optional, if set to false as optional. --> <required>true</required> <!--declares that the Label property is valid when an expression is run. --> <rtexprvalue>true</rtexprvalue> </attribute> <!--Select's name value--&G
      T  <attribute> <name>selectName</name> <!--Specify whether the property is mandatory or optional, if set to false as optional. --> <required>true</required> <!--declares that the Label property is valid when an expression is run.
        --> <rtexprvalue>true</rtexprvalue> </attribute> <!--value selected-->
            <attribute> <name>value</name> <required>false</required> <rtexprvalue>true</rtexprvalue> </attribute> <!--default selected value--> <a
            Ttribute> <name>selectedValue</name> <required>false</required> <rtexprvalue>true</rtexprvalue> </attribute> <!--The method that is triggered when selecting any item--> <
            Attribute> <name>onChange</name> <required>false</required> <rtexprvalue>true</rtexprvalue>;/attribute> <!--selection mode Radio/multiple selection--> <attribute> <name>multiple</name> <required>false</required> <rtexprvalue>true</rtexprvalue> </attr Ibute> <!--Select is not selected when the display content such as: "Please select" or "All"--> <attribute> &LT;NAME&GT;NULLNAME&L
        T;/name> <required>false</required> <rtexprvalue>true</rtexprvalue> </attribute> <!--Select the location at the top or bottom of the selection when--> <attribute> <name&gt ;nullnameplace</name> <required>false</required> <rtexprvalue>true</rte Xprvalue> </attribute> <!--have the next level--> <attribute> <name>hasn Ext</name> <required>false</required> <rtexprvalue>true</rtexprvalue&gt
        ; </attribute> <!--superior id--> <attribute> <name>parentId</name> <re
        Quired>false</required> <rtexprvalue>true</rtexprvalue> </attribute> <!--additional display layer parameters--> <!--style class--> <attribute> <name>cssclass</name&gt
            ;
        <required>false</required> <rtexprvalue>true</rtexprvalue> </attribute> <!--inline style--> <attribute> <name>styleClass</name> <requir ed>false</required> <rtexprvalue>true</rtexprvalue> </attribute> </t
 Ag> </taglib>

Dictselecttag.java

Package com.rdpm.sysm.service.taglib;
Import Com.rdpm.sysm.dao.BaseParameterMapper;
Import Com.rdpm.sysm.entity.BaseParameter;
Import Com.rdpm.sysm.util.SpringContextUtil;
Import Org.apache.commons.lang3.StringUtils;
Import org.springframework.beans.factory.annotation.Autowired;
Import Org.springframework.context.ApplicationContext;

Import Org.springframework.stereotype.Service;
Import Javax.annotation.Resource;
Import javax.servlet.jsp.JspException;
Import Javax.servlet.jsp.JspWriter;
Import Javax.servlet.jsp.tagext.TagSupport;
Import java.io.IOException;

Import java.util.List;
 /** * Created by XJM on 2016-07-12. */public class Dictselecttag extends TagSupport {//extra some display layer parameters private StringCssClass;//Style class private StringStyleClass;//inline style private StringSystemcode;//Parameter system code private StringSelectname;//select's name value is private StringNullname;//Prompt message option when not selected private Stringvalue;/The value selected is private StringSelectedValue;/The value selected is private StringOnChange;//The method called when changing private Stringmultiple//Select multiple selection/radio @Override public int Doendtag () throws Jspexception {

Springcontextutil at the bottom baseparametermapper baseparametermapper= (baseparametermapper) SpringContextUtil.getBean (
        "Baseparametermapper"); List<baseparameter> list= Baseparametermapper.selectparambyparamtypecode (Systemcode);
        StringBuffer sb = new StringBuffer (); JspWriter out =PageContext. Getout ();
        Sb.append ("<select name=\" "+this.getselectname () +" "); if (!
        Stringutils.isempty (This.getcssclass ())) {Sb.append ("class=\" "+ this.getcssclass () +" "); } if (!
        Stringutils.isempty (This.getstyleclass ())) {Sb.append ("style=\" "+ this.getstyleclass () +" "); } if (!
        Stringutils.isempty (This.getmultiple ())) {Sb.append ("multiple=\" "+ this.getmultiple () +" "); } if (!
        Stringutils.isempty (This.getonchange ())) {Sb.append ("onchange=\" "+ this.getonchange () +" ");

        } sb.append (">"); if (! Stringutils.isempty (This.getnullname ())) {Sb.append ("<option value=\" \ ">--" +this.getnullname () + "--</o
        Ption> ");
                for (Baseparameter dc:list) {if (Dc.getdictvalue (). Equals (This.getselectedvalue ())) {
            Sb.append ("<option value=\" "+dc.getdictvalue () +" \ "selected>");
      }else {          Sb.append ("<option value=\" "+dc.getdictvalue () +" ">");
        } sb.append (Dc.getdictname () + "</option>");
        } sb.append ("</select>");
        try {out.write (sb.tostring ());  catch (IOException e) {//TODO auto-generated Catch block throw new Jspexception (e); Return TagSupport.Eval_page; Public String Getcssclass () {returnCssClass; } public void Setcssclass (String cssClass) {this.CssClass= CssClass; Public String Getstyleclass () {returnStyleClass; } public void Setstyleclass (String styleClass) {this.StyleClass= StyleClass; Public String Getsystemcode () {returnSystemcode; } public void Setsystemcode (String systemcode) {this.Systemcode= Systemcode; Public String Getselectname () {returnSelectname; } public void Setselectname (String selectname) {this.Selectname= Selectname; Public String Getnullname () {returnNullname; } public void Setnullname (STR