需要帮助的Hibernate和JPQL语法

Question

我是新来发挥框架和冬眠，我有一个简单的问题，我无法解决

public static void listMembers(int page,int pageSize,String[] fields,String[] values) { 
    List<Member> members = Member.find(query,params).fetch(); 
    render(members); 
} 

我不确定如何编写查询和PARAMS
我想每个字段对相应的值进行检查

是这样的（产生错误）：

public static void listMembers(int page,int pageSize,String[] fields,String[] values) { 
    String query = "" ; 
    String[] params = new String[values.length*2] ; 
    int i = 0 ; 
    for(i = 0 ; i < fields.length-1 ; i+=2) { 
     query += "?"+(i+1)+" like ?"+(i+2)+" AND" ; 
     params[i] = fields[i] ; 
     params[i+1] = "%"+values[i]+"%" ; 
    } 
    query += "?"+(i+1)+" like ?"+(i+2) ; 
    params[i] = fields[i] ; 
    params[i+1] = values[i] ; 


    List<Member> members = Member.find(query,params).fetch(); 
    render(members); 
} 

编辑： 使得查询将是：

?1 like ?2 AND ?3 like ?4 AND ..... 

，而params将是：

field1,%value1%,field2,%value2%,... 

Answer 1

我认为这是更好地使用的setParameter（）和EntityManager的：

String jpql = "select m from Member m where "; 
for (int i = 0; i < fields.length; i++) { 
jpql += (i > 0 ? " AND " : "") + fields[i] + " like '%?%' "; 
} 
Query q = entityManager.createQuery(jpql); 
for (int i = 1; i <= values; i++) { 
q.setParameter(i, values[i]); 
} 
List<Members> members = q.getResultList();