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
[java] view plain copy 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(); } } [java] view plain copy 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(); } } [java] view plain copy 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(); } } [java] view plain copy 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
[java] view plain copy @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()); }
[java] view plain copy public class org.springframework.beans.propertyeditors.PropertiesEditor extends java.beans.PropertyEditorSupport { 看到没？如果你的编辑器类直接继承PropertyEditorSupport也可以。
