在SpringMVC中，bean中定义了Date，double等类型，如果没有做任何处理的话，日期以及double都无法绑定。
解决的办法就是使用spring mvc提供的@InitBinder标签
在我的项目中是在BaseController中增加方法initBinder，并使用注解@InitBinder标注，那么spring mvc在绑定表单之前，都会先注册这些编辑器，当然你如果不嫌麻烦，你也可以单独的写在你的每一个controller中。剩下的控制器都继承该类。spring自己提供了大量的实现类，诸如CustomDateEditor ，CustomBooleanEditor，CustomNumberEditor等许多，基本上够用。
当然，我们也可以不使用他自己自带这些编辑器类，那下面我们自己去构造几个
- import org.springframework.beans.propertyeditors.PropertiesEditor;
- public class DoubleEditor extends PropertiesEditor {
- @Override
- public void setAsText(String text) throws IllegalArgumentException {
- if (text == null || text.equals("")) {
- text = "0";
- }
- setValue(Double.parseDouble(text));
- }
- @Override
- public String getAsText() {
- return getValue().toString();
- }
- }
- import org.springframework.beans.propertyeditors.PropertiesEditor;
- public class IntegerEditor extends PropertiesEditor {
- @Override
- public void setAsText(String text) throws IllegalArgumentException {
- if (text == null || text.equals("")) {
- text = "0";
- }
- setValue(Integer.parseInt(text));
- }
- @Override
- public String getAsText() {
- return getValue().toString();
- }
- }
- import org.springframework.beans.propertyeditors.PropertiesEditor;
- public class FloatEditor extends PropertiesEditor {
- @Override
- public void setAsText(String text) throws IllegalArgumentException {
- if (text == null || text.equals("")) {
- text = "0";
- }
- setValue(Float.parseFloat(text));
- }
- @Override
- public String getAsText() {
- return getValue().toString();
- }
- }
- import org.springframework.beans.propertyeditors.PropertiesEditor;
- public class LongEditor extends PropertiesEditor {
- @Override
- public void setAsText(String text) throws IllegalArgumentException {
- if (text == null || text.equals("")) {
- text = "0";
- }
- setValue(Long.parseLong(text));
- }
- @Override
- public String getAsText() {
- return getValue().toString();
- }
- }
在BaseController中
- @InitBinder
- protected void initBinder(WebDataBinder binder) {
- binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"), true));
- / binder.registerCustomEditor(int.class, new CustomNumberEditor(int.class, true));
- binder.registerCustomEditor(int.class, new IntegerEditor());
- / binder.registerCustomEditor(long.class, new CustomNumberEditor(long.class, true));
- binder.registerCustomEditor(long.class, new LongEditor());
- binder.registerCustomEditor(double.class, new DoubleEditor());
- binder.registerCustomEditor(float.class, new FloatEditor());
- }
- public class org.springframework.beans.propertyeditors.PropertiesEditor extends java.beans.PropertyEditorSupport {
