如何验证服务器端动态生成的字段
我已经使用Spring 3.1开发了一个Web应用程序
在模块之一中，我需要保存一个具有许多OperationParameter对象的Operation对象。因此，在视图中，我提供了添加按钮，供用户为特定操作创建OperationParameters。
这两个模型都具有hibernate映射，并且Operation和OperationParameter之间存在一对多的关系。在Operation模型中，我有一个OperationParameters列表，当用户使用动态添加的OperationParameters创建新的Operation时，该列表将插入数据库中。
当我不使用验证时，它可以正常工作。当我为Operation模型插入操作时，OperationParameters的列表也将插入到OperationParameter表中。
我的问题是，如何对OperationParameter字段进行服务器端" title="服务器端">服务器端验证？如果验证完成后出现错误，那么如何显示特定OperationParameter字段的错误？
package com.abcprocure.servicerepo.model;// Generated Feb 9, 2012 11:30:06 AM by Hibernate Tools 3.2.1.GA
import java.util.ArrayList;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import org.apache.commons.collections.FactoryUtils;
import org.apache.commons.collections.list.LazyList;
@Entity
@Table(name="Operations"
,schema="dbo"
)
public class Operations implements java.io.Serializable {
private int operationId;
@Embedded
private Services services;
private String operationName;
private String isHqlsql;
private String isMultipleTables;
private String listOfTablesAffected;
private String hqlQuery;
private String typeOfOperation;
private String operationDetail;
private String inputVariables;
private String outputparamdatatype;
private String isCountQuery;
private String isDynamicWhereQry;
private String isPaginationRequired;
private String biInputParameters;
private List<OperationParameters> operationParameterses = LazyList
.decorate(new ArrayList<OperationParameters>(),
FactoryUtils.instantiateFactory(OperationParameters.class));
public Operations() {
}
public Operations(int operationId, Services services, String operationName) {
this.operationId = operationId;
this.services = services;
this.operationName = operationName;
}
public Operations(int operationId, Services services, String operationName, String isHqlsql, String isMultipleTables, String listOfTablesAffected, String hqlQuery, String typeOfOperation, String operationDetail, String inputVariables, String outputparamdatatype, String isCountQuery, List operationParameterses) {
this.operationId = operationId;
this.services = services;
this.operationName = operationName;
this.isHqlsql = isHqlsql;
this.isMultipleTables = isMultipleTables;
this.listOfTablesAffected = listOfTablesAffected;
this.hqlQuery = hqlQuery;
this.typeOfOperation = typeOfOperation;
this.operationDetail = operationDetail;
this.inputVariables = inputVariables;
this.outputparamdatatype = outputparamdatatype;
this.isCountQuery = isCountQuery;
this.operationParameterses = operationParameterses;
}
@Id
@GeneratedValue
@Column(name="operationId", unique=true, nullable=false)
public int getOperationId() {
return this.operationId;
}
public void setOperationId(int operationId) {
this.operationId = operationId;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="serviceId", nullable=false)
public Services getServices() {
return this.services;
}
public void setServices(Services services) {
this.services = services;
}
@Column(name="operationName", nullable=false, length=250)
public String getOperationName() {
return this.operationName;
}
public void setOperationName(String operationName) {
this.operationName = operationName;
}
@Column(name="isHQLSQL", length=50)
public String getIsHqlsql() {
return this.isHqlsql;
}
public void setIsHqlsql(String isHqlsql) {
this.isHqlsql = isHqlsql;
}
@Column(name="isMultipleTables", length=50)
public String getIsMultipleTables() {
return this.isMultipleTables;
}
public void setIsMultipleTables(String isMultipleTables) {
this.isMultipleTables = isMultipleTables;
}
@Column(name="listOfTablesAffected", length=500)
public String getListOfTablesAffected() {
return this.listOfTablesAffected;
}
public void setListOfTablesAffected(String listOfTablesAffected) {
this.listOfTablesAffected = listOfTablesAffected;
}
@Column(name="hqlQuery")
public String getHqlQuery() {
return this.hqlQuery;
}
public void setHqlQuery(String hqlQuery) {
this.hqlQuery = hqlQuery;
}
@Column(name="typeOfOperation", length=50)
public String getTypeOfOperation() {
return this.typeOfOperation;
}
public void setTypeOfOperation(String typeOfOperation) {
this.typeOfOperation = typeOfOperation;
}
@Column(name="operationDetail")
public String getOperationDetail() {
return this.operationDetail;
}
public void setOperationDetail(String operationDetail) {
this.operationDetail = operationDetail;
}
@Column(name="inputVariables", length=5000)
public String getInputVariables() {
return this.inputVariables;
}
public void setInputVariables(String inputVariables) {
this.inputVariables = inputVariables;
}
@Column(name="outputparamdatatype", length=50)
public String getOutputparamdatatype() {
return this.outputparamdatatype;
}
public void setOutputparamdatatype(String outputparamdatatype) {
