Hibernate Validator を使ったバリデーション

BeansValidator.java

public class BeansValidator {
    
    private ClassValidator classValidator;
    private List<String> validMessages = new ArrayList<String>();
    
    private BeansValidator() {}
    
    public BeansValidator(Class clazz) throws Exception{ 
        classValidator = new ClassValidator(clazz);
        
        // ルールが設定されていなければ例外を発生して通知
        if (!classValidator.hasValidationRules()){
            throw new Exception();// とりあえずで、NotFoundValidationRulesExceptionとか？
        }
        
    }
    
    public Boolean validate(Object obj) {
        validMessages.clear();
       
        for (InvalidValue value : classValidator.getInvalidValues(obj)) {
            String message = MessageFormat.format("{0}:{1}", 
                                                  value.getValue(), 
                                                  value.getMessage());
            validMessages.add(message);
        }
        
        return validMessages.isEmpty();
    }

    /**
     * @return the validMessages
     */
    public List<String> getValidMessages() {
        return validMessages;
    }
    
}

Usage.java

import org.hibernate.validator.ClassValidator;
import org.hibernate.validator.InvalidValue;


ValidBeans validBeans = new ValidBeans();

validBeans.setStringNull(null);
validBeans.setLengthOver("12345678901");
validBeans.setLengthUnder("0123");
validBeans.setValueNull(null);
validBeans.setValueOver(101);
validBeans.setValueUnder(99);

try {
    BeansValidator validator = new BeansValidator(ValidBeans.class);
    if (!validator.validate(validBeans)) {
        for (String message : validator.getValidMessages()) {
            System.out.println(message);
        }
    }
} catch (Exception e) {
    // 例外処理
}        

ValidBeans.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Develop;

import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import org.hibernate.validator.Length;
import org.hibernate.validator.Max;
import org.hibernate.validator.Min;
import org.hibernate.validator.NotNull;

/**
 *
 * @author xnrghzjh
 */
public class ValidBeans{

    @Id
    @GeneratedValue (strategy=GenerationType.AUTO)
    @Column(name="Key")
    private Integer key;
    
    @NotNull(message="空文字列は入力できません")
    @Column(name="stringNull")
    private String stringNull;
    
    @Length(min=0, max=10, message="文字列が長すぎます")
    @Column(name="LengthOver")
    private String lengthOver;
    
    @Length(min=10, max=15, message="文字列が短すぎます")
    @Column(name="LengthUnder")
    private String lengthUnder;
    
    
    @NotNull(message="値を入力してください")
    @Column(name="ValueNull")
    private Integer valueNull;

    @Max(value=100, message="数値が大きすぎます")
    @Column(name="ValueOver")
    private Integer valueOver;
    
    @Min(value=100, message="数値が小さすぎます")
    @Column(name="ValueUnder")
    private Integer valueUnder;

    /**
     * @return the key
     */
    public Integer getKey() {
        return key;
    }

    /**
     * @param key the key to set
     */
    public void setKey(Integer key) {
        this.key = key;
    }

    /**
     * @return the stringNull
     */
    public String getStringNull() {
        return stringNull;
    }

    /**
     * @param stringNull the stringNull to set
     */
    public void setStringNull(String stringNull) {
        this.stringNull = stringNull;
    }

    /**
     * @return the lengthOver
     */
    public String getLengthOver() {
        return lengthOver;
    }

    /**
     * @param lengthOver the lengthOver to set
     */
    public void setLengthOver(String lengthOver) {
        this.lengthOver = lengthOver;
    }

    /**
     * @return the lengthUnder
     */
    public String getLengthUnder() {
        return lengthUnder;
    }

    /**
     * @param lengthUnder the lengthUnder to set
     */
    public void setLengthUnder(String lengthUnder) {
        this.lengthUnder = lengthUnder;
    }

    /**
     * @return the valueNull
     */
    public Integer getValueNull() {
        return valueNull;
    }

    /**
     * @param valueNull the valueNull to set
     */
    public void setValueNull(Integer valueNull) {
        this.valueNull = valueNull;
    }

    /**
     * @return the valueOver
     */
    public Integer getValueOver() {
        return valueOver;
    }

    /**
     * @param valueOver the valueOver to set
     */
    public void setValueOver(Integer valueOver) {
        this.valueOver = valueOver;
    }

    /**
     * @return the valueUnder
     */
    public Integer getValueUnder() {
        return valueUnder;
    }

    /**
     * @param valueUnder the valueUnder to set
     */
    public void setValueUnder(Integer valueUnder) {
        this.valueUnder = valueUnder;
    }
    
}

実行結果

null:空文字列は入力できません
12345678901:文字列が長すぎます
0123:文字列が短すぎます
null:値を入力してください
101:数値が大きすぎます
99:数値が小さすぎます