spring boot 集成solr

首先solr服务器安装过程不再赘述，在客户端集成的时候踩了点坑，记录下来，大家一起学习~

在pom文件的

dependencyManagement -》 dependencies

标签里面添加

<dependency>
 	<groupId>org.springframework.data</groupId>
	<artifactId>spring-data-solr</artifactId>
	<version>${spring.data.solr.version}</version>
</dependency>

properties

标签里面添加

<spring.data.solr.version>2.1.1.RELEASE</spring.data.solr.version>

下面是solr的jar包，

<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-solr -->
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-solr</artifactId>
		</dependency>

注入SolrClient,及相关代码

 @Autowired
    private SolrClient client;

    @RequestMapping("/testSolr")
    public String testSolr(String param) throws IOException, SolrServerException {
        try {
            //查询参数对象，继承了SolrParams抽象类
            ModifiableSolrParams params =new ModifiableSolrParams();
            //查询条件
            params.add("q","companyName:*"+param+"*");
            //这里的分页和mysql分页一样
            params.add("start","0");
            params.add("rows","10");
            QueryResponse query = client.query(params);
            //查询结果
            SolrDocumentList results = query.getResults();
            //将查询结果直接转化为List，这里有个坑，对象每个属性必须要加 @Field("id") 属性，包为import org.apache.solr.client.solrj.beans.Field;
            //如果不加属性的话，会返回相等长度的的List，但是List里面每个对象的值均为空
            List<SimplePublicCustomer> beans = query.getBeans(SimplePublicCustomer.class);
            return results.toString();
        }catch (Exception e){
            e.printStackTrace();
        }
       return null;
    }

完~

tips：

因为本人比较懒。所以不想去解析返回来的值，再一个一个组装成List，所以看了下query.getBeans 这个方法的源码：

 DocumentObjectBinder  类
 public <T> List<T> getBeans(Class<T> clazz, SolrDocumentList solrDocList) {

        List fields = this.getDocFields(clazz); //这个句话获取你对象里面的属性列表
        ArrayList result = new ArrayList(solrDocList.size());
        Iterator i$ = solrDocList.iterator();

        while(i$.hasNext()) {
            SolrDocument sdoc = (SolrDocument)i$.next();
            result.add(this.getBean(clazz, fields, sdoc));
        }

        return result;
    }

    private List<DocumentObjectBinder.DocField> getDocFields(Class clazz) {
        List fields = (List)this.infocache.get(clazz);    	
        if(fields == null) {
            Map var3 = this.infocache;
            synchronized(this.infocache) {
                this.infocache.put(clazz, fields = this.collectInfo(clazz)); //从缓存中获取不到相关信息，则执行collectiInfo方法获取
            }
        }

        return fields;
    }

    private List<DocumentObjectBinder.DocField> collectInfo(Class clazz) {
        ArrayList fields = new ArrayList();
        Class superClazz = clazz;

        ArrayList members;
        for(members = new ArrayList(); superClazz != null && superClazz != Object.class; superClazz = superClazz.getSuperclass()) {
            members.addAll(Arrays.asList(superClazz.getDeclaredFields()));
            members.addAll(Arrays.asList(superClazz.getDeclaredMethods()));
        }

        boolean childFieldFound = false;
        Iterator i$ = members.iterator();

        while(i$.hasNext()) { 
            final AccessibleObject member = (AccessibleObject)i$.next();
            if(member.isAnnotationPresent(Field.class)) {            //重点：获取当前字段的注解，如果没有注解，则不添加此字段！
                AccessController.doPrivileged(new PrivilegedAction() {
                    @SuppressForbidden(
                        reason = "Needs access to possibly private @Field annotated fields/methods"
                    )
                    public Void run() {
                        member.setAccessible(true);
                        return null;
                    }
                });
                DocumentObjectBinder.DocField df = new DocumentObjectBinder.DocField(member);
                if(df.child != null) {
                    if(childFieldFound) {
                        throw new BindingException(clazz.getName() + " cannot have more than one Field with child=true");
                    }

                    childFieldFound = true;
                }

                fields.add(df);
            }
        }

        return fields;
    }

基本上就这些，solr客户端集成基本完事，更详细的请看api等资料。

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