由于使用SolrJ自带的addBean和addBeans老是出现了org.apache.solr.client.solrj.beans.BindingException: Could not instantiate object of class com.study.model.SolrItem 

然后发现是Solr添加数据的时候加多了个_version_的问题

为了解决这个问题，采用的如下的方法

/**

 * SolrUtil帮助类 能够将SolrDocument转换为Java对象

 * @Title SolrUtil

 * @Description :

 * @Author: huangxincheng

 * @Date:2017年4月24日

 */

public class SolrUtil {

public static final <T> List<T> getBeans(Class<T> clazz, SolrDocumentList solrDocumentList) throws Exception{

List<T> list = new ArrayList<T>();

T t = null;

for (SolrDocument solrDocument : solrDocumentList) {

//反射出实例

t = clazz.newInstance();

//获取所有属性

Field[] fields = clazz.getDeclaredFields();

for (Field field : fields) {

//判断这个属性上是否存在注解SolrField //存在的话 设置值

if (field.isAnnotationPresent(SolrField.class)) {

//获取注解

SolrField solrField = field.getAnnotation(SolrField.class);

if ("".equals(solrField.value())) {

// 如果注解为默认的 采用此属性的name来从solr中获取值

BeanUtils.setProperty(t, field.getName(), solrDocument.get(field.getName()));

} else {

// 如果注解为不是默认的 采用此注解上的值来从solr中获取值

BeanUtils.setProperty(t, field.getName(), solrDocument.get(solrField.value()));

}

}

}

list.add(t);

}

return list;

}

public static final <T> T getBean(Class<T> clazz, SolrDocument solrDocument) throws Exception {

//反射出实例

T t = clazz.newInstance();

//获取所有属性

Field[] fields = clazz.getDeclaredFields();

for (Field field : fields) {

//判断这个属性上是否存在注解SolrField //存在的话 设置值

if (field.isAnnotationPresent(SolrField.class)) {

//获取注解

SolrField solrField = field.getAnnotation(SolrField.class);

if (SolrDefaultValueFunid.DEFAULT_SOLR_FIEL_VALUE.equals(solrField.value())) {

// 如果注解为默认的 采用此属性的name来从solr中获取值

BeanUtils.setProperty(t, field.getName(), solrDocument.get(field.getName()));

} else {

// 如果注解为不是默认的 采用此注解上的值来从solr中获取值

BeanUtils.setProperty(t, field.getName(), solrDocument.get(solrField.value()));

}

}

}

return t;

}

public static final <T> void addBean(T t, HttpSolrClient httpSolrClient, String solrCore) throws Exception{

Field[] fields = t.getClass().getDeclaredFields();

SolrInputDocument doc = new SolrInputDocument();

for (Field field : fields) {

if (field.isAnnotationPresent(SolrField.class)) {

SolrField solrField = field.getAnnotation(SolrField.class);

if (SolrDefaultValueFunid.DEFAULT_SOLR_FIEL_VALUE.equals(solrField.value())) {

doc.addField(field.getName(), field.get(t));

}  else {

doc.addField(solrField.value(), field.get(t));

}

}

}

httpSolrClient.add(solrCore, doc);

httpSolrClient.commit(solrCore);

}

public static final <T> void addBeans(List<T> list, HttpSolrClient httpSolrClient, String solrCore) throws Exception{

List<SolrInputDocument> docs = new ArrayList<SolrInputDocument>();

for (T t : list) {

Field[] fields = t.getClass().getDeclaredFields();

SolrInputDocument doc = new SolrInputDocument();

for (Field field : fields) {

if (field.isAnnotationPresent(SolrField.class)) {

SolrField solrField = field.getAnnotation(SolrField.class);

if (SolrDefaultValueFunid.DEFAULT_SOLR_FIEL_VALUE.equals(solrField.value())) {

doc.addField(field.getName(), field.get(t));

}  else {

doc.addField(solrField.value(), field.get(t));

}

}

}

docs.add(doc);

}

httpSolrClient.add(solrCore ,docs);

httpSolrClient.commit(solrCore);

}

public static final void deleteById(HttpSolrClient httpSolrClient, String solrCore, String id) throws Exception{

httpSolrClient.deleteById(solrCore, id);

}

public static final void deleteById(HttpSolrClient httpSolrClient, String solrCore, String[] ids) throws Exception{

httpSolrClient.deleteById(solrCore, Arrays.asList(ids));

}

public static final void deleteById(HttpSolrClient httpSolrClient, String solrCore, List<String> ids) throws Exception{

httpSolrClient.deleteById(solrCore, ids);

}

public static final void deleteByQuery(HttpSolrClient httpSolrClient, String solrCore, String query) throws Exception{

httpSolrClient.deleteByQuery(solrCore, query);

}

}

/**

 * 

 * @Title SolrItem

 * @Description :

 * @Author: huangxincheng

 * @Date:2017年4月24日

 */

public class SolrItem {

@SolrField

public Long id;

@SolrField

public String item_title;

@SolrField

public String item_sell_point;

@SolrField

public Long item_price;

@SolrField

public Integer item_cid;

@SolrField

public String item_image;

@SolrField

public String item_cname;

public Integer getItem_cid() {

return item_cid;

}

public void setItem_cid(Integer item_cid) {

this.item_cid = item_cid;

}

public Long getId() {

return id;

}

public void setId(Long id) {

this.id = id;

}

public String getItem_title() {

return item_title;

}

public void setItem_title(String item_title) {

this.item_title = item_title;

}

public String getItem_sell_point() {

return item_sell_point;

}

public void setItem_sell_point(String item_sell_point) {

this.item_sell_point = item_sell_point;

}

public Long getItem_price() {

return item_price;

}

public void setItem_price(Long item_price) {

this.item_price = item_price;

}

public String getItem_image() {

return item_image;

}

public void setItem_image(String item_image) {

this.item_image = item_image;

}

public String getItem_cname() {

return item_cname;

}

public void setItem_cname(String item_cname) {

this.item_cname = item_cname;

}

@Override

public String toString() {

return "SolrItem [id=" + id + ", item_title=" + item_title + ", item_sell_point=" + item_sell_point

+ ", item_price=" + item_price + ", item_cid=" + item_cid + ", item_image=" + item_image

+ ", item_cname=" + item_cname + "]";

}

}

/**

 * 

 * @Title SolrField 

 * @Description :

 * @Author: huangxincheng

 * @Date:2017年4月24日

 */

@Target(ElementType.FIELD)

@Retention(RetentionPolicy.RUNTIME)

public @interface SolrField {

String value() default SolrDefaultValueFunid.DEFAULT_SOLR_FIEL_VALUE;

}

/**

 * 

 * @Title SolrDefaultValueFunid 

 * @Description :

 * @Author: huangxincheng

 * @Date:2017年4月24日

 */

public interface SolrDefaultValueFunid {

public String DEFAULT_SOLR_FIEL_VALUEhttp://www.mamicode.com/= "";

}

本文出自 “12265610” 博客，谢绝转载！

解决solrj getBean和getBeans出错