Struts2的类型转换之全局类型转换

逃离我推掉我的手 2022-06-07 14:10 259阅读 0赞

# struts2的类型转换 #

意义：对于一个成熟的、智能的MVC框架而言，不可避免要实现类型转换。B/S结构应用请求参数是通过浏览器发送到服务器的，这些参数不可能有丰富的数据类型，因此必须在服务器端完成数据类型转换。

对于struts2有局部和全局的类型转换。

如何写：类型转换器需要继承StrutsTypeConverter方法，并重写其中的方法。

全局类型转换：需要创建一个xwork-conversion.properties文件，

该文件由多个“复合类型=对应的类型转换器”

一旦注册了上面的全局类型转换器，该全局类型转换器就会对所有的类型属性起作用。

写view界面：

写Model：

1、

package com.zmy.bean;
    
    public class Address {
    
    	private String province;
    	private String city;
    	private String zone;
    	private String street;
    	
    	public String getZone() {
    		return zone;
    	}
    	public void setZone(String zone) {
    		this.zone = zone;
    	}
    	public String getProvince() {
    		return province;
    	}
    	public void setProvince(String province) {
    		this.province = province;
    	}
    	public String getCity() {
    		return city;
    	}
    	public void setCity(String city) {
    		this.city = city;
    	}
    	public String getStreet() {
    		return street;
    	}
    	public void setStreet(String street) {
    		this.street = street;
    	}
    	public Address(String province, String city, String zone, String street) {
    		super();
    		this.province = province;
    		this.city = city;
    		this.zone = zone;
    		this.street = street;
    	}
    	public Address() {
    		super();
    	}
    }

2、

package com.zmy.bean;
    
    public class UserDetailsAddress {
    	private String username;
    	private Address address;
        public String getUsername() {
    		return username;
    	}
    	public void setUsername(String username) {
    		this.username = username;
    	}
    	public Address getAddress() {
    		return address;
    	}
    	public void setAddress(Address address) {
    		this.address = address;
    	}
    	public UserDetailsAddress(String username, Address address) {
    		super();
    		this.username = username;
    		this.address = address;
    	}
    	public UserDetailsAddress() {
    		super();
    	}
    }

写Action

package com.zmy.action;
    
    import com.opensymphony.xwork2.ActionSupport;
    import com.zmy.bean.UserDetailsAddress;
    
    @SuppressWarnings("serial")
    public class AddressAction extends ActionSupport {
    		private UserDetailsAddress usDeAd;
    
    		public UserDetailsAddress getUsDeAd() {
    			return usDeAd;
    		}
    
    		public void setUsDeAd(UserDetailsAddress usDeAd) {
    			this.usDeAd = usDeAd;
    		}
    		@Override
    		public String execute() throws Exception {
    		// TODO Auto-generated method stub
    			System.out.print(usDeAd.getUsername());
    		return SUCCESS;
    		}
    }

写转换器

package com.zmy.conver;
    
    import java.util.Map;
    
    import org.apache.struts2.util.StrutsTypeConverter;
    
    import com.zmy.bean.Address;
    
    public class AddressTypeConverter extends StrutsTypeConverter {
    
    	@Override
    	public Object convertFromString(Map content, String[] values, Class toClass) {
    		// TODO Auto-generated method stub
    		if(toClass.equals(com.zmy.bean.Address.class)){
    			String province=values[0];
    			String city=values[1];
    			String onze=values[2];
    			String street=values[3];
    			Address address=new Address(province,city,onze,street);
    			return address;
    		}
    		return null;
    	}
    
    	@Override
    	public String convertToString(Map arg0, Object arg1) {
    		// TODO Auto-generated method stub
    		return null;
    	}
    
    }

写xwork-conversion.properties

com.zmy.bean.Address=com.zmy.conver.AddressTypeConverter

这样一个全局类型转换就写好了