@Valid Date 日期全局的格式化转换

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。