this.outputparamdatatype = outputparamdatatype;
}
@Column(name="isCountQuery", length=10)
public String getIsCountQuery() {
return this.isCountQuery;
}
public void setIsCountQuery(String isCountQuery) {
this.isCountQuery = isCountQuery;
}
public String getIsDynamicWhereQry() {
return isDynamicWhereQry;
}
public void setIsDynamicWhereQry(String isDynamicWhereQry) {
this.isDynamicWhereQry = isDynamicWhereQry;
}
public String getIsPaginationRequired() {
return isPaginationRequired;
}
public void setIsPaginationRequired(String isPaginationRequired) {
this.isPaginationRequired = isPaginationRequired;
}
public String getBiInputParameters() {
return biInputParameters;
}
public void setBiInputParameters(String biInputParameters) {
this.biInputParameters = biInputParameters;
}
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="operations")
public List<OperationParameters> getOperationParameterses() {
return this.operationParameterses;
}
public void setOperationParameterses(List<OperationParameters> operationParameterses) {
this.operationParameterses = operationParameterses;
}
}
package com.abcprocure.servicerepo.model;// Generated Feb 9, 2012 11:30:06 AM by Hibernate Tools 3.2.1.GA
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name="OperationParameters"
,schema="dbo"
)
public class OperationParameters implements java.io.Serializable {
private int parameterId;
private Operations operations;
private String inputOutputParamName;
private String inputOutputParamType;
private String inputOutputParamDataType;
public OperationParameters() {
}
public OperationParameters(int parameterId, Operations operations, String inputOutputParamName, String inputOutputParamType, String inputOutputParamDataType) {
this.parameterId = parameterId;
this.operations = operations;
this.inputOutputParamName = inputOutputParamName;
this.inputOutputParamType = inputOutputParamType;
this.inputOutputParamDataType = inputOutputParamDataType;
}
@Id
@GeneratedValue
@Column(name="parameterId", unique=true, nullable=false)
public int getParameterId() {
return this.parameterId;
}
public void setParameterId(int parameterId) {
this.parameterId = parameterId;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="operationId", nullable=false)
public Operations getOperations() {
return this.operations;
}
public void setOperations(Operations operations) {
this.operations = operations;
}
@Column(name="inputOutputParamName", nullable=false, length=250)
public String getInputOutputParamName() {
return this.inputOutputParamName;
}
public void setInputOutputParamName(String inputOutputParamName) {
this.inputOutputParamName = inputOutputParamName;
}
@Column(name="inputOutputParamType", nullable=false, length=250)
public String getInputOutputParamType() {
return this.inputOutputParamType;
}
public void setInputOutputParamType(String inputOutputParamType) {
this.inputOutputParamType = inputOutputParamType;
}
@Column(name="inputOutputParamDataType", nullable=false, length=250)
public String getInputOutputParamDataType() {
return this.inputOutputParamDataType;
}
public void setInputOutputParamDataType(String inputOutputParamDataType) {
this.inputOutputParamDataType = inputOutputParamDataType;
}
}
/** * Method that will serve the post request to add the operation and operation parameters submitted by the user.
* @param operations
* @param map
* @return {@link String} The view name that will redirect to the get request to display the previous page with newly entered operation in the list.
*/
@RequestMapping(value="/add", method=RequestMethod.POST)
public String addOperations(@ModelAttribute Operations operations, ModelMap map) {
operations.getOperationParameterses().removeAll(Collections.singleton(null));
for(int i=0; i<operations.getOperationParameterses().size(); i++) {
System.out.println("parameterName :: " + ((OperationParameters)operations.getOperationParameterses().get(i)).getInputOutputParamName());
if(((OperationParameters)operations.getOperationParameterses().get(i)).getInputOutputParamName() == null || "".equalsIgnoreCase((((OperationParameters)operations.getOperationParameterses().get(i))).getInputOutputParamName())) {
operations.getOperationParameterses().remove(i);
System.out.println("empty parameter removed....");
}
}
return "redirect:/operations/" + operations.getServices().getServiceId();
}
在这方面任何好的建议或榜样都会对我有很大的帮助。:)
**
回答：
**
我还想知道是否可以验证字段数组并将错误显示回jsp文件中？
请帮帮我。
回答：
经过一周的头脑风暴，我自己找到了解决方案。我很高兴终于实现了这一目标。:)
为了验证动态生成的字段，您需要依赖服务器端的自定义验证。因为如果我们对动态生成的字段使用基于注释的验证，那么验证后它将不会出现在控制器功能中。
因此，每当您执行自定义验证时，都会从控制器函数中调用验证。在这里，您可以在列表中动态生成的字段上生成错误。
如果验证不成功，则需要返回jsp页面并在表单上显示错误。您需要使用以下命令显示动态生成的字段值及其错误 ****。
我希望这对希望同样工作的其他人有所帮助。
以上是 如何验证服务器端动态生成的字段 的全部内容， 来源链接： utcz.com/qa/406154.html
