通过InitBinder注解,做到全局的格式化转换

首先自定义一个格式转换类(我们以Date格式为例)DateFormatEditor继承自PropertiesEditor：

 

import java.text.ParseException;
import java.text.SimpleDateFormat;
import org.springframework.beans.propertyeditors.PropertiesEditor;
 
public class DateFormatEditor extends PropertiesEditor {
    // 日期是否允许为空
    private boolean isAllowEmpty;
    // 日期格式
    private String pattern;
 
    public DateFormatEditor() {
        super();
        this.isAllowEmpty = true;
        this.pattern = "yyyy-MM-dd";
    }
 
    public DateFormatEditor(String pattern, boolean isAllowEmpty) {
        super();
        this.isAllowEmpty = isAllowEmpty;
        this.pattern = pattern;
    }
 
    public boolean isAllowEmpty() {
        return isAllowEmpty;
    }
 
    public void setAllowEmpty(boolean isAllowEmpty) {
        this.isAllowEmpty = isAllowEmpty;
    }
 
    public String getPattern() {
        return pattern;
    }
 
    public void setPattern(String pattern) {
        this.pattern = pattern;
    }
 
    @Override
    public void setAsText(String text) throws IllegalArgumentException {
        try {
            if (text != null && !text.equals("")) {
                SimpleDateFormat format = new SimpleDateFormat(pattern);
                setValue(format.parse(text));
            } else {
                if (isAllowEmpty) {
                    setValue(null);
                }
            }
        } catch (ParseException e) {
            System.out.println("格式转换失败！");
            setValue(null);
        }
    }
}

定义完了还是不能用,这里需要我们注册：

由于需要全局的格式化转换所以我们定义一个BaseController类：

import java.util.Date;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import spring.util.DateFormatEditor;
 
@Controller
public class BaseController {
    @Autowired
    protected HttpServletRequest request;
    @Autowired
    protected HttpServletResponse response;
    @Autowired
    protected HttpSession session;
    @Autowired
    protected ServletContext application;
 
    @InitBinder
    protected void initDate(WebDataBinder binder) {
        binder.registerCustomEditor(Date.class, new DateFormatEditor("yyyy-MM-dd hh:mm:ss", true));
    }
}

 

 

 

首先自定义一个格式转换类(我们以Date格式为例)DateFormatEditor继承自PropertiesEditor：

 

1.   import java.text.ParseException;
2.   import java.text.SimpleDateFormat;
3.   import org.springframework.beans.propertyeditors.PropertiesEditor;
4.    
5.   public class DateFormatEditor extends PropertiesEditor {
6.   // 日期是否允许为空
7.   private boolean isAllowEmpty;
8.   // 日期格式
9.   private String pattern;
10.    
11.   public DateFormatEditor() {
12.   super();
13.   this.isAllowEmpty = true;
14.   this.pattern = "yyyy-MM-dd";
15.   }
16.    
17.   public DateFormatEditor(String pattern, boolean isAllowEmpty) {
18.   super();
19.   this.isAllowEmpty = isAllowEmpty;
20.   this.pattern = pattern;
21.   }
22.    
23.   public boolean isAllowEmpty() {
24.   return isAllowEmpty;
25.   }
26.    
27.   public void setAllowEmpty(boolean isAllowEmpty) {
28.   this.isAllowEmpty = isAllowEmpty;
29.   }
30.    
31.   public String getPattern() {
32.   return pattern;
33.   }
34.    
35.   public void setPattern(String pattern) {
36.   this.pattern = pattern;
37.   }
38.    
39.   @Override
40.   public void setAsText(String text) throws IllegalArgumentException {
41.   try {
42.   if (text != null && !text.equals("")) {
43.   SimpleDateFormat format = new SimpleDateFormat(pattern);
44.   setValue(format.parse(text));
45.   } else {
46.   if (isAllowEmpty) {
47.   setValue(null);
48.   }
49.   }
50.   } catch (ParseException e) {
51.   System.out.println("格式转换失败！");
52.   setValue(null);
53.   }
54.   }
55.   }

定义完了还是不能用,这里需要我们注册：

由于需要全局的格式化转换所以我们定义一个BaseController类：

 

1.   import java.util.Date;
2.   import javax.servlet.ServletContext;
3.   import javax.servlet.http.HttpServletRequest;
4.   import javax.servlet.http.HttpServletResponse;
5.   import javax.servlet.http.HttpSession;
6.   import org.springframework.beans.factory.annotation.Autowired;
7.   import org.springframework.stereotype.Controller;
8.   import org.springframework.web.bind.WebDataBinder;
9.   import org.springframework.web.bind.annotation.InitBinder;
10.   import spring.util.DateFormatEditor;
11.    
12.   @Controller
13.   public class BaseController {
14.   @Autowired
15.   protected HttpServletRequest request;
16.   @Autowired
17.   protected HttpServletResponse response;
18.   @Autowired
19.   protected HttpSession session;
20.   @Autowired
21.   protected ServletContext application;
22.    
23.   @InitBinder
24.   protected void initDate(WebDataBinder binder) {
25.   binder.registerCustomEditor(Date.class, new DateFormatEditor("yyyy-MM-dd hh:mm:ss", true));
26.   }
27.   }

这样就把所有Date类型的参数全部拦截下来进行判断和格式化